High-performance microstructured Au-Ag bimetallic catalyst for oxidative coupling of methanol to methyl formate

Microfibrous-structured 1Au-xAg/Al-fiber (x = 0.2, 0.4 and 0.6 wt%) catalysts prepared by galvanic stepwise deposition of Au and Ag onto Al-fiber network have been tested for the oxidative coupling of methanol to methyl formate. Among these catalysts, 1Au-0.2Ag/Al-fiber provided high activity, selec...

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Bibliographic Details
Published in:Catalysis communications 2019-09, Vol.129, p.105741, Article 105741
Main Authors: Zhang, Qiaofei, Zhu, Chunshan, Yang, Ganghua, Sun, Yige, Wang, Dongsheng, Liu, Jiawen
Format: Article
Language:English
Subjects:
Al fiber
Bimetallic Au-Ag
Galvanic deposition
Methanol oxidation
Methyl formate
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Summary:Microfibrous-structured 1Au-xAg/Al-fiber (x = 0.2, 0.4 and 0.6 wt%) catalysts prepared by galvanic stepwise deposition of Au and Ag onto Al-fiber network have been tested for the oxidative coupling of methanol to methyl formate. Among these catalysts, 1Au-0.2Ag/Al-fiber provided high activity, selectivity and good stability, by nature, due to the well-dispersed Ag metal phase to facilitate the availability of reactive oxygen species. The increase of Ag loading led to the screening of surface Au which favours the adsorption of methanol, thus deteriorating methanol conversion. [Display omitted] •1Au-xAg/Al-fiber is prepared by galvanic deposition of Au and Ag onto Al-fiber.•Addition amounts of Ag play a critical role in oxidative coupling of methanol.•Methanol conversion is downward as Ag increases while MF selectivity similar.•The best 1Au-0.2Ag/Al-fiber indicates a well-dispersed surface Ag.•Increase of Ag leads to the screening of surface Au and thus inferior conversion.
ISSN:1566-7367
1873-3905
DOI:10.1016/j.catcom.2019.105741