{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:SSFG4FO5BUA6VINB3DYJKBK4QE","short_pith_number":"pith:SSFG4FO5","canonical_record":{"source":{"id":"2602.00433","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-01-31T01:07:12Z","cross_cats_sorted":[],"title_canon_sha256":"5463e495a8a2178a127a7657bd4bb50bb05dcb9227431d9e7b415efbe9643a03","abstract_canon_sha256":"10ea40ddca59656e0f6599dffaa6ca344440dc76cbf06ebe2f7ccb15fc3a4ba0"},"schema_version":"1.0"},"canonical_sha256":"948a6e15dd0d01eaa1a1d8f095055c811af3d0a75e7f6956105858d0dc36abf4","source":{"kind":"arxiv","id":"2602.00433","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.00433","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"arxiv_version","alias_value":"2602.00433v2","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.00433","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_12","alias_value":"SSFG4FO5BUA6","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_16","alias_value":"SSFG4FO5BUA6VINB","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_8","alias_value":"SSFG4FO5","created_at":"2026-07-29T00:24:35Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:SSFG4FO5BUA6VINB3DYJKBK4QE","target":"record","payload":{"canonical_record":{"source":{"id":"2602.00433","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-01-31T01:07:12Z","cross_cats_sorted":[],"title_canon_sha256":"5463e495a8a2178a127a7657bd4bb50bb05dcb9227431d9e7b415efbe9643a03","abstract_canon_sha256":"10ea40ddca59656e0f6599dffaa6ca344440dc76cbf06ebe2f7ccb15fc3a4ba0"},"schema_version":"1.0"},"canonical_sha256":"948a6e15dd0d01eaa1a1d8f095055c811af3d0a75e7f6956105858d0dc36abf4","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-29T00:24:35.836894Z","signature_b64":"FfBQ3OAorQK/1DNrgrrQGlbXaqgMNFpBJ82ELe1aoZTj9E5msBXt/Uyq4yZ2gT8/HGw15b6Y1uWftdJ6yaIrBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"948a6e15dd0d01eaa1a1d8f095055c811af3d0a75e7f6956105858d0dc36abf4","last_reissued_at":"2026-07-29T00:24:35.835964Z","signature_status":"signed_v1","first_computed_at":"2026-07-29T00:24:35.835964Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2602.00433","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-29T00:24:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vq+7TymVmPTptnh5r75+SV+bxGuZVmL7/WkPjqwK+iFD1a10b8JitsGQyUMznPqL2tqcEOt7+ucdwAjJdpdUBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T01:35:27.111786Z"},"content_sha256":"ae9bc23c361442f709a428c1576e4a55ea0f56b88e91ad1f4dd5a41b657c3dcc","schema_version":"1.0","event_id":"sha256:ae9bc23c361442f709a428c1576e4a55ea0f56b88e91ad1f4dd5a41b657c3dcc"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:SSFG4FO5BUA6VINB3DYJKBK4QE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"In situ Gas-Cell Electron Microscopy Reveals Pressure-Selected Restructuring Pathways in AuRu Ammonia Catalysts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Amy S. McKeown-Green, Andrew Barnum, Cedric Lim, Colin Ophus, Frank Abild-Pedersen, Jennifer A. Dionne, Lin Yuan, Parivash Moradifar, Robert Sinclair, Zisheng Zhang","submitted_at":"2026-01-31T01:07:12Z","abstract_excerpt":"Bimetallic catalysts provide new routes toward sustainable ammonia synthesis, but the nanoscale structural dynamics under reaction-relevant conditions remain poorly understood. Here, we combine in situ gas-cell and multimodal electron microscopy to determine how temperature, gas pressure, and chemistry select among distinct restructuring pathways in AuRu nanocrystal catalysts. Initially, the AuRu nanocrystals form polycrystalline face-centered cubic (FCC) alloys with Au/Ru intermixing. Elevated temperature ($\\geq 350~^\\circ$C) induces intraparticle phase segregation into distinct Au-rich (FCC)"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.00433","kind":"arxiv","version":2},"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/2602.00433/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":"2026-07-29T00:24:35Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"lKJ1R2rqYQbnbXxULV0absWbpxvUG+u1f45ILajwoCnbx2oqAZn1GkoetsX1jy9cmIzBmQD0P0guo891pbxYBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-20T01:35:27.112307Z"},"content_sha256":"23aeb795304ed13dd5feac2756b547fd06d1c7e5d76d446b63651a1f0cd7f8e8","schema_version":"1.0","event_id":"sha256:23aeb795304ed13dd5feac2756b547fd06d1c7e5d76d446b63651a1f0cd7f8e8"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/bundle.json","state_url":"https://pith.science/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/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":"2026-08-20T01:35:27Z","links":{"resolver":"https://pith.science/pith/SSFG4FO5BUA6VINB3DYJKBK4QE","bundle":"https://pith.science/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/bundle.json","state":"https://pith.science/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SSFG4FO5BUA6VINB3DYJKBK4QE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:SSFG4FO5BUA6VINB3DYJKBK4QE","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":"10ea40ddca59656e0f6599dffaa6ca344440dc76cbf06ebe2f7ccb15fc3a4ba0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-01-31T01:07:12Z","title_canon_sha256":"5463e495a8a2178a127a7657bd4bb50bb05dcb9227431d9e7b415efbe9643a03"},"schema_version":"1.0","source":{"id":"2602.00433","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.00433","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"arxiv_version","alias_value":"2602.00433v2","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.00433","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_12","alias_value":"SSFG4FO5BUA6","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_16","alias_value":"SSFG4FO5BUA6VINB","created_at":"2026-07-29T00:24:35Z"},{"alias_kind":"pith_short_8","alias_value":"SSFG4FO5","created_at":"2026-07-29T00:24:35Z"}],"graph_snapshots":[{"event_id":"sha256:23aeb795304ed13dd5feac2756b547fd06d1c7e5d76d446b63651a1f0cd7f8e8","target":"graph","created_at":"2026-07-29T00:24:35Z","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/2602.00433/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Bimetallic catalysts provide new routes toward sustainable ammonia synthesis, but the nanoscale structural dynamics under reaction-relevant conditions remain poorly understood. Here, we combine in situ gas-cell and multimodal electron microscopy to determine how temperature, gas pressure, and chemistry select among distinct restructuring pathways in AuRu nanocrystal catalysts. Initially, the AuRu nanocrystals form polycrystalline face-centered cubic (FCC) alloys with Au/Ru intermixing. Elevated temperature ($\\geq 350~^\\circ$C) induces intraparticle phase segregation into distinct Au-rich (FCC)","authors_text":"Amy S. McKeown-Green, Andrew Barnum, Cedric Lim, Colin Ophus, Frank Abild-Pedersen, Jennifer A. Dionne, Lin Yuan, Parivash Moradifar, Robert Sinclair, Zisheng Zhang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-01-31T01:07:12Z","title":"In situ Gas-Cell Electron Microscopy Reveals Pressure-Selected Restructuring Pathways in AuRu Ammonia Catalysts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.00433","kind":"arxiv","version":2},"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:ae9bc23c361442f709a428c1576e4a55ea0f56b88e91ad1f4dd5a41b657c3dcc","target":"record","created_at":"2026-07-29T00:24:35Z","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":"10ea40ddca59656e0f6599dffaa6ca344440dc76cbf06ebe2f7ccb15fc3a4ba0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2026-01-31T01:07:12Z","title_canon_sha256":"5463e495a8a2178a127a7657bd4bb50bb05dcb9227431d9e7b415efbe9643a03"},"schema_version":"1.0","source":{"id":"2602.00433","kind":"arxiv","version":2}},"canonical_sha256":"948a6e15dd0d01eaa1a1d8f095055c811af3d0a75e7f6956105858d0dc36abf4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"948a6e15dd0d01eaa1a1d8f095055c811af3d0a75e7f6956105858d0dc36abf4","first_computed_at":"2026-07-29T00:24:35.835964Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-29T00:24:35.835964Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FfBQ3OAorQK/1DNrgrrQGlbXaqgMNFpBJ82ELe1aoZTj9E5msBXt/Uyq4yZ2gT8/HGw15b6Y1uWftdJ6yaIrBQ==","signature_status":"signed_v1","signed_at":"2026-07-29T00:24:35.836894Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.00433","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ae9bc23c361442f709a428c1576e4a55ea0f56b88e91ad1f4dd5a41b657c3dcc","sha256:23aeb795304ed13dd5feac2756b547fd06d1c7e5d76d446b63651a1f0cd7f8e8"],"state_sha256":"46e910207c8a4d869aefeac032ef2e795268a5502272a28d6498795b360ef408"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"a/1mO0/bbWhLcGyE/G8qfLMSCE0AdsZEOuRz9PQvjwK2AVyN4wjBhlaBisdl0JkpMd9HD0+SZXrAEB4Ul7w3AA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-20T01:35:27.118122Z","bundle_sha256":"96ecf83591f2b11bdc517a9f16df480206bcf8762d8cc0e3b091df0046af95c4"}}