{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:DWT72F763FLBRLTSS5L2E2MVEQ","short_pith_number":"pith:DWT72F76","canonical_record":{"source":{"id":"1201.5193","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-25T06:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"90e8dc309bc0eef33cffd4f3f49aaa39b07e32393dde20d7031e67b46d3b4313","abstract_canon_sha256":"d9315a7540988e37df32003a133df38112925d8371105bc0d74a78e57bbe90af"},"schema_version":"1.0"},"canonical_sha256":"1da7fd17fed95618ae729757a269952407868b06de7eaae71cbdd22c5d602126","source":{"kind":"arxiv","id":"1201.5193","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5193","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5193v1","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5193","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"pith_short_12","alias_value":"DWT72F763FLB","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"DWT72F763FLBRLTS","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"DWT72F76","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:DWT72F763FLBRLTSS5L2E2MVEQ","target":"record","payload":{"canonical_record":{"source":{"id":"1201.5193","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-25T06:34:58Z","cross_cats_sorted":[],"title_canon_sha256":"90e8dc309bc0eef33cffd4f3f49aaa39b07e32393dde20d7031e67b46d3b4313","abstract_canon_sha256":"d9315a7540988e37df32003a133df38112925d8371105bc0d74a78e57bbe90af"},"schema_version":"1.0"},"canonical_sha256":"1da7fd17fed95618ae729757a269952407868b06de7eaae71cbdd22c5d602126","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:03:55.369365Z","signature_b64":"39awRU4FBO0Ene6ub0QrHJ3IsLt4RhD9z24CwPx5KTxZPNvkL3F9S7extkxSZZ138QiDmpmwBsF+BSTJflbBCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1da7fd17fed95618ae729757a269952407868b06de7eaae71cbdd22c5d602126","last_reissued_at":"2026-05-18T04:03:55.368855Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:03:55.368855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1201.5193","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":"2026-05-18T04:03:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ploW/lqxUMrhHORuXhBMaFooEbPol3rfFvIrptmYHYoGPzeAZOFPjXY2JtbtWQBnV8sa+7LxiQ7WbxaYuVsdBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:02:03.250474Z"},"content_sha256":"f7012761f382ab48b1725e331e51bb65305e77eb07df04e8d2072db961d75df8","schema_version":"1.0","event_id":"sha256:f7012761f382ab48b1725e331e51bb65305e77eb07df04e8d2072db961d75df8"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:DWT72F763FLBRLTSS5L2E2MVEQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Covalent Hybrid of Spinel Manganese-Cobalt Oxide and Gra-phene as Advanced Oxygen Reduction Electrocatalysts","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Hailiang Wang, Hongjie Dai, Jian Wang, Jigang Zhou, Tom Regier, Yanguang Li, Yongye Liang","submitted_at":"2012-01-25T06:34:58Z","abstract_excerpt":"Through direct nanoparticle nucleation and growth on nitrogen doped, reduced graphene oxide sheets and cation substitution of spinel Co3O4 nanoparticles, a manganese-cobalt spinel MnCo2O4/graphene hybrid was developed as a highly efficient electrocatalyst for oxygen reduction reaction (ORR) in alkaline conditions. Electrochemical and X-ray near edge structure (XANES) investigations revealed that the nucleation and growth method for forming inorganic-nanocarbon hybrid results in covalent coupling between spinel oxide nanoparticles and N-doped reduced graphene oxide (N-rmGO) sheets. Carbon K-edg"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5193","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":""},"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":"2026-05-18T04:03:55Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vkHXqo2K3V+xl7JLuHozhXREEt3uHpQ1mEPowe7yBq7rliEoJ6Ir/fuIAcU/0Sbsno82CcTandtctOOY0BG0AA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T11:02:03.250829Z"},"content_sha256":"2e791b94503754fd7cb0589d2c92f79f0402cb3c06bb5a434290c1f23e17f2aa","schema_version":"1.0","event_id":"sha256:2e791b94503754fd7cb0589d2c92f79f0402cb3c06bb5a434290c1f23e17f2aa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/DWT72F763FLBRLTSS5L2E2MVEQ/bundle.json","state_url":"https://pith.science/pith/DWT72F763FLBRLTSS5L2E2MVEQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/DWT72F763FLBRLTSS5L2E2MVEQ/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":"2026-05-25T11:02:03Z","links":{"resolver":"https://pith.science/pith/DWT72F763FLBRLTSS5L2E2MVEQ","bundle":"https://pith.science/pith/DWT72F763FLBRLTSS5L2E2MVEQ/bundle.json","state":"https://pith.science/pith/DWT72F763FLBRLTSS5L2E2MVEQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/DWT72F763FLBRLTSS5L2E2MVEQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:DWT72F763FLBRLTSS5L2E2MVEQ","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":"d9315a7540988e37df32003a133df38112925d8371105bc0d74a78e57bbe90af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-25T06:34:58Z","title_canon_sha256":"90e8dc309bc0eef33cffd4f3f49aaa39b07e32393dde20d7031e67b46d3b4313"},"schema_version":"1.0","source":{"id":"1201.5193","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1201.5193","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"arxiv_version","alias_value":"1201.5193v1","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1201.5193","created_at":"2026-05-18T04:03:55Z"},{"alias_kind":"pith_short_12","alias_value":"DWT72F763FLB","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"DWT72F763FLBRLTS","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"DWT72F76","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:2e791b94503754fd7cb0589d2c92f79f0402cb3c06bb5a434290c1f23e17f2aa","target":"graph","created_at":"2026-05-18T04:03:55Z","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":"Through direct nanoparticle nucleation and growth on nitrogen doped, reduced graphene oxide sheets and cation substitution of spinel Co3O4 nanoparticles, a manganese-cobalt spinel MnCo2O4/graphene hybrid was developed as a highly efficient electrocatalyst for oxygen reduction reaction (ORR) in alkaline conditions. Electrochemical and X-ray near edge structure (XANES) investigations revealed that the nucleation and growth method for forming inorganic-nanocarbon hybrid results in covalent coupling between spinel oxide nanoparticles and N-doped reduced graphene oxide (N-rmGO) sheets. Carbon K-edg","authors_text":"Hailiang Wang, Hongjie Dai, Jian Wang, Jigang Zhou, Tom Regier, Yanguang Li, Yongye Liang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-25T06:34:58Z","title":"Covalent Hybrid of Spinel Manganese-Cobalt Oxide and Gra-phene as Advanced Oxygen Reduction Electrocatalysts"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1201.5193","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:f7012761f382ab48b1725e331e51bb65305e77eb07df04e8d2072db961d75df8","target":"record","created_at":"2026-05-18T04:03:55Z","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":"d9315a7540988e37df32003a133df38112925d8371105bc0d74a78e57bbe90af","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2012-01-25T06:34:58Z","title_canon_sha256":"90e8dc309bc0eef33cffd4f3f49aaa39b07e32393dde20d7031e67b46d3b4313"},"schema_version":"1.0","source":{"id":"1201.5193","kind":"arxiv","version":1}},"canonical_sha256":"1da7fd17fed95618ae729757a269952407868b06de7eaae71cbdd22c5d602126","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1da7fd17fed95618ae729757a269952407868b06de7eaae71cbdd22c5d602126","first_computed_at":"2026-05-18T04:03:55.368855Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:03:55.368855Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"39awRU4FBO0Ene6ub0QrHJ3IsLt4RhD9z24CwPx5KTxZPNvkL3F9S7extkxSZZ138QiDmpmwBsF+BSTJflbBCg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:03:55.369365Z","signed_message":"canonical_sha256_bytes"},"source_id":"1201.5193","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f7012761f382ab48b1725e331e51bb65305e77eb07df04e8d2072db961d75df8","sha256:2e791b94503754fd7cb0589d2c92f79f0402cb3c06bb5a434290c1f23e17f2aa"],"state_sha256":"a70163e70ca1080d285f6caf633aef55c6fd30badfee477df3f922f53e694e8c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"SXwLP9LHpCZe7nEBPa16OtV5hlqBThqFbRl32UphA3mqTZ2f8/g7+cVbn8eLjzlQUtJhvmiIJkqv4in0uljkCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T11:02:03.253152Z","bundle_sha256":"e6e7280f8380e79c0f29d501ff62f53454dd69f5790efe852dcfb6379cf65834"}}