Pith Number

pith:S5JOCZD7

pith:2026:S5JOCZD7MEIIPZJUYN3KJJBDCT

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Magnesium-graphene interphase boundaries created by high-pressure torsion enhance hydrogen storage kinetics:Mechanisms and significance of activation energy and frequency factor

Anthony Alhayek, Baran Bidyut Saha, Kaveh Edalati, Marc Novelli, Md. Amirul Islam, Payam Edalati, Runchen Zhou, Shivam Dangwal, Thierry Grosdidier

Magnesium-graphene interphase boundaries created by high-pressure torsion increase the frequency factor for hydrogen desorption while activation energy stays fixed at 145 kJ/mol.

arxiv:2605.13184 v1 · 2026-05-13 · cond-mat.mtrl-sci

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Claims

C1strongest claim

Kinetic modeling reveals that the rate-controlling mechanism transits from interfacial reaction in coarse-grained magnesium to atomic diffusion in magnesium-graphene nanocomposites. Kissinger analysis shows that the activation energy for hydrogen desorption remains unchanged at 145 +/- 2 kJ/mol, regardless of the presence of grain or interphase boundaries. However, the frequency factor increases with the generation of interfaces, which serve as sites for hydrogen diffusion and heterogeneous metal/hydride nucleation.

C2weakest assumption

That the increase in frequency factor and the shift in rate-controlling mechanism are caused specifically by the magnesium-graphene interphase boundaries rather than other processing-induced changes such as overall grain refinement or residual strain.

C3one line summary

Magnesium-graphene nanocomposites made by high-pressure torsion show faster hydrogen storage kinetics because interfaces increase the frequency factor for diffusion and nucleation, while activation energy stays fixed at 145 kJ/mol.

References

63 extracted · 63 resolved · 0 Pith anchors

[1] Hydrogen energy systems: a critical review of technologies, applications, trends and challenges 2021

[2] Materials for hydrogen -based energy storage - past, recent progress and future outlook 2020

[3] Application of hydrides in hydrogen storage and compression: achievements, outlook and perspectives 2019

[4] Magnesium based materials for hydrogen based energy storage: past, present and future 2019

[5] Magnesium - and intermetallic alloys -based hydrides for energy storage: modelling, synthesis and properties 2022

Receipt and verification

First computed	2026-05-18T03:08:56.300325Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9752e1647f611087e534c376a4a42314e359d0107e844fa5b9cd9670e468a8b5

Aliases

arxiv: 2605.13184 · arxiv_version: 2605.13184v1 · doi: 10.48550/arxiv.2605.13184 · pith_short_12: S5JOCZD7MEII · pith_short_16: S5JOCZD7MEIIPZJU · pith_short_8: S5JOCZD7

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Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9752e1647f611087e534c376a4a42314e359d0107e844fa5b9cd9670e468a8b5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b082804415fd64d1d460dd4e929dc83ae576506b37dc65dad65b79b53f8f1415",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
    "primary_cat": "cond-mat.mtrl-sci",
    "submitted_at": "2026-05-13T08:42:41Z",
    "title_canon_sha256": "34e193ae97df5612ace23cc5ecdd974faac1803db21180453c01907e29d6e07e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.13184",
    "kind": "arxiv",
    "version": 1
  }
}