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REVIEW 4 major objections 5 minor 48 references

Mixed atomic-scale electronic configuration as a strategy to avoid cocatalyst utilization in photocatalysis by high-entropy oxides

T0 review · 4 major / 5 minor · reviewed 2026-08-10 · deepseek-v4-flash

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Pith's one-line read A high-entropy oxide splits water and converts CO2 without platinum.

desk verdict A well-characterized new HEO photocatalyst that works without Pt; the d0/d10 design criterion is plausible but not yet cleanly isolated from oxygen vacancies and the dual-phase microstructure. read the letter →

arxiv 2501.09441 v1 pith:24HUYM2K submitted 2025-01-16 cond-mat.mtrl-sci

Jacqueline Hidalgo-Jiménez , Taner Akbay , Xavier Sauvage (GPM) , Tatsumi Ishihara (WPI-I2CNER) , Kaveh Edalati (WPI-I2CNER) This is my paper · ORCID
classification cond-mat.mtrl-sci
keywords high-entropyoxidesphotocatalysiscocatalyst-freed0/d10electronicconfigurationelectronegativityCO2conversionwatersplittingoxygenvacancies
verification ladder T0 review T1 audit T2 compute T3 formal

The pith

A machine-rendered reading of the paper's core claim, the machinery that carries it, and where it could break.

The reading

This paper claims that a photocatalyst can be designed to work without noble-metal cocatalysts by mixing cations with empty $d$ orbitals (electron donors) and a cation with a full $d$ orbital and high electronegativity (electron acceptor) within one high-entropy oxide lattice. It demonstrates this with TiZrNbTaGaO$_{10.5}$, a dual-phase oxide that converts CO$_2$ into CO and CH$_4$ and produces hydrogen from water with a methanol hole scavenger, with no platinum or gold added. The authors propose that gallium acts as an internal electron trap, taking over the role a platinum cocatalyst normally plays, while oxygen vacancies and suppressed radiative recombination assist charge separation. If this design criterion holds, it points toward precious-metal-free photocatalysts for hydrogen production and CO$_2$ conversion.

What carries the argument

The central object is the dual-phase high-entropy oxide TiZrNbTaGaO$_{10.5}$ (88 wt% orthorhombic Pbcn, 12 wt% monoclinic C2/m), synthesized by high-pressure torsion followed by calcination. The load-bearing mechanism is the pairing of $d^0$ electron-donor cations (Ti, Zr, Nb, Ta), which contribute to the conduction band minimum, with the $d^{10}$ electron-acceptor cation Ga, which has the highest electronegativity among the chosen cations and is enriched on the surface, thereby acting as an internal electron trap analogous to a platinum cocatalyst. Oxygen vacancies, generated by the mixed cation valences, are invoked as additional active sites and as an interphase pathway for charge separation.

What would settle it

Time-resolved photoluminescence or transient absorption spectroscopy on TiZrNbTaGaO$_{10.5}$ should show long-lived electrons localized at gallium sites; if the electron population instead resides at oxygen vacancies or at the orthorhombic/monoclinic heterojunction, with no distinct trapped-electron signature from gallium, then the $d^{10}$ internal-trap mechanism is not the cause of the cocatalyst-free activity.

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Extended reading notes

Core claim

On the paper's own terms, the central discovery is that mixing $d^0$ cations (Ti, Zr, Nb, Ta) with a $d^{10}$ cation (Ga) in the high-entropy oxide TiZrNbTaGaO$_{10.5}$ creates atomic-scale electron donor and acceptor sites, so the material performs photocatalytic CO$_2$ reduction (to CO and CH$_4$) and hydrogen evolution without any cocatalyst. The authors report that adding 1 wt% platinum does not improve the hydrogen production rate, and they attribute the cocatalyst-free activity to gallium's high electronegativity and its surface enrichment, which lets it trap electrons the way a noble-metal cocatalyst would. They also find a 2.5 eV bandgap, visible-light absorption, oxygen vacancies from mixed cation valences, and strongly suppressed radiative recombination, and they use these observations to argue that heterogeneous electronic configurations and electronegativities are a general design criterion for avoiding cocatalysts.

Load-bearing premise

The design criterion rests on gallium actually trapping electrons the way a platinum cocatalyst does, but the paper infers this from gallium's electronegativity, its surface enrichment in XPS, and a prior DFT study rather than from a direct measurement of electron trapping or charge transfer at gallium sites.

Editorial extensions

If this is right

  • High-entropy oxides with mixed $d^0$/$d^{10}$ cations can be designed without noble-metal cocatalysts, lowering material cost for photocatalytic hydrogen production and CO$_2$ conversion.
  • The design criterion should extend to other combinations of $d^0$ and $d^{10}$ (or otherwise high-electronegativity) cations, giving a general recipe for cocatalyst-free photocatalysts.
  • The dual-phase structure and oxygen vacancies contribute to charge separation, meaning crystal-phase engineering and defect control are additional levers alongside electronic configuration.
  • Cocatalyst-free activity depends on the cation being both high-electronegativity and surface-enriched, so atomic-scale distribution of the acceptor element matters.
  • Replacing gallium with a $d^0$ cation (e.g., hafnium) degrades both cocatalyst-free activity and overall rates, confirming the role of the $d^{10}$ element in the design.

Reading between the lines

Editorial extensions of the paper, not claims the author makes directly.

  • If the internal-trap mechanism is correct, substituting other high-electronegativity cations (e.g., In$^{3+}$, Sn$^{4+}$, Zn$^{2+}$) for gallium should preserve cocatalyst-free activity, and the rate should correlate with the acceptor's electronegativity and surface concentration; the paper does not test this.
  • The absence of hydrogen from pure water means the design replaces the noble-metal cocatalyst but not the need for a hole scavenger; extending the criterion to true overall water splitting would require pairing the electron trap with a comparable hole-extraction site.
  • The low surface area of the HPT-synthesized powder (0.01 m$^2$/g) leaves open whether the same design criterion survives in high-surface-area nanoparticle morphologies, which would be the practical form for applications.
  • Because the material contains 12 wt% of a Ta-Nb-rich monoclinic phase, the phase heterojunction alone could contribute to charge separation; directly separating the gallium effect from the heterojunction effect would require a single-phase Ga-containing HEO control.
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Editorial analysis

A structured set of objections, weighed in public.

Desk editor's note, referee report, and a circularity audit.

Referee Report

4 major / 5 minor

Summary. The paper reports the design, synthesis, and photocatalytic testing of the high-entropy oxide TiZrNbTaGaO10.5, obtained by high-pressure torsion followed by calcination. The material contains 88 wt% orthorhombic (Pbcn) and 12 wt% monoclinic (C2/m) phases, absorbs UV and visible light with a bandgap of about 2.5 eV, shows oxygen vacancies by ESR, and exhibits surface gallium enrichment by XPS. Under UV light, the oxide produces CO and CH4 from CO2 and H2 from a water/methanol mixture, with no further increase when 1 wt% Pt is added; no H2 or O2 is produced from pure water, and no H2 is detected under 415 nm LED irradiation. The authors propose that mixing d0 electron-donor cations (Ti, Zr, Nb, Ta) with a d10 high-electronegativity cation (Ga) creates internal electron-acceptor sites, replacing noble-metal cocatalysts.

Significance. If the central claim is sustained, the work offers a genuinely useful design strategy: a noble-metal-free HEO photocatalyst that is active for CO2 reduction and sacrificial hydrogen evolution, with a direct experimental comparison showing that added Pt does not improve activity. The paper's strengths include the systematic synthesis and structural characterization, the explicit and falsifiable hypothesis, the absence of any fitted parameters in the experimental analysis, and the stability check by post-reaction XRD. However, the manuscript as written overstates the water-splitting result and does not provide direct evidence for the proposed gallium electron-trap mechanism; the activity is demonstrated, but its attribution to the mixed d0/d10 electronic configuration is underdetermined by the available experiments.

major comments (4)
  1. [Abstract; §3.3 (Fig. 7c); Conclusions] The abstract and conclusions repeatedly state that the material performs 'hydrogen production from water splitting' and 'water splitting without cocatalyst addition.' This is contradicted by the paper's own data: Fig. 7(c) shows zero H2 and zero O2 when only deionized water is used, and H2 is produced only when methanol is added as a sacrificial hole scavenger. The claim should be corrected to 'hydrogen evolution from water with a sacrificial agent' or 'sacrificial photocatalytic hydrogen production'; otherwise the central experimental result is overstated in a way that affects the paper's main message.
  2. [§3.3, Fig. 7(c); §2.3] The paper presents the 2.5 eV bandgap and visible-light absorbance as favorable photocatalytic properties, but the visible-light test (415 nm LED for 24 h) produced no detectable hydrogen. As written, the abstract and Section 4 implicitly associate the visible bandgap with photocatalytic utility without stating that no visible-light activity was observed. The authors should either report visible-light CO2 conversion or explicitly state that the visible-light absorption does not lead to measureable H2 evolution under the tested conditions, to avoid an unwarranted visible-light activity claim.
  3. [§4; §3.1; Fig. 6(e); Table 1] The central mechanistic claim that gallium acts as an internal electron acceptor/cocatalyst is inferred, not directly demonstrated. The evidence is indirect: XPS shows surface gallium enrichment (9.8 at% vs ~5 at% nominal), and the discussion invokes gallium's electronegativity and prior DFT calculations (ref. [14]), but no measurement of electron trapping, charge transfer, or charge localization at Ga is provided. Moreover, the material is dual-phase (12 wt% Ta-Nb-rich monoclinic phase) and contains oxygen vacancies; the authors themselves state that heterojunctions and surface vacancies can be beneficial for charge separation. The only d0 comparison is with TiZrHfNbTaO11 from earlier reports (refs. [8,12]), a different composition synthesized by a different route. Consequently, the 'mixed d0/d10 electronic configuration' design criterion is confounded with oxygen-vacancy and heterojunction effects, and the conclusion that this specific electronic mixing avoids the need for cocatalysts is not uniquely supported.
  4. [§3.3, Fig. 7, Eq. (1)] The photocatalytic data are reported without error bars, replicates, or uncertainty estimates, and the units are inconsistent between the text (μmol h−1 g−1) and the figure captions (per surface area). Eq. (1) includes the H2 evolution rate in the selectivity calculation for CO2 reduction, but no H2 value is reported for the CO2 conversion experiment. These omissions make it difficult to assess the reliability of the central quantitative claims, including the 'no-Pt equals Pt' comparison and the reported CO/CH4 production rates.
minor comments (5)
  1. [Abstract; §3.1; Table 1] The abstract states the monoclinic phase is I2/m, while Section 3.1 and Table 1 specify the space group as C2/m. The authors should reconcile this inconsistency (e.g., by clarifying if I2/m is intended as a non-standard setting).
  2. [§2.3] For the CO2 conversion experiment, the reactor volume (858 ml) and light intensity are given, but the gas flow is listed as '30 ml/min' without specifying whether products were measured in the effluent only; please clarify the sampling protocol.
  3. [§4, paragraph 3] The statement that the 'high selectivity of this HEO for CO2 oxidation' should be 'CO2 reduction' — the text discusses reduction products (CO, CH4), so 'oxidation' appears to be a wording error.
  4. [§3.2, Fig. 6(d)] The band diagram in Fig. 6(d) shows a 'second gap' near 1.8 eV and defect states, but the labels in the figure are not described in the caption; please add explicit markers to distinguish the bandgap, the defect level, and the redox potentials shown.
  5. [§3.3, Fig. 7(c)] The text notes that 'a small part of hydrogen may also come from the transformation of methanol by holes.' This caveat is important and would be more convincing if supported by an isotopic (D2O/CD3OH) experiment or by reporting H2/O2 stoichiometry, at least in the discussion.

Circularity Check

0 steps flagged · score 0.0 of 10

No significant circularity: the cocatalyst-free activity is directly measured, and the d0/d10 mechanism is an explicitly deferred inference, not a fitted or self-cited prediction.

full rationale

The paper contains no fitted parameter that is later relabeled as a prediction, no equation-level derivation that reduces to its own inputs, and no uniqueness theorem imported from the authors' prior work. The central experimental claim, that TiZrNbTaGaO10.5 produces H2, CO, and CH4 without a noble-metal cocatalyst, is directly measured in Section 3.3 (Fig. 7), including an in-paper comparison with a Pt-loaded sample showing no activity increase. The proposed mechanism, in which Ga acts as an internal electron acceptor due to its d10 configuration and high electronegativity, is an interpretation supported by XPS surface Ga enrichment and prior DFT [14]. Crucially, the authors state in Section 4 that 'future studies are needed to synthesize the nanoparticles of these oxides by methods other than severe plastic deformation and experimentally clarify the mechanisms,' so the mechanism is not presented as a derived consequence of the present data. The comparisons to the all-d0 TiZrHfNbTaO11 from refs. [8,12] are separate prior experiments, not outputs of the present model; they may be confounded by differences in synthesis, phase composition, surface area, and oxygen-vacancy content, but that is an evidentiary weakness rather than circularity. The SQS structural models (Fig. 5) are validated against measured XRD patterns and are not used to predict photocatalytic rates. No step reduces by construction or by a self-citation chain to its own input.

Assumptions & free parameters 0 free parameters · 5 assumptions · 0 invented entities

The central claim depends on literature assumptions about the electronic roles of d0 and d10 cations and on the unverified premise that gallium acts as an internal electron trap. No new particles, forces, or fitted physical constants are introduced. The one interpretive assumption about band structure assignment is flagged.

assumptions (5)
  • domain assumption Elements with d0 electronic configuration strongly contribute to the conduction band minimum and act as electron donors.
    Invoked in Section 4 to justify choosing Ti, Zr, Nb, Ta as the electron-donating side of the design; based on Ref [37].
  • domain assumption d10 configuration elements have conduction bands with high dispersion from sp orbitals, giving high charge mobility and charge separation.
    Invoked in Section 4 for gallium; based on Refs [38,39].
  • domain assumption Gallium's higher electronegativity allows it to act as an electron trap, functioning like a cocatalyst.
    Central mechanistic premise of the design strategy; supported only by prior first-principles work [14] by the same group, not by direct measurement here.
  • domain assumption The measured optical bandgap and valence band positions mainly correspond to the dominant orthorhombic phase (88 wt%).
    Stated in Section 3.2; the two-phase sample prevents unambiguous assignment of the 2.5 eV gap and the band alignment used to argue suitability for water splitting and CO2 reduction.
  • domain assumption Surface oxygen vacancies act as active sites for adsorption of water and CO2 and improve charge separation.
    Invoked in Section 4 to explain the role of defects observed in ESR; based on Refs [34,35,43].

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Pith. "Pith review of Mixed atomic-scale electronic configuration as a strategy to avoid cocatalyst utilization in photocatalysis by high-entropy oxides." pith.science (2026). https://pith.science/paper/24HUYM2K

@misc{pith2026250109441,
  author       = {Pith},
  title        = {Pith review of: Mixed atomic-scale electronic configuration as a strategy to avoid cocatalyst utilization in photocatalysis by high-entropy oxides},
  year         = {2026},
  howpublished = {\url{https://pith.science/paper/24HUYM2K}},
  note         = {Machine review of arXiv:2501.09441}
}
read the original abstract

To enhance the activity of photocatalysts for hydrogen production and CO2 conversion, noble metal cocatalysts as electron traps and/or acceptors such as platinum or gold are usually utilized. This study hypothesizes that mixing elements with heterogeneous electronic configurations and diverse electronegativities can provide both acceptor and donor sites of electrons to avoid using cocatalysts. This hypothesis was examined in high-entropy oxides (HEOs), which show high flexibility for atomic-scale compositional changes by keeping their single-or dual-phase structure. A new highentropy oxide was designed and synthesized by mixing elements with an empty d orbital (titanium, zirconium, niobium and tantalum) and a fully occupied d orbital (gallium). The oxide, synthesized by high-pressure torsion followed by calcination, had two phases (88 wt% orthorhombic (Pbcn) and 12 wt% monoclinic (I2/m)) with an overall composition of TiZrNbTaGaO10.5. It exhibited UV and visible light absorbance with a low bandgap of 2.5 eV, low radiative electron-hole recombination and oxygen vacancy generation due to mixed valences of cations. It successfully acted as a photocatalyst for CO and CH4 production from CO2 conversion and hydrogen production from water splitting without cocatalyst addition. These findings confirm that introducing heterogeneous electronic configurations and electronegativities can be considered as a design criterion to avoid the need to use cocatalysts.

Figures

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Figure 4
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Works this paper leans on

48 extracted references · 41 canonical work pages

  1. [14]

    Hidalgo-Jiménez, T

    J. Hidalgo-Jiménez, T. Akbay, T. Ishihara, K. Edalati, Investigation of a high-entropy oxide photocatalyst for hydr ogen generation by first -principles calculations coupled with experiments: significance of electronegativity, Scr. Mater. 250 (2024) 116205. https://doi.org/10.1016/j.scriptamat.2024.116205

    arXiv 2024

  2. [1]

    Patel, J

    G.H. Patel, J. Havukainen, M. Horttanainen, R. Soukka, M. Tuomaala, Climate change performance of hydrogen production based on life cycle assessment, Green Chem. 26 (2024) 992–1006. https://doi.org/10.1039/d3gc02410e

    work page doi:10.1039/d3gc02410e 2024

  3. [2]

    Howarth, M.Z

    R.W. Howarth, M.Z. Jacobson, How green is blue hydrogen?, Energy Sci. Eng. 9 (2021) 1676–1687. https://doi.org/10.1002/ese3.956

    doi:10.1002/ese3.956 2021

  4. [3]

    Fujishima, K

    A. Fujishima, K. Honda, Electrochemical Photolysis of Water at a Semiconductor Electrode, Nature. 238 (1972) 37–38. https://doi.org/10.1038/238037a0

    doi:10.1038/238037a0 1972

  5. [4]

    H. Tong, S. Ouyang, Y. Bi, N. Umezawa, M. Oshikiri, J. Ye, Nano-photocatalytic materials: Possibilities and challenges, Ad v. Mater. 24 (2012) 229 –251. https://doi.org/10.1002/adma.201102752

    doi:10.1002/adma.201102752 2012

  6. [5]

    S. Fang, M. Rahaman, J. Bharti, E. Reisner, M. Robert, G.A. Ozin, Y.H. Hu, Photocatalytic CO2 reduction, Nat. Rev. Methods Prim. 3 (2023) 61. https://doi.org/10.1038/s43586 -023- 00243-w

    work page doi:10.1038/s43586 2023

  7. [6]

    Aamlid, M

    S.S. Aamlid, M. Oudah, J. Rottler, A.M. Hallas, Understanding the role of entropy in high entropy oxides, J. Am. Chem. Soc. 145 (2023) 5991 –6006. https://doi.org/10.1021/jacs.2c11608

    work page doi:10.1021/jacs.2c11608 2023

  8. [7]

    Albedwawi, A

    S.H. Albedwawi, A. AlJaberi, G.N. Haidemenopoulos, K. Polychronopoulou, High entropy oxides-exploring a paradigm of promising catalysts: a review, Mater. Des. 202 (2021) 109534. https://doi.org/10.1016/j.matdes.2021.109534

    work page arXiv 2021

Show all 48 references
  1. [8]

    Edalati, Q

    P. Edalati, Q. Wang, H. Razavi-Khosroshahi, M. Fuji, T. Ishihara, K. Edalati, Photocatalytic hydrogen evolution on a high -entropy oxide, J. Mater. Chem. A. 8 (2020) 3814 –3821. https://doi.org/10.1039/c9ta12846h

    2020 doi

  2. [9]

    Chang, H.Y

    S.C. Chang, H.Y. Chen, P.H. Chen, J.T. Lee, J.M. Wu, Piezo -photocatalysts based on a ferroelectric high -entropy oxide, Appl. Catal. B 324 (2023) 122204. 18 https://doi.org/10.1016/j.apcatb.2022.122204

    2023

  3. [10]

    Y. Yu, S. Liu, H. Wang, S. Zhang, N. Wang, W. Jiang, C. Liu, W. Ding, Z. Zhang, C. Dong, Design, synthesis and photocatalytic performance of A 32Ti8Sn8Nb4Ta4Me8O96 (A=Ba, Sr; Me=Fe, Ga) perovskite structure high entropy oxides, J. Solid State Chem. 317 (2023) 123694. https://d...

    2023

  4. [11]

    Y. Hu, M. Anandkumar, J. Joardar, X. Wang, A.S. Deshpande, K.M. Reddy, Effective band gap engineering in multi -principal oxides (CeGdLa -Zr/Hf)Ox by temperature -induced oxygen vacancies, Sci. Rep. 13 (2023) 2362. https://doi.org/10.1038/s41598-023-29477-0

    2023 doi

  5. [12]

    Akrami, Y

    S. Akrami, Y. Murakami, M. Watanabe, T. Ishihara, M. Arita, M. Fuji, K. Edalati, Defective high-entropy oxide photocatalyst with high activity for CO2 conversion, Appl. Catal. B 303 (2022) 120896. https://doi.org/10.1016/j.apcatb.2021.120896

    2022

  6. [13]

    Akrami, Y

    S. Akrami, Y. Murakami, M. Watanabe, T. Ishihara, M. Arita, Q. Guo, M. Fuji, K. Edalati, Enhanced CO 2 conversion on highly-strained and oxygen -deficient BiVO 4 photocatalyst, Chem. Eng. J. 442 (2022) 136209. https://doi.org/10.1016/j.cej.2022.136209

    2022

  7. [15]

    Güler, M

    Ö. Güler, M. Boyrazlı, M.G. Albayrak, S.H. Güler, T. Ishihar a, K. Edalati, Photocatalytic hydrogen evolution of TiZrNbHfTaOx high-entropy oxide synthesized by mechano-thermal method, Materials 17 (2024) 853. https://doi.org/10.3390/ma17040853

    2024 doi

  8. [16]

    J. Ran, M. Jaroniec, S. Qiao, Cocatalysts in semiconductor‐based photocatalytic CO 2 reduction: achievements, ahallenges, and opportunities, Adv. Mater. 30 (2018) 9 –15. https://doi.org/10.1002/adma.201704649

    2018 doi

  9. [17]

    Devi, B.N

    L.G. Devi, B.N. Murthy, S.G. Kumar, Photocatalytic activity of TiO 2 doped with Zn2+ and V5+ transition metal ions: influence of crystallite size and dopant electronic configuration on photocatalytic activity, Mater. Sci. Eng. B 166 (2010) 1 –6. https://doi.org/10.1016/j.mseb....

    2010 doi

  10. [18]

    M. Wei, Y. Sun, J. Zhang, F. Ai, S. Xi, J. Wang, High-entropy alloy nanocrystal assembled by nanosheets with d-d electron interaction for hydrogen evolution reaction, Energy Environ. Sci. 16 (2023) 4009–4019. https://doi.org/10.1039/d3ee01929b

    2023 doi

  11. [19]

    Huang, J

    H. Huang, J. Zhao, H. Guo, B. Weng, H. Zhang, R.A. Saha, M. Zhang, F. Lai, Y. Zhou, R. Juan, P. Chen, S. Wang, J.A. Steele, F. Zhong, T. Liu, J. Hofkens, Y. Zheng, J. Long, M.B.J. Roeffaers, Noble‐ metal‐free high‐entropy alloy nanoparticles for efficient solar‐driven photocat...

    2024 doi

  12. [20]

    Edalati, A

    K. Edalati, A. Bachmaier, V.A. Beloshenko, Y. Beygelzimer, V.D. Blank, W.J. Botta, K. Bryła, J. Čížek, S. Divinski, N.A. Enikeev, Y. Estrin, G. Faraji, R.B. Figueiredo, M. Fuji, T. Furuta, T. Grosdidier, J. Gubicza, A. Hohenwarter, Z. Horita, J. Huot, Y. Ikoma, M. Janeček, M. ...

    2022

  13. [21]

    Z. Wu, M. Guo, Y. Yan, H. Dou, W. Zhao, Y. Zhang, S. Li, J. Wu, X. Bin, X. Zhao, X. Yang, D. Ruan, Reducing crystallinity of micrometer-sized titanium-niobium oxide through 19 cation substitution for high-rate lithium storage, ACS Sustain. Chem. Eng. 9 (2021) 7422 –

    2021

  14. [22]

    Zhang, L

    N. Zhang, L. Li, G. Li, Nanosized amorphous tantalum oxide: a highly efficient photocatalyst for hydrogen evolution, Res. Chem. Intermed. 43 (2017) 5011 –5024. https://doi.org/10.1007/s11164-017-3052-y

    2017 doi

  15. [23]

    Campanale, E

    F. Campanale, E. Mugnaioli, L. Folco, P. Parlanti, M. Gemmi, TiO 2 II: the high-pressure Zr-free srilankite endmember in impact rocks, Meteorit. Planet. Sci . 59 (2024) 529 –543. https://doi.org/10.1111/maps.14137

    2024 doi

  16. [24]

    Hidalgo-Jiménez, T

    J. Hidalgo-Jiménez, T. Akbay, T. Ishihara, K. Edalati, Understanding high photocatalytic activity of the TiO 2 high-pressure columbite phase by experiments and first -principles calculations, J. M ater. Chem. A 11 (2023) 23523 –23535. https://doi.org/10.1039/d3ta04198k

    2023 doi

  17. [25]

    Basahel, T.T

    S.N. Basahel, T.T. Ali, M. Mokhtar, K. Narasimharao, Influence of crystal structure of nanosized ZrO2 on photocatalytic degradation of methyl orange, Nanoscale Res. Lett. 10 (2015) 73. https://doi.org/10.1186/s11671-015-0780-z

    2015 doi

  18. [26]

    Edalati, X.F

    P. Edalati, X.F. Shen, M. Watanabe, T. Ishihara, M. Arita, M. Fuji, K. Edalati, High-entropy oxynitride as a low -bandgap and stable photocatalyst for hydrogen production, J. Mater. Chem. A 9 (2021) 15076–15086. https://doi.org/10.1039/d1ta03861c

    2021 doi

  19. [27]

    Edalati, Review on recent advancements in severe plastic deformation of oxides by high- pressure torsion (HPT), Adv

    K. Edalati, Review on recent advancements in severe plastic deformation of oxides by high- pressure torsion (HPT), Adv. Eng. Mater. 21 (2019) 1800272. https://doi.org/10.1002/adem.201800272

    2019 doi

  20. [28]

    Maeda, K

    K. Maeda, K. Domen, Photocatalytic water splitting: recent progress and future challenges, J. Phys. Chem. Lett. 1 (2010) 2655–2661. https://doi.org/10.1021/jz1007966

    2010 doi

  21. [29]

    J.D. Yong, R. Valdez, M.Á. Armenta, N. Arjona, G. Pina-Luis, A. Olivas, Influence of Co2+, Cu2+, Ni2+, Zn2+, and Ga3+ on the iron-based trimetallic layered double hydroxides for water oxidation, RSC Adv. 12 (2022) 16955–16965. https://doi.org/10.1039/d2ra01980a

    2022 doi

  22. [30]

    Y. Zhi, Y. Yi, C. Deng, Q. Zhang, S. Yang, F. Peng, Defect -enriched ZnO/ZnS heterostructures derived from hydrozincite intermediates for hydrogen evolution under visible light, ChemSusChem 15 (2022) e202200680. https://doi.org/10.1002/cssc.202200860

    2022 doi

  23. [31]

    Y. Liu, B. Wang, Q. Zhang, S. Yang, Y. Li, J. Zuo, H. Wang, F. Peng, A novel bicomponent Co3S4/Co@C cocatalyst on CdS, accelerating charge separation for highly efficient photocatalytic hydrogen evolution, Green Chem. 22 (2020) 238 –247. https://doi.org/10.1039/c9gc03323h

    2020 doi

  24. [32]

    Kalamaras, M.M

    E. Kalamaras, M.M. Maroto -Valer, M. Shao, J. Xuan, H. W ang, Solar carbon fuel via photoelectrochemistry, Catal. Today. 317 (2018) 56 –75. https://doi.org/10.1016/j.cattod.2018.02.045

    2018 doi

  25. [33]

    Jiang, R

    Z. Jiang, R. Zhang, H. Zhao, J. Wang, L. Jia, Y. Hu, K. Wang, X. Wang, Preparation of (Ga0.2Cr0.2Mn0.2Ni0.2Zn0.2)3O4 high-entropy oxide with narrow bandgap for photocatalytic CO2 reduction with water vapor, Appl. Surf. Sci. 612 (2023) 155809. https://doi.org/10.1016/j.apsusc.2...

    2023

  26. [34]

    Patial, R

    S. Patial, R. Kumar, P. Raizada, P. Singh, Q. Van Le, E. Lichtfouse, D. Le Tri Nguyen, V.H. Nguyen, Boosting light -driven CO 2 reduction into solar fuels: mainstream avenues for engineering ZnO -based photocatalysts, Environ. Res. 197 (2021) 111134. https://doi.org/10.1016/j....

    2021

  27. [35]

    B. Liu, X. Zhao, C. Terashima, A. Fujishima, K. Nakata, Thermodynamic and kinetic analysis of heterogeneous photocatalysis for semiconductor systems, Phys. Chem. Chem. 20 Phys. 16 (2014) 8751–8760. https://doi.org/10.1039/c3cp55317e

    2014 doi

  28. [36]

    S. Xie, Y. Wang, Q. Zhang, W. Deng, Y. Wang, MgO- and Pt-promoted TiO2 as an efficient photocatalyst for the preferential reduction of carbon dioxide in the presence of water, ACS Catal. 4 (2014) 3644–3653. https://doi.org/10.1021/cs500648p

    2014 doi

  29. [37]

    Y. Bao, F. Zhang, Electronic engineering of ABO 3 perovskite metal oxides based on d 0 electronic-configuration metallic ions toward photocatalytic water splitting under visible light, Small Struct. 3 (2022) 2100266. https://doi.org/10.1002/sstr.202100226

    2022 doi

  30. [38]

    Nishiyama, H

    H. Nishiyama, H. Kobayashi, Y. Inoue, Effects of distortion of metal-oxygen octahedra on photocatalytic water-splitting performance of RuO2-loaded niobium and tantalum phosphate bronzes, ChemSusChem 4 (2011) 208–215. https://doi.org/10.1002/cssc.201000294

    2011 doi

  31. [39]

    Inoue, Photocatalytic water splitting by RuO 2-loaded metal oxides and nitrides with d 0- and d 10 -related electronic configurations, Energy Environ

    Y. Inoue, Photocatalytic water splitting by RuO 2-loaded metal oxides and nitrides with d 0- and d 10 -related electronic configurations, Energy Environ. Sci. 2 (2009) 364 –386. https://doi.org/10.1039/b816677n

    2009 doi

  32. [40]

    Pires, G.T

    F.A. Pires, G.T. dos Santos, J. Bettini, C.A.R. Costa, R. V. Gonçalves, R.H.R. Castro, F.L. Souza, Selective placement of modifiers on hematite thin films for solar water splitting, Sustain. Energy Fuels. 7 (2023) 5005–5017. https://doi.org/10.1039/d3se00998j

    2023 doi

  33. [41]

    Mohamed, F

    H.H. Mohamed, F. Al Qarni, N.A. Alomair, Design of porous Ga doped TiO2 nanostructure for enhanced solar light photocatalytic applications, Mater. Res. Bull. 133 (2021) 111057. https://doi.org/10.1016/j.materresbull.2020.111057

    2021

  34. [42]

    Zhang, W

    F. Zhang, W. Zhou, Y. Zhang, Y. Lei, L. Wu, T. Liu, R. Fan, Spectroscopic analyses and photocatalytic properties of transition group metal oxide films with different entropy values, Mater. Sci. Semicond. Process. 169 (2024) 107928. https://doi.org/10.1016/j.mssp.2023.107928

    2024

  35. [43]

    Jiang, H

    W. Jiang, H. Loh, B.Q.L. Low, H. Zhu, J. Low, J.Z.X. Heng, K.Y. Tang, Z. Li, X.J. Loh, E. Ye, Y. Xiong, Role of oxygen vacancy in metal oxides for photocatalytic CO 2 reduction, Appl. Catal. B Environ. 321 (2023) 122079. https://doi.org/10.1016/j.apcatb.2022.122079

    2023

  36. [44]

    S. Jia, J. Gao, Q. Shen, J. Xue, Z. Zhang, X. Liu, H. Jia, Eff ect of oxygen vacancy concentration on the photocatalytic hydrogen evolution performance of anatase TiO 2: DFT and experimental studies, J. Mater. Sci. Mater. Electron. 32 (2021) 13369 –13381. https://doi.org/10.10...

    2021 doi

  37. [45]

    J. Yan, G. Wu, N . Guan, L. Li, Z. Li, X. Cao, Understanding the effect of surface/bulk defects on the photocatalytic activity of TiO 2: anatase versus rutile, Phys. Chem. Chem. Phys. 15 (2013) 10978–10988. https://doi.org/10.1039/c3cp50927c

    2013 doi

  38. [46]

    Y. Ji, Y. Luo, New mechanism for photocatalytic reduction of CO2 on the anatase TiO2(101) surface: the essential role of oxygen vacancy, J. Am. Chem. Soc. 138 (2016) 15896–15902. https://doi.org/10.1021/jacs.6b05695

    2016 doi

  39. [47]

    Edalati, A.Q

    K. Edalati, A.Q. Ahmed, S. Akrami, K. Ameyama, V. Aptukov, R.N. Asfandiyarov, M. Ashida, V. Astanin, A. Bachmaier, V. Beloshenko, E.V. Bobruk, K. Bryła, J.M. Cabrera, A.P. Carvalho, N.Q. Chinh, I.C. Choi, R. Chulist, J.M. Cubero -Sesin, G. Davdian, M. Demirtas, S. Divinski, K....

    2024

  40. [7430]

    https://doi.org/10.1021/acssuschemeng.1c01215

    doi

Pith tools

Reviewed August 10, 2026 · model on record in the stance chip above.