{"public_id":"cl_75d001bd359309c823c77c870c6dd95d","status":"active","superseded_by_public_id":null,"corpus_id":93571536,"text":"NH3-TPD and Pyridine-FTIR identify weak and strong acid sites in HZSM-5, with weak acidity involving Lewis and hydrogen-bonded sites and strong acidity mainly involving Brönsted acid sites.","confidence":0.96,"paper":{"corpus_id":93571536,"title":"HZSM-5 Zeolites with Different SiO2/Al2O3 Ratios. Characterization and NH3 Desorption Kinetics","url":"https://sah.borca.ai/papers/93571536"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.96,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_740b4b0921a396b05f1f1a07141b11a8","name":"acid sites","description":"Surface acid centers in the zeolite that can be classified as weak or strong.","types":["surface property"],"url":"https://sah.borca.ai/concepts/co_740b4b0921a396b05f1f1a07141b11a8"},{"public_id":"co_993756bbb13ac311e07a12be1acc890b","name":"Pyridine-FTIR","description":"Fourier-transform infrared spectroscopy with pyridine adsorbate used to probe acid-site types.","types":["measurement technique"],"url":"https://sah.borca.ai/concepts/co_993756bbb13ac311e07a12be1acc890b"},{"public_id":"co_c6b15ca21a04ccdb822d25d9bf0efd9c","name":"NH3-TPD","description":"Temperature-programmed desorption of ammonia used to characterize acid-site strength and distribution.","types":["measurement technique"],"url":"https://sah.borca.ai/concepts/co_c6b15ca21a04ccdb822d25d9bf0efd9c"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_75d001bd359309c823c77c870c6dd95d"}