{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:L5FAH5ZQPE54UV3F5PYOLXAMGZ","short_pith_number":"pith:L5FAH5ZQ","canonical_record":{"source":{"id":"1303.3308","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2013-03-13T23:17:07Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"498d3af7f74b4365253de19f03a7aeeae044d16c353a95eba3e4405a58f55f31","abstract_canon_sha256":"8f530088cd5e6d9cb86a4bd577481c7d6aa18741e39d742ebf3491ce554425d3"},"schema_version":"1.0"},"canonical_sha256":"5f4a03f730793bca5765ebf0e5dc0c366991dc60b37c0888589feadc9b77f7a5","source":{"kind":"arxiv","id":"1303.3308","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3308","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3308v2","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3308","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"pith_short_12","alias_value":"L5FAH5ZQPE54","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"L5FAH5ZQPE54UV3F","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"L5FAH5ZQ","created_at":"2026-05-18T12:27:51Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:L5FAH5ZQPE54UV3F5PYOLXAMGZ","target":"record","payload":{"canonical_record":{"source":{"id":"1303.3308","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2013-03-13T23:17:07Z","cross_cats_sorted":["cond-mat.mtrl-sci"],"title_canon_sha256":"498d3af7f74b4365253de19f03a7aeeae044d16c353a95eba3e4405a58f55f31","abstract_canon_sha256":"8f530088cd5e6d9cb86a4bd577481c7d6aa18741e39d742ebf3491ce554425d3"},"schema_version":"1.0"},"canonical_sha256":"5f4a03f730793bca5765ebf0e5dc0c366991dc60b37c0888589feadc9b77f7a5","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:25:04.018399Z","signature_b64":"NOF43j2Iss3z6dOWxDszqek5ySzJAnMPYn8skYLO04CqGShPPn2VOAonL5o5+cTFKwXJ64crJYT1tkAf+gMOCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5f4a03f730793bca5765ebf0e5dc0c366991dc60b37c0888589feadc9b77f7a5","last_reissued_at":"2026-05-18T03:25:04.017942Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:25:04.017942Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1303.3308","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":"2026-05-18T03:25:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wCsWS9ac9uy1zmwmTT5Z9yy6MlxdKddDPer5juwoWQgH6N7FcztxbEG/apnUmiIFVCO3oct423elm5ol8hfJCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:00:59.731026Z"},"content_sha256":"77d23948d91197c0d3fc57af6fba5f315e5b668f61fb67e85a38c294774c40b6","schema_version":"1.0","event_id":"sha256:77d23948d91197c0d3fc57af6fba5f315e5b668f61fb67e85a38c294774c40b6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:L5FAH5ZQPE54UV3F5PYOLXAMGZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Ni-Fe Layered Double Hydroxide-Carbon Nanotube Complex for Water Oxidation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"physics.chem-ph","authors_text":"Fei Wei, Hailiang Wang, Hongjie Dai, Jian Wang, Jigang Zhou, Justin Zachary Wu, Ming Gong, Tom Regier, Yanguang Li, Yongye Liang","submitted_at":"2013-03-13T23:17:07Z","abstract_excerpt":"Highly active, durable and cost-effective electrocatalysts for water oxidation to evolve oxygen gas hold a key to a range of renewable energy solutions including water splitting and rechargeable metal-air batteries. Here, we report the synthesis of ultrathin nickel iron layered double hydroxide nanoplates on mildly oxidized multi-walled carbon nanotubes. Incorporation of Fe into the nickel hydroxide induced the formation of NiFe-layered double hydroxide. The nanoplates were covalently attached to a network of nanotubes, affording excellent electrical wiring to the nanoplates. The ultra-thin Ni"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3308","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":""},"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":"2026-05-18T03:25:04Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cRYaI3o+ADS9gY/TQcBoPtLaYy3CrA9IQKUNHMFcXDsYjvLdMfT2YAvbbjcYx2Lj7+cESWoCTyJDZHbWyiiGDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T00:00:59.731630Z"},"content_sha256":"81d9781c5fd53fb21e7433634f6d0a979c3bbbf0a9494d2739877f40711b9d8d","schema_version":"1.0","event_id":"sha256:81d9781c5fd53fb21e7433634f6d0a979c3bbbf0a9494d2739877f40711b9d8d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/bundle.json","state_url":"https://pith.science/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/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":"2026-05-26T00:00:59Z","links":{"resolver":"https://pith.science/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ","bundle":"https://pith.science/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/bundle.json","state":"https://pith.science/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/L5FAH5ZQPE54UV3F5PYOLXAMGZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:L5FAH5ZQPE54UV3F5PYOLXAMGZ","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":"8f530088cd5e6d9cb86a4bd577481c7d6aa18741e39d742ebf3491ce554425d3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2013-03-13T23:17:07Z","title_canon_sha256":"498d3af7f74b4365253de19f03a7aeeae044d16c353a95eba3e4405a58f55f31"},"schema_version":"1.0","source":{"id":"1303.3308","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1303.3308","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"arxiv_version","alias_value":"1303.3308v2","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1303.3308","created_at":"2026-05-18T03:25:04Z"},{"alias_kind":"pith_short_12","alias_value":"L5FAH5ZQPE54","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_16","alias_value":"L5FAH5ZQPE54UV3F","created_at":"2026-05-18T12:27:51Z"},{"alias_kind":"pith_short_8","alias_value":"L5FAH5ZQ","created_at":"2026-05-18T12:27:51Z"}],"graph_snapshots":[{"event_id":"sha256:81d9781c5fd53fb21e7433634f6d0a979c3bbbf0a9494d2739877f40711b9d8d","target":"graph","created_at":"2026-05-18T03:25:04Z","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"},"paper":{"abstract_excerpt":"Highly active, durable and cost-effective electrocatalysts for water oxidation to evolve oxygen gas hold a key to a range of renewable energy solutions including water splitting and rechargeable metal-air batteries. Here, we report the synthesis of ultrathin nickel iron layered double hydroxide nanoplates on mildly oxidized multi-walled carbon nanotubes. Incorporation of Fe into the nickel hydroxide induced the formation of NiFe-layered double hydroxide. The nanoplates were covalently attached to a network of nanotubes, affording excellent electrical wiring to the nanoplates. The ultra-thin Ni","authors_text":"Fei Wei, Hailiang Wang, Hongjie Dai, Jian Wang, Jigang Zhou, Justin Zachary Wu, Ming Gong, Tom Regier, Yanguang Li, Yongye Liang","cross_cats":["cond-mat.mtrl-sci"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2013-03-13T23:17:07Z","title":"A Ni-Fe Layered Double Hydroxide-Carbon Nanotube Complex for Water Oxidation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.3308","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":"sha256:77d23948d91197c0d3fc57af6fba5f315e5b668f61fb67e85a38c294774c40b6","target":"record","created_at":"2026-05-18T03:25:04Z","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":"8f530088cd5e6d9cb86a4bd577481c7d6aa18741e39d742ebf3491ce554425d3","cross_cats_sorted":["cond-mat.mtrl-sci"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2013-03-13T23:17:07Z","title_canon_sha256":"498d3af7f74b4365253de19f03a7aeeae044d16c353a95eba3e4405a58f55f31"},"schema_version":"1.0","source":{"id":"1303.3308","kind":"arxiv","version":2}},"canonical_sha256":"5f4a03f730793bca5765ebf0e5dc0c366991dc60b37c0888589feadc9b77f7a5","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5f4a03f730793bca5765ebf0e5dc0c366991dc60b37c0888589feadc9b77f7a5","first_computed_at":"2026-05-18T03:25:04.017942Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:04.017942Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NOF43j2Iss3z6dOWxDszqek5ySzJAnMPYn8skYLO04CqGShPPn2VOAonL5o5+cTFKwXJ64crJYT1tkAf+gMOCg==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:04.018399Z","signed_message":"canonical_sha256_bytes"},"source_id":"1303.3308","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:77d23948d91197c0d3fc57af6fba5f315e5b668f61fb67e85a38c294774c40b6","sha256:81d9781c5fd53fb21e7433634f6d0a979c3bbbf0a9494d2739877f40711b9d8d"],"state_sha256":"de31fd9c4bc6e095f2f17de6da273f88ff45b6c7173664bb43b740483185da15"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"4waMn9JwiKtaRI/YIeZYh/LOcHJhKtwDCsNyFBaARUwjzL1Oy8nNfWmEdfFaJJK4ljx+OOZ0ZJk99ean/plWDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T00:00:59.735041Z","bundle_sha256":"c8573f664b939ed2942f42761efe40966f7af6afa17ddca7d049ca3e2d787239"}}