{"created":"2023-05-15T15:03:00.449228+00:00","id":85359,"links":{},"metadata":{"_buckets":{"deposit":"0ac61a58-5cc2-4905-a734-f36d00626cdc"},"_deposit":{"created_by":1,"id":"85359","owners":[1],"pid":{"revision_id":0,"type":"depid","value":"85359"},"status":"published"},"_oai":{"id":"oai:repo.qst.go.jp:00085359","sets":["10:29"]},"author_link":["1032320","1032321","1032328","1032325","1032318","1032319","1032329","1032323","1032326","1032322","1032330","1032327","1032324"],"item_10005_date_7":{"attribute_name":"発表年月日","attribute_value_mlt":[{"subitem_date_issued_datetime":"2022-03-17","subitem_date_issued_type":"Issued"}]},"item_10005_description_5":{"attribute_name":"抄録","attribute_value_mlt":[{"subitem_description":"燃料電池の普及に向けて炭素担持Ptナノ粒子触媒の酸素還元反応（ORR）活性向上が求められているが，我々のグループでは炭素担体を模擬したグラッシーカーボン（GC）基板へのArイオン照射によってORR活性が，未照射試料に比べて2.5倍に向上することを見いだした。このイオン照射によるORR活性向上メカニズム解明に向けて，本研究ではORR初期過程の酸素吸着に着目し，酸素雰囲気でのin situ XAFS測定を行った。水素還元直後の純粋Pt状態と酸素暴露状態を観測し，酸素暴露前後のXAFSスペクトルの差分からPtナノ粒子の酸素吸着状態のみを導出し，照射試料と未照射試料を比較した。先行研究からPtへの酸素吸着(Pt-O)に起因するピークを同定し，そのピーク位置を比較すると，照射試料の方が0.7 eV低エネルギーシフトしていることが分かった。これはPt-O反結合性準位の低下を意味するため，反結合準位への電子充填が起こりやすくなることでPt-Oが弱結合化して酸素離脱が容易に変化していることが分かった。欠陥導入によるPt-Oの弱結合化の起源を解明するために、分子動力学計算で導いた酸素吸着状態との比較を行った。欠陥導入によってPt 5d軌道とのC 2p軌道との混成が変わり（=担持状態変化），酸素吸着様式が変化することで，吸着酸素2p軌道とPt 5d軌道の混成が弱くなってPt-Oが弱結合化することが分かった。","subitem_description_type":"Abstract"}]},"item_10005_description_6":{"attribute_name":"会議概要（会議名, 開催地, 会期, 主催者等）","attribute_value_mlt":[{"subitem_description":"電気化学会第89回大会","subitem_description_type":"Other"}]},"item_access_right":{"attribute_name":"アクセス権","attribute_value_mlt":[{"subitem_access_right":"metadata only access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_14cb"}]},"item_creator":{"attribute_name":"著者","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"岡崎, 宏之"}],"nameIdentifiers":[{"nameIdentifier":"1032318","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"出崎, 亮"}],"nameIdentifiers":[{"nameIdentifier":"1032319","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"越川, 博"}],"nameIdentifiers":[{"nameIdentifier":"1032320","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"松村, 大樹"}],"nameIdentifiers":[{"nameIdentifier":"1032321","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"池田, 隆司"}],"nameIdentifiers":[{"nameIdentifier":"1032322","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"山本, 春也"}],"nameIdentifiers":[{"nameIdentifier":"1032323","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"八巻, 徹也"}],"nameIdentifiers":[{"nameIdentifier":"1032324","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hiroyuki, Okazaki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032325","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Akira, Idesaki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032326","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Hiroshi, Koshikawa","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032327","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Takashi, Ikeda","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032328","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Shunya, Yamamoto","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032329","nameIdentifierScheme":"WEKO"}]},{"creatorNames":[{"creatorName":"Tetsuya, Yamaki","creatorNameLang":"en"}],"nameIdentifiers":[{"nameIdentifier":"1032330","nameIdentifierScheme":"WEKO"}]}]},"item_language":{"attribute_name":"言語","attribute_value_mlt":[{"subitem_language":"jpn"}]},"item_resource_type":{"attribute_name":"資源タイプ","attribute_value_mlt":[{"resourcetype":"conference object","resourceuri":"http://purl.org/coar/resource_type/c_c94f"}]},"item_title":"担体へのイオン照射による炭素担持Pt触媒の酸素吸着状態変化","item_titles":{"attribute_name":"タイトル","attribute_value_mlt":[{"subitem_title":"担体へのイオン照射による炭素担持Pt触媒の酸素吸着状態変化"}]},"item_type_id":"10005","owner":"1","path":["29"],"pubdate":{"attribute_name":"公開日","attribute_value":"2022-03-16"},"publish_date":"2022-03-16","publish_status":"0","recid":"85359","relation_version_is_last":true,"title":["担体へのイオン照射による炭素担持Pt触媒の酸素吸着状態変化"],"weko_creator_id":"1","weko_shared_id":-1},"updated":"2023-05-15T17:38:00.585850+00:00"}