{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:G2XRAM23XAH3XHGC4TJC7Y7PHE","short_pith_number":"pith:G2XRAM23","canonical_record":{"source":{"id":"1903.10576","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-03-11T22:21:07Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"title_canon_sha256":"a37edbd229e9c8769fc9c8694b1d91b8ad27c2a53647f938922f6a38c38a26b4","abstract_canon_sha256":"0f6dc8f859c89deecc10c41fdba777c543b991f37bfa8be5837710882661d361"},"schema_version":"1.0"},"canonical_sha256":"36af10335bb80fbb9cc2e4d22fe3ef393fa8ad03bd20e0a373d80a904e31bb3d","source":{"kind":"arxiv","id":"1903.10576","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.10576","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"arxiv_version","alias_value":"1903.10576v1","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.10576","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_12","alias_value":"G2XRAM23XAH3","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_16","alias_value":"G2XRAM23XAH3XHGC","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_8","alias_value":"G2XRAM23","created_at":"2026-07-05T02:28:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:G2XRAM23XAH3XHGC4TJC7Y7PHE","target":"record","payload":{"canonical_record":{"source":{"id":"1903.10576","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-03-11T22:21:07Z","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"title_canon_sha256":"a37edbd229e9c8769fc9c8694b1d91b8ad27c2a53647f938922f6a38c38a26b4","abstract_canon_sha256":"0f6dc8f859c89deecc10c41fdba777c543b991f37bfa8be5837710882661d361"},"schema_version":"1.0"},"canonical_sha256":"36af10335bb80fbb9cc2e4d22fe3ef393fa8ad03bd20e0a373d80a904e31bb3d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:28:03.634622Z","signature_b64":"qQwNZJIV6GbfNbSJFLy9mV2Lh6uakZZil9Fu1qxU8oVrE8da6Iw3V0EjkgOdZv4a6hrYegBZaFxhTjAoCNbXCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"36af10335bb80fbb9cc2e4d22fe3ef393fa8ad03bd20e0a373d80a904e31bb3d","last_reissued_at":"2026-07-05T02:28:03.634170Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:28:03.634170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1903.10576","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:28:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"K8ZDHAXr4x4ag/OOVFZ5PtJH62bGKqqoQRgRpxgWrCivMP/D+i4MFxZ41yGNq7yhkIWZkmK2WbmbMf7adF1xCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T03:07:26.727256Z"},"content_sha256":"2a2c554701aff75a91f6418334d52b99aa491f55875c79c3da1fd1820bc5432e","schema_version":"1.0","event_id":"sha256:2a2c554701aff75a91f6418334d52b99aa491f55875c79c3da1fd1820bc5432e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:G2XRAM23XAH3XHGC4TJC7Y7PHE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Rational Strain Engineering in Delafossite Oxides for Highly Efficient Hydrogen Evolution Catalysis in Acidic Media","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"primary_cat":"physics.chem-ph","authors_text":"Anna Fontcuberta I Morral, Bettina V. Lotsch, Christina Scheu, Daniel Weber, Esther Alarcon-Llado, Filip Podjaski, Frederik Haase, Gunther Richter, Leo Diehl, Roland Eger, Siyuan Zhang, Viola Duppel","submitted_at":"2019-03-11T22:21:07Z","abstract_excerpt":"The rational design of hydrogen evolution reaction (HER) electrocatalysts which are competitive with platinum is an outstanding challenge to make power-to-gas technologies economically viable. Here, we introduce the delafossites PdCrO$_2$, PdCoO$_2$ and PtCoO$_2$ as a new family of electrocatalysts for the HER in acidic media. We show that in PdCoO$_2$ the inherently strained Pd metal sublattice acts as a pseudomorphic template for the growth of a strained (by +2.3%) Pd rich capping layer under reductive conditions. The surface modification continuously improves the electrocatalytic activity b"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.10576","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1903.10576/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T02:28:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0hON4Kq1GY7cLLl9iFZriqH8rsVnWmesRs8UYJyZsqq+Wi4OeIzWn1iV+B64QITF9VmmVLJ373hWb5L2uXOaAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T03:07:26.727653Z"},"content_sha256":"761163aafbd479de6ffbd007c63c3b37ddcad0cb74bb08f5c8670b85dcbafa01","schema_version":"1.0","event_id":"sha256:761163aafbd479de6ffbd007c63c3b37ddcad0cb74bb08f5c8670b85dcbafa01"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/bundle.json","state_url":"https://pith.science/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-07-10T03:07:26Z","links":{"resolver":"https://pith.science/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE","bundle":"https://pith.science/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/bundle.json","state":"https://pith.science/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/G2XRAM23XAH3XHGC4TJC7Y7PHE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:G2XRAM23XAH3XHGC4TJC7Y7PHE","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"0f6dc8f859c89deecc10c41fdba777c543b991f37bfa8be5837710882661d361","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-03-11T22:21:07Z","title_canon_sha256":"a37edbd229e9c8769fc9c8694b1d91b8ad27c2a53647f938922f6a38c38a26b4"},"schema_version":"1.0","source":{"id":"1903.10576","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1903.10576","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"arxiv_version","alias_value":"1903.10576v1","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1903.10576","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_12","alias_value":"G2XRAM23XAH3","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_16","alias_value":"G2XRAM23XAH3XHGC","created_at":"2026-07-05T02:28:03Z"},{"alias_kind":"pith_short_8","alias_value":"G2XRAM23","created_at":"2026-07-05T02:28:03Z"}],"graph_snapshots":[{"event_id":"sha256:761163aafbd479de6ffbd007c63c3b37ddcad0cb74bb08f5c8670b85dcbafa01","target":"graph","created_at":"2026-07-05T02:28:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1903.10576/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The rational design of hydrogen evolution reaction (HER) electrocatalysts which are competitive with platinum is an outstanding challenge to make power-to-gas technologies economically viable. Here, we introduce the delafossites PdCrO$_2$, PdCoO$_2$ and PtCoO$_2$ as a new family of electrocatalysts for the HER in acidic media. We show that in PdCoO$_2$ the inherently strained Pd metal sublattice acts as a pseudomorphic template for the growth of a strained (by +2.3%) Pd rich capping layer under reductive conditions. The surface modification continuously improves the electrocatalytic activity b","authors_text":"Anna Fontcuberta I Morral, Bettina V. Lotsch, Christina Scheu, Daniel Weber, Esther Alarcon-Llado, Filip Podjaski, Frederik Haase, Gunther Richter, Leo Diehl, Roland Eger, Siyuan Zhang, Viola Duppel","cross_cats":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-03-11T22:21:07Z","title":"Rational Strain Engineering in Delafossite Oxides for Highly Efficient Hydrogen Evolution Catalysis in Acidic Media"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1903.10576","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:2a2c554701aff75a91f6418334d52b99aa491f55875c79c3da1fd1820bc5432e","target":"record","created_at":"2026-07-05T02:28:03Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"0f6dc8f859c89deecc10c41fdba777c543b991f37bfa8be5837710882661d361","cross_cats_sorted":["cond-mat.mes-hall","cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2019-03-11T22:21:07Z","title_canon_sha256":"a37edbd229e9c8769fc9c8694b1d91b8ad27c2a53647f938922f6a38c38a26b4"},"schema_version":"1.0","source":{"id":"1903.10576","kind":"arxiv","version":1}},"canonical_sha256":"36af10335bb80fbb9cc2e4d22fe3ef393fa8ad03bd20e0a373d80a904e31bb3d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"36af10335bb80fbb9cc2e4d22fe3ef393fa8ad03bd20e0a373d80a904e31bb3d","first_computed_at":"2026-07-05T02:28:03.634170Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:28:03.634170Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"qQwNZJIV6GbfNbSJFLy9mV2Lh6uakZZil9Fu1qxU8oVrE8da6Iw3V0EjkgOdZv4a6hrYegBZaFxhTjAoCNbXCA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:28:03.634622Z","signed_message":"canonical_sha256_bytes"},"source_id":"1903.10576","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a2c554701aff75a91f6418334d52b99aa491f55875c79c3da1fd1820bc5432e","sha256:761163aafbd479de6ffbd007c63c3b37ddcad0cb74bb08f5c8670b85dcbafa01"],"state_sha256":"addd11073c843a4588815f4f8c71c594073895dfc20b9879cdd1fc3b96ede075"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nk9t8v0Mwri8iFc8obWuzx6s1QjLSjNtZ9I0aGMxJHiQs4cKhrZy+cHJuO7rQC2wiAel9nt4zbsdBslbYpIQAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T03:07:26.729585Z","bundle_sha256":"410b94fef044157b33f7567aa366df18d3b22f435e6b6d271731dd3fea6c578f"}}