{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:RMONVPILN4UJJ5IWR3DXVCY6OC","short_pith_number":"pith:RMONVPIL","canonical_record":{"source":{"id":"1606.04834","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-15T16:08:15Z","cross_cats_sorted":[],"title_canon_sha256":"d28e975e3070af0e091c388f5522edc4eec5ce51b198328f718da26da977511c","abstract_canon_sha256":"e43f38237f2975d1a5a54ca0e930c4e944c0ce160de73ff5124caf7f2708f321"},"schema_version":"1.0"},"canonical_sha256":"8b1cdabd0b6f2894f5168ec77a8b1e70a1d800dcf436935f734e9f8928db7293","source":{"kind":"arxiv","id":"1606.04834","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04834","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04834v1","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04834","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"pith_short_12","alias_value":"RMONVPILN4UJ","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RMONVPILN4UJJ5IW","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RMONVPIL","created_at":"2026-05-18T12:30:41Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:RMONVPILN4UJJ5IWR3DXVCY6OC","target":"record","payload":{"canonical_record":{"source":{"id":"1606.04834","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-15T16:08:15Z","cross_cats_sorted":[],"title_canon_sha256":"d28e975e3070af0e091c388f5522edc4eec5ce51b198328f718da26da977511c","abstract_canon_sha256":"e43f38237f2975d1a5a54ca0e930c4e944c0ce160de73ff5124caf7f2708f321"},"schema_version":"1.0"},"canonical_sha256":"8b1cdabd0b6f2894f5168ec77a8b1e70a1d800dcf436935f734e9f8928db7293","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:12:23.285492Z","signature_b64":"zTn0xHAsPafiOGXUoSRt63tUBKdyHsWB2CGLtF5/G5ym7Tx33chAlFPXL5S59AtkPaDsNkH6j/q3Dxbfrf7kDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8b1cdabd0b6f2894f5168ec77a8b1e70a1d800dcf436935f734e9f8928db7293","last_reissued_at":"2026-05-18T01:12:23.285152Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:12:23.285152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.04834","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":"2026-05-18T01:12:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fcygwOxaTFfwzHaqre6LxGeDvJyec0yWqdPv3IMyG+B7ScRQaft+OBFgc8vZJ05RoktnUQbS5vy0jf309UckCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:16:06.876228Z"},"content_sha256":"edbcafa05c252516134d6c1322a50f32245a0b4f9f5c8b22966e7321fd403f7c","schema_version":"1.0","event_id":"sha256:edbcafa05c252516134d6c1322a50f32245a0b4f9f5c8b22966e7321fd403f7c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:RMONVPILN4UJJ5IWR3DXVCY6OC","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"d2, d3, and d4 M3C2 Transition Metal Carbides (MXenes) as Catalysts for CO2 Conversion into Hydrocarbon Fuels: A Mechanistic and Pre-dictive DFT Study","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"Chenghua Sun, Douglas R. MacFarlane, Luis Miguel Azofra, Neng Li, Xingzhu Chen, Xiujian Zhao","submitted_at":"2016-06-15T16:08:15Z","abstract_excerpt":"The functioning of 2D d2, d3, and d4 transition metal carbides as CO2 conversion catalysts has been proved by well resolved density functional theory (DFT) and DFT+U theoretical calculations. Whilst MXenes from the d2 series (M = Ti, Zr, and Hf) have demonstrated active behaviors for the capture of CO2, the V3C2, Nb3C2, Cr3C2, and Mo3C2 materials exhibit the most promising results for their application in the selective CO2 conversion into CH4, with limiting reaction energies of 1.55, 1.75, 0.69, and 1.24 eV, respectively, at DFT+U computational level plus explicit DFT-D3 dispersion corrections"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04834","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":"2026-05-18T01:12:23Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"GoOoSwgYRzuQTourIKMNoVK3SgOzAYfeIOcOnYv1GQewIl1Oi2CeIsrUX4xoapvRYw21GoCRs9yIr+9FaelQBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T07:16:06.876867Z"},"content_sha256":"effb156656f8d57feb07dba14d8a8ed1e5eab826091f0dd48153c5375d28e516","schema_version":"1.0","event_id":"sha256:effb156656f8d57feb07dba14d8a8ed1e5eab826091f0dd48153c5375d28e516"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/bundle.json","state_url":"https://pith.science/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/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":"2026-05-30T07:16:06Z","links":{"resolver":"https://pith.science/pith/RMONVPILN4UJJ5IWR3DXVCY6OC","bundle":"https://pith.science/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/bundle.json","state":"https://pith.science/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RMONVPILN4UJJ5IWR3DXVCY6OC/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:RMONVPILN4UJJ5IWR3DXVCY6OC","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":"e43f38237f2975d1a5a54ca0e930c4e944c0ce160de73ff5124caf7f2708f321","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-15T16:08:15Z","title_canon_sha256":"d28e975e3070af0e091c388f5522edc4eec5ce51b198328f718da26da977511c"},"schema_version":"1.0","source":{"id":"1606.04834","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.04834","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"arxiv_version","alias_value":"1606.04834v1","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.04834","created_at":"2026-05-18T01:12:23Z"},{"alias_kind":"pith_short_12","alias_value":"RMONVPILN4UJ","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_16","alias_value":"RMONVPILN4UJJ5IW","created_at":"2026-05-18T12:30:41Z"},{"alias_kind":"pith_short_8","alias_value":"RMONVPIL","created_at":"2026-05-18T12:30:41Z"}],"graph_snapshots":[{"event_id":"sha256:effb156656f8d57feb07dba14d8a8ed1e5eab826091f0dd48153c5375d28e516","target":"graph","created_at":"2026-05-18T01:12:23Z","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":"The functioning of 2D d2, d3, and d4 transition metal carbides as CO2 conversion catalysts has been proved by well resolved density functional theory (DFT) and DFT+U theoretical calculations. Whilst MXenes from the d2 series (M = Ti, Zr, and Hf) have demonstrated active behaviors for the capture of CO2, the V3C2, Nb3C2, Cr3C2, and Mo3C2 materials exhibit the most promising results for their application in the selective CO2 conversion into CH4, with limiting reaction energies of 1.55, 1.75, 0.69, and 1.24 eV, respectively, at DFT+U computational level plus explicit DFT-D3 dispersion corrections","authors_text":"Chenghua Sun, Douglas R. MacFarlane, Luis Miguel Azofra, Neng Li, Xingzhu Chen, Xiujian Zhao","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-15T16:08:15Z","title":"d2, d3, and d4 M3C2 Transition Metal Carbides (MXenes) as Catalysts for CO2 Conversion into Hydrocarbon Fuels: A Mechanistic and Pre-dictive DFT Study"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.04834","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:edbcafa05c252516134d6c1322a50f32245a0b4f9f5c8b22966e7321fd403f7c","target":"record","created_at":"2026-05-18T01:12:23Z","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":"e43f38237f2975d1a5a54ca0e930c4e944c0ce160de73ff5124caf7f2708f321","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.mtrl-sci","submitted_at":"2016-06-15T16:08:15Z","title_canon_sha256":"d28e975e3070af0e091c388f5522edc4eec5ce51b198328f718da26da977511c"},"schema_version":"1.0","source":{"id":"1606.04834","kind":"arxiv","version":1}},"canonical_sha256":"8b1cdabd0b6f2894f5168ec77a8b1e70a1d800dcf436935f734e9f8928db7293","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8b1cdabd0b6f2894f5168ec77a8b1e70a1d800dcf436935f734e9f8928db7293","first_computed_at":"2026-05-18T01:12:23.285152Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:12:23.285152Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zTn0xHAsPafiOGXUoSRt63tUBKdyHsWB2CGLtF5/G5ym7Tx33chAlFPXL5S59AtkPaDsNkH6j/q3Dxbfrf7kDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:12:23.285492Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.04834","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:edbcafa05c252516134d6c1322a50f32245a0b4f9f5c8b22966e7321fd403f7c","sha256:effb156656f8d57feb07dba14d8a8ed1e5eab826091f0dd48153c5375d28e516"],"state_sha256":"b7bf6a479aa0d629506983193184ce5b08cdec60fd5fdcf6783de4ff3449ddff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"imscOjFz7tdSe7xaUIiUbr+YcPY45LMd0B+VhH+ORSyN3sE9xHdLdGXlL233RYKGafo86FsbBDIDwMk2HTu/AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T07:16:06.879923Z","bundle_sha256":"547eeb067f3cacf7e81ef9ca610f6e30d11fdebe705d9622518885b532f2b025"}}