{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:5FMCUBWJI2KA227QANPGX5IR2Y","short_pith_number":"pith:5FMCUBWJ","canonical_record":{"source":{"id":"1412.1548","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-12-04T04:00:51Z","cross_cats_sorted":[],"title_canon_sha256":"2fd1327ad07a8646b912c50f564a1a9d13719dfcdf1a42747c4ad102c04de914","abstract_canon_sha256":"702b0849baa820d083f9c3e732e5d32f762680d74b420da8f71878c4606ea451"},"schema_version":"1.0"},"canonical_sha256":"e9582a06c946940d6bf0035e6bf511d6038a9955bcfdd37ed5281b98487ef953","source":{"kind":"arxiv","id":"1412.1548","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.1548","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"arxiv_version","alias_value":"1412.1548v1","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.1548","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"pith_short_12","alias_value":"5FMCUBWJI2KA","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5FMCUBWJI2KA227Q","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5FMCUBWJ","created_at":"2026-05-18T12:28:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:5FMCUBWJI2KA227QANPGX5IR2Y","target":"record","payload":{"canonical_record":{"source":{"id":"1412.1548","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-12-04T04:00:51Z","cross_cats_sorted":[],"title_canon_sha256":"2fd1327ad07a8646b912c50f564a1a9d13719dfcdf1a42747c4ad102c04de914","abstract_canon_sha256":"702b0849baa820d083f9c3e732e5d32f762680d74b420da8f71878c4606ea451"},"schema_version":"1.0"},"canonical_sha256":"e9582a06c946940d6bf0035e6bf511d6038a9955bcfdd37ed5281b98487ef953","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:32:07.011345Z","signature_b64":"UhoUG6uORomA6LH5fJFn3CL9Bp4Y6qSptmlmELterqxycc5ONRcu+pYNJKsNcFZ2fJERthVC9srLgIQmOAg/DQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e9582a06c946940d6bf0035e6bf511d6038a9955bcfdd37ed5281b98487ef953","last_reissued_at":"2026-05-18T02:32:07.010813Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:32:07.010813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.1548","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":"2026-05-18T02:32:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"S+DiVPO6MsireRGuZn5xFl+AUi5Hp7eAGfAoKf2EpbrMYfRRLooI8kkWGhE6SE3Bz4uTqZti0ApArAp+Q/v0BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:39:25.707344Z"},"content_sha256":"476f89f512bde388893636e73b02cc99dceb3a54f5942fd5e37f583181527e3e","schema_version":"1.0","event_id":"sha256:476f89f512bde388893636e73b02cc99dceb3a54f5942fd5e37f583181527e3e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:5FMCUBWJI2KA227QANPGX5IR2Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Heterogeneous electrocatalysis in porous cathodes of solid oxide fuel cells","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.chem-ph","authors_text":"A. Bertei, A. Mohanram, C. Qi, J. D. Pietras, M. Z. Bazant, S. Poizeau, Y. Fu","submitted_at":"2014-12-04T04:00:51Z","abstract_excerpt":"A general physics-based model is developed for heterogeneous electrocatalysis in porous electrodes and used to predict and interpret the impedance of solid oxide fuel cells. This model describes the coupled processes of oxygen gas dissociative adsorption and surface diffusion of the oxygen intermediate to the triple phase boundary, where charge transfer occurs. The model accurately captures the Gerischer-like frequency dependence and the oxygen partial pressure dependence of the impedance of symmetric cathode cells. Digital image analysis of the microstructure of the cathode functional layer i"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.1548","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":"2026-05-18T02:32:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uh8Z3vg5PZuM2KeQnSLZ92QKI9m0zR8ASStSMHpZFV+hIEfG9OEmnJVwaMkfOlSvRYQWTwNrO0OaUbJcB0ZRCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T21:39:25.707769Z"},"content_sha256":"973a26403f9de1bbab5a1eab7d2967dfbf838778fa6e78d17fb2fe8bb6928381","schema_version":"1.0","event_id":"sha256:973a26403f9de1bbab5a1eab7d2967dfbf838778fa6e78d17fb2fe8bb6928381"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5FMCUBWJI2KA227QANPGX5IR2Y/bundle.json","state_url":"https://pith.science/pith/5FMCUBWJI2KA227QANPGX5IR2Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5FMCUBWJI2KA227QANPGX5IR2Y/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":"2026-05-27T21:39:25Z","links":{"resolver":"https://pith.science/pith/5FMCUBWJI2KA227QANPGX5IR2Y","bundle":"https://pith.science/pith/5FMCUBWJI2KA227QANPGX5IR2Y/bundle.json","state":"https://pith.science/pith/5FMCUBWJI2KA227QANPGX5IR2Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5FMCUBWJI2KA227QANPGX5IR2Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:5FMCUBWJI2KA227QANPGX5IR2Y","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":"702b0849baa820d083f9c3e732e5d32f762680d74b420da8f71878c4606ea451","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-12-04T04:00:51Z","title_canon_sha256":"2fd1327ad07a8646b912c50f564a1a9d13719dfcdf1a42747c4ad102c04de914"},"schema_version":"1.0","source":{"id":"1412.1548","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.1548","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"arxiv_version","alias_value":"1412.1548v1","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.1548","created_at":"2026-05-18T02:32:07Z"},{"alias_kind":"pith_short_12","alias_value":"5FMCUBWJI2KA","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_16","alias_value":"5FMCUBWJI2KA227Q","created_at":"2026-05-18T12:28:14Z"},{"alias_kind":"pith_short_8","alias_value":"5FMCUBWJ","created_at":"2026-05-18T12:28:14Z"}],"graph_snapshots":[{"event_id":"sha256:973a26403f9de1bbab5a1eab7d2967dfbf838778fa6e78d17fb2fe8bb6928381","target":"graph","created_at":"2026-05-18T02:32:07Z","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":"A general physics-based model is developed for heterogeneous electrocatalysis in porous electrodes and used to predict and interpret the impedance of solid oxide fuel cells. This model describes the coupled processes of oxygen gas dissociative adsorption and surface diffusion of the oxygen intermediate to the triple phase boundary, where charge transfer occurs. The model accurately captures the Gerischer-like frequency dependence and the oxygen partial pressure dependence of the impedance of symmetric cathode cells. Digital image analysis of the microstructure of the cathode functional layer i","authors_text":"A. Bertei, A. Mohanram, C. Qi, J. D. Pietras, M. Z. Bazant, S. Poizeau, Y. Fu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-12-04T04:00:51Z","title":"Heterogeneous electrocatalysis in porous cathodes of solid oxide fuel cells"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.1548","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":"sha256:476f89f512bde388893636e73b02cc99dceb3a54f5942fd5e37f583181527e3e","target":"record","created_at":"2026-05-18T02:32:07Z","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":"702b0849baa820d083f9c3e732e5d32f762680d74b420da8f71878c4606ea451","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.chem-ph","submitted_at":"2014-12-04T04:00:51Z","title_canon_sha256":"2fd1327ad07a8646b912c50f564a1a9d13719dfcdf1a42747c4ad102c04de914"},"schema_version":"1.0","source":{"id":"1412.1548","kind":"arxiv","version":1}},"canonical_sha256":"e9582a06c946940d6bf0035e6bf511d6038a9955bcfdd37ed5281b98487ef953","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e9582a06c946940d6bf0035e6bf511d6038a9955bcfdd37ed5281b98487ef953","first_computed_at":"2026-05-18T02:32:07.010813Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:32:07.010813Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UhoUG6uORomA6LH5fJFn3CL9Bp4Y6qSptmlmELterqxycc5ONRcu+pYNJKsNcFZ2fJERthVC9srLgIQmOAg/DQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:32:07.011345Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.1548","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:476f89f512bde388893636e73b02cc99dceb3a54f5942fd5e37f583181527e3e","sha256:973a26403f9de1bbab5a1eab7d2967dfbf838778fa6e78d17fb2fe8bb6928381"],"state_sha256":"a3449f2268451427c11784c899acaed93c4f3927cd08d31af61413591192e0ff"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"te0ezkv0xy7rHDnBtzFb2efA7cbrhTn6JWoeQp4veu6izq6jWlesiumWXbJOLNZToTyw7mow1HFZK3uAg2v7Bw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T21:39:25.711469Z","bundle_sha256":"00ad01f17de2c3b46f20d29459d816854f13aa858e0428bede47d676399a79c0"}}