{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2026:S5JOCZD7MEIIPZJUYN3KJJBDCT","short_pith_number":"pith:S5JOCZD7","schema_version":"1.0","canonical_sha256":"9752e1647f611087e534c376a4a42314e359d0107e844fa5b9cd9670e468a8b5","source":{"kind":"arxiv","id":"2605.13184","version":1},"attestation_state":"computed","paper":{"title":"Magnesium-graphene interphase boundaries created by high-pressure torsion enhance hydrogen storage kinetics:Mechanisms and significance of activation energy and frequency factor","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"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.","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Anthony Alhayek, Baran Bidyut Saha, Kaveh Edalati, Marc Novelli, Md. Amirul Islam, Payam Edalati, Runchen Zhou, Shivam Dangwal, Thierry Grosdidier","submitted_at":"2026-05-13T08:42:41Z","abstract_excerpt":"A strategy to overcome sluggish hydrogenation/dehydrogenation of magnesium is demonstrated by creating magnesium-graphene interphase boundaries via high-pressure torsion (HPT). HPT reduces the grain size of pure magnesium from 1 mm to 850 nm, with 70% of grain boundaries having high misorientation angles. Graphene addition leads to even finer grain sizes of 10-500 nm with a bimodal morphology. The magnesium-graphene composites exhibit superior kinetics at 623 K while maintaining high air resistance. Kinetic modeling reveals that the rate-controlling mechanism transits from interfacial reaction"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":true,"formal_links_present":false},"canonical_record":{"source":{"id":"2605.13184","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-05-13T08:42:41Z","cross_cats_sorted":[],"title_canon_sha256":"34e193ae97df5612ace23cc5ecdd974faac1803db21180453c01907e29d6e07e","abstract_canon_sha256":"b082804415fd64d1d460dd4e929dc83ae576506b37dc65dad65b79b53f8f1415"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:08:56.300886Z","signature_b64":"O11JpV03bMIlQwagjFkohI6a6Tn7qBJqKvsqjlV2kWhJN+q3QpRyJPJLh6wZf6QH5QBedEibDK+Zq9GVLp7mDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9752e1647f611087e534c376a4a42314e359d0107e844fa5b9cd9670e468a8b5","last_reissued_at":"2026-05-18T03:08:56.300325Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:08:56.300325Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Magnesium-graphene interphase boundaries created by high-pressure torsion enhance hydrogen storage kinetics:Mechanisms and significance of activation energy and frequency factor","license":"http://creativecommons.org/licenses/by-nc-nd/4.0/","headline":"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.","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Anthony Alhayek, Baran Bidyut Saha, Kaveh Edalati, Marc Novelli, Md. Amirul Islam, Payam Edalati, Runchen Zhou, Shivam Dangwal, Thierry Grosdidier","submitted_at":"2026-05-13T08:42:41Z","abstract_excerpt":"A strategy to overcome sluggish hydrogenation/dehydrogenation of magnesium is demonstrated by creating magnesium-graphene interphase boundaries via high-pressure torsion (HPT). HPT reduces the grain size of pure magnesium from 1 mm to 850 nm, with 70% of grain boundaries having high misorientation angles. Graphene addition leads to even finer grain sizes of 10-500 nm with a bimodal morphology. The magnesium-graphene composites exhibit superior kinetics at 623 K while maintaining high air resistance. Kinetic modeling reveals that the rate-controlling mechanism transits from interfacial reaction"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"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.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"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.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"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.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"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.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"6b6852b4673eaf4d3796d2758d59680bca4964849aed86303724cc0be422d294"},"source":{"id":"2605.13184","kind":"arxiv","version":1},"verdict":{"id":"1dc2fd1d-3f6a-4457-bc19-25427fe8b590","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:59:26.060630Z","strongest_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.","one_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.","pipeline_version":"pith-pipeline@v0.9.0","weakest_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.","pith_extraction_headline":"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."},"references":{"count":63,"sample":[{"doi":"","year":2021,"title":"Hydrogen energy systems: a critical review of technologies, applications, trends and challenges","work_id":"15325d6f-d2bb-4b61-ac0b-a6caf7c520db","ref_index":1,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2020,"title":"Materials for hydrogen -based energy storage - past, recent progress and future outlook","work_id":"e5058047-0cce-431d-9e88-2825aa68b91a","ref_index":2,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2019,"title":"Application of hydrides in hydrogen storage and compression: achievements, outlook and perspectives","work_id":"22d25f6e-d515-4684-8ea5-6ea9fe39ffff","ref_index":3,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2019,"title":"Magnesium based materials for hydrogen based energy storage: past, present and future","work_id":"04c04763-5cff-41c6-9f60-a8a14222057e","ref_index":4,"cited_arxiv_id":"","is_internal_anchor":false},{"doi":"","year":2022,"title":"Magnesium - and intermetallic alloys -based hydrides for energy storage: modelling, synthesis and properties","work_id":"3db15abc-6174-44a3-b514-3fb58546e89d","ref_index":5,"cited_arxiv_id":"","is_internal_anchor":false}],"resolved_work":63,"snapshot_sha256":"6e16c5786e5a6add413e71eeb1efd7e2f89d48c33cb1cae9209990146ad29808","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"aliases":[{"alias_kind":"arxiv","alias_value":"2605.13184","created_at":"2026-05-18T03:08:56.300408+00:00"},{"alias_kind":"arxiv_version","alias_value":"2605.13184v1","created_at":"2026-05-18T03:08:56.300408+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2605.13184","created_at":"2026-05-18T03:08:56.300408+00:00"},{"alias_kind":"pith_short_12","alias_value":"S5JOCZD7MEII","created_at":"2026-05-18T12:33:37.589309+00:00"},{"alias_kind":"pith_short_16","alias_value":"S5JOCZD7MEIIPZJU","created_at":"2026-05-18T12:33:37.589309+00:00"},{"alias_kind":"pith_short_8","alias_value":"S5JOCZD7","created_at":"2026-05-18T12:33:37.589309+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT","json":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT.json","graph_json":"https://pith.science/api/pith-number/S5JOCZD7MEIIPZJUYN3KJJBDCT/graph.json","events_json":"https://pith.science/api/pith-number/S5JOCZD7MEIIPZJUYN3KJJBDCT/events.json","paper":"https://pith.science/paper/S5JOCZD7"},"agent_actions":{"view_html":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT","download_json":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT.json","view_paper":"https://pith.science/paper/S5JOCZD7","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2605.13184&json=true","fetch_graph":"https://pith.science/api/pith-number/S5JOCZD7MEIIPZJUYN3KJJBDCT/graph.json","fetch_events":"https://pith.science/api/pith-number/S5JOCZD7MEIIPZJUYN3KJJBDCT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT/action/storage_attestation","attest_author":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT/action/author_attestation","sign_citation":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT/action/citation_signature","submit_replication":"https://pith.science/pith/S5JOCZD7MEIIPZJUYN3KJJBDCT/action/replication_record"}},"created_at":"2026-05-18T03:08:56.300408+00:00","updated_at":"2026-05-18T03:08:56.300408+00:00"}