{"created":"2025-02-21T03:15:12.218442+00:00","id":2006243,"links":{},"metadata":{"_buckets":{"deposit":"4b42c392-5ce3-462f-975d-a84dea22bd49"},"_deposit":{"created_by":41,"id":"2006243","owners":[41],"pid":{"revision_id":0,"type":"depid","value":"2006243"},"status":"published"},"_oai":{"id":"oai:hiroshima.repo.nii.ac.jp:02006243","sets":["1730444907710"]},"author_link":[],"item_1617186331708":{"attribute_name":"Title","attribute_value_mlt":[{"subitem_title":"Catalytic mechanism of the dehydrogenation of ethylbenzene over Fe-Co/Mg(Al)O derived from hydrotalcites","subitem_title_language":"en"}]},"item_1617186419668":{"attribute_name":"Creator","attribute_type":"creator","attribute_value_mlt":[{"creatorNames":[{"creatorName":"Tope, Balkrishna B.","creatorNameLang":"en"}],"familyNames":[{"familyName":"Tope","familyNameLang":"en"}],"givenNames":[{"givenName":"Balkrishna B.","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Balasamy, Rabindran J.","creatorNameLang":"en"}],"familyNames":[{"familyName":"Balasamy","familyNameLang":"en"}],"givenNames":[{"givenName":"Rabindran J.","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Khurshid, Alam","creatorNameLang":"en"}],"familyNames":[{"familyName":"Khurshid","familyNameLang":"en"}],"givenNames":[{"givenName":"Alam","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Atanda, Luqman A.","creatorNameLang":"en"}],"familyNames":[{"familyName":"Atanda","familyNameLang":"en"}],"givenNames":[{"givenName":"Luqman A.","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Yahiro, Hidenori","creatorNameLang":"en"}],"familyNames":[{"familyName":"Yahiro","familyNameLang":"en"}],"givenNames":[{"givenName":"Hidenori","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Shishido, Tetsuya","creatorNameLang":"en"}],"familyNames":[{"familyName":"Shishido","familyNameLang":"en"}],"givenNames":[{"givenName":"Tetsuya","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Takehira, Katsuomi","creatorNameLang":"en"}],"familyNames":[{"familyName":"Takehira","familyNameLang":"en"}],"givenNames":[{"givenName":"Katsuomi","givenNameLang":"en"}]},{"creatorNames":[{"creatorName":"Al-Khattaf, Sulaiman S.","creatorNameLang":"en"}],"familyNames":[{"familyName":"Al-Khattaf","familyNameLang":"en"}],"givenNames":[{"givenName":"Sulaiman S.","givenNameLang":"en"}]}]},"item_1617186476635":{"attribute_name":"Access Rights","attribute_value_mlt":[{"subitem_access_right":"open access","subitem_access_right_uri":"http://purl.org/coar/access_right/c_abf2"}]},"item_1617186499011":{"attribute_name":"Rights","attribute_value_mlt":[{"subitem_rights":"(c) 2012 Elsevier B.V. All rights reserved."}]},"item_1617186609386":{"attribute_name":"Subject","attribute_value_mlt":[{"subitem_subject":"Ethylbenzene dehydrogenation","subitem_subject_scheme":"Other"},{"subitem_subject":"Styrene","subitem_subject_scheme":"Other"},{"subitem_subject":"Fe(3+)-O-Co(3+/2+)(1/1) active species","subitem_subject_scheme":"Other"},{"subitem_subject":"Hydrotalcite","subitem_subject_scheme":"Other"},{"subitem_subject":"EXAFS","subitem_subject_scheme":"Other"},{"subitem_subject":"FTIR","subitem_subject_scheme":"Other"},{"subitem_subject":"C-O bond formation","subitem_subject_scheme":"Other"},{"subitem_subject":"570","subitem_subject_scheme":"NDC"}]},"item_1617186626617":{"attribute_name":"Description","attribute_value_mlt":[{"subitem_description":"Catalytic mechanism of ethylbenzene dehydrogenation over Fe-Co/Mg(Al)O derived from hydrotalcites has been studied based on the XAFS and XPS catalyst characterization and the FTIR measurements of adsorbed species. Fe-Co/Mg(Al)O showed synergy, whereas Fe-Ni/Mg(Al)O showed no synergy, in the dehydrogenation of ethylbenzene. Ni species were stably incorporated as Ni(2+) in the regular sites in periclase and spinel structure in the Fe-Ni/Mg(Al)O. Contrarily, Co species exists as a mixture of Co(3+)/Co(2+) in the Fe-Co/Mg(Al)O and was partially isolated from the regular sites in the structures with increasing the Co content. Co addition enhanced Lewis acidity of Fe(3+) active sites by forming Fe(3+)-O-Co(3+/2+)(1/1) bond, resulting in an increase in the activity. FTIR of ethylbenzene adsorbed on the Fe-Co/Mg(Al)O clearly showed formations of C-O bond and pi-adsorbed aromatic ring. This suggests that ethylbenzene was strongly adsorbed on the Fe(3+) acid sites via pi-bonding and the dehydrogenation was initiated by alpha-H(+) abstraction from ethyl group on Mg(2+)-O(2-) basic sites, followed by C-O-Mg bond formation. The alpha-H(+) abstraction by O(2-)(-Mg(2+)) was likely followed by beta-H abstraction, leading to the formations of styrene and H(2). Such catalytic mechanism by the Fe(3+) acid-O(2-)(-Mg(2+)) base couple and the Fe(3+)/Fe(2+) reduction-oxidation cycle was further assisted by Co(3+)/Co(2+), leading to a good catalytic activity for the dehydrogenation of ethylbenzene.","subitem_description_language":"en"}]},"item_1617186643794":{"attribute_name":"Publisher","attribute_value_mlt":[{"subitem_publisher":"Elsevier Science BV"}]},"item_1617186702042":{"attribute_name":"Language","attribute_value_mlt":[{"subitem_language":"eng"}]},"item_1617186920753":{"attribute_name":"Source Identifier","attribute_value_mlt":[{"subitem_source_identifier":"0926-860X","subitem_source_identifier_type":"ISSN"},{"subitem_source_identifier":"AA10821202","subitem_source_identifier_type":"NCID"}]},"item_1617187024783":{"attribute_name":"Page Start","attribute_value_mlt":[{"subitem_start_page":"118"}]},"item_1617187056579":{"attribute_name":"Bibliographic Information","attribute_value_mlt":[{"bibliographicIssueDates":{"bibliographicIssueDate":"2011","bibliographicIssueDateType":"Issued"},"bibliographicIssueNumber":"1-2","bibliographicPageEnd":"126","bibliographicPageStart":"118","bibliographicVolumeNumber":"407","bibliographic_titles":[{"bibliographic_title":"Applied Catalysis A-General"},{"bibliographic_title":"Applied Catalysis A-General"}]}]},"item_1617258105262":{"attribute_name":"Resource Type","attribute_value_mlt":[{"resourcetype":"journal article","resourceuri":"http://purl.org/coar/resource_type/c_6501"}]},"item_1617265215918":{"attribute_name":"Version Type","attribute_value_mlt":[{"subitem_version_resource":"http://purl.org/coar/version/c_b1a7d7d4d402bcce","subitem_version_type":"AO"}]},"item_1617353299429":{"attribute_name":"Relation","attribute_value_mlt":[{"subitem_relation_type_id":{"subitem_relation_type_id_text":"10.1016/j.apcata.2011.08.032","subitem_relation_type_select":"DOI"}},{"subitem_relation_type_id":{"subitem_relation_type_id_text":"http://dx.doi.org/10.1016/j.apcata.2011.08.032","subitem_relation_type_select":"DOI"}}]},"item_1617605131499":{"attribute_name":"File","attribute_type":"file","attribute_value_mlt":[{"accessrole":"open_access","date":[{"dateType":"Available","dateValue":"2023-03-18"}],"displaytype":"simple","filename":"ApplCatalGen_407_118.pdf","filesize":[{"value":"415.4 KB"}],"mimetype":"application/pdf","url":{"objectType":"fulltext","url":"https://hiroshima.repo.nii.ac.jp/record/2006243/files/ApplCatalGen_407_118.pdf"},"version_id":"3adc396b-6389-489e-b30d-d5f675ac342a"}]},"item_1732771732025":{"attribute_name":"旧ID","attribute_value":"34822"},"item_title":"Catalytic mechanism of the dehydrogenation of ethylbenzene over Fe-Co/Mg(Al)O derived from hydrotalcites","item_type_id":"40003","owner":"41","path":["1730444907710"],"pubdate":{"attribute_name":"PubDate","attribute_value":"2023-03-18"},"publish_date":"2023-03-18","publish_status":"0","recid":"2006243","relation_version_is_last":true,"title":["Catalytic mechanism of the dehydrogenation of ethylbenzene over Fe-Co/Mg(Al)O derived from hydrotalcites"],"weko_creator_id":"41","weko_shared_id":-1},"updated":"2025-02-21T07:03:18.764710+00:00"}