Kazu Okumura, Kai Tanaka, Akimichi Ohtsuki, Hikaru Iiyoshi and Naonobu Katada
{"title":"Direct methylation of benzene with methane over Co/MFI catalysts generated by self-dispersion of Co(OH)2†","authors":"Kazu Okumura, Kai Tanaka, Akimichi Ohtsuki, Hikaru Iiyoshi and Naonobu Katada","doi":"10.1039/D3CY00305A","DOIUrl":null,"url":null,"abstract":"<p >A methane–benzene reaction was performed over Co/MFI prepared with an aqueous solution of Co(OAc)<small><sub>2</sub></small> and MFI zeolite. Co(OH)<small><sub>2</sub></small> was deposited on the MFI zeolite when the Co(OAc)<small><sub>2</sub></small> solution was stirred at 343 K in the presence of MFI. A decline of the h-peak in NH<small><sub>3</sub></small> TPD occurred during the loading of Co on MFI. Further thermal treatment at 573–773 K caused the spontaneous formation of the atomically dispersed Co species, which was observed with Co K-edge XAFS. The toluene formation rate of the catalyst prepared with Co(OAc)<small><sub>2</sub></small> was proportional to the Co loading and was higher than that prepared with Co(NO<small><sub>3</sub></small>)<small><sub>2</sub></small> due to the large amount of supported Co.</p>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":" 20","pages":" 5969-5977"},"PeriodicalIF":4.4000,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Catalysis Science & Technology","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2023/cy/d3cy00305a","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 1
Abstract
A methane–benzene reaction was performed over Co/MFI prepared with an aqueous solution of Co(OAc)2 and MFI zeolite. Co(OH)2 was deposited on the MFI zeolite when the Co(OAc)2 solution was stirred at 343 K in the presence of MFI. A decline of the h-peak in NH3 TPD occurred during the loading of Co on MFI. Further thermal treatment at 573–773 K caused the spontaneous formation of the atomically dispersed Co species, which was observed with Co K-edge XAFS. The toluene formation rate of the catalyst prepared with Co(OAc)2 was proportional to the Co loading and was higher than that prepared with Co(NO3)2 due to the large amount of supported Co.
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