Interfacing with silica boosts the catalysis of copper

Chaofa Xu, Guangxu Chen, Yun Zhao, Pengxin Liu, Xinping Duan, Lin Gu, Gang Fu (), Youzhu Yuan () and Nanfeng Zheng ()
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Chaofa Xu: Xiamen University
Guangxu Chen: Xiamen University
Yun Zhao: Xiamen University
Pengxin Liu: Xiamen University
Xinping Duan: Xiamen University
Lin Gu: Chinese Academy of Sciences
Gang Fu: Xiamen University
Youzhu Yuan: Xiamen University
Nanfeng Zheng: Xiamen University

Nature Communications, 2018, vol. 9, issue 1, 1-10

Abstract: Abstract Metal-support interaction is one of the most important parameters in controlling the catalysis of supported metal catalysts. Silica, a widely used oxide support, has been rarely reported as an effective support to create active metal-support interfaces for promoting catalysis. In this work, by coating Cu microparticles with mesoporous SiO2, we discover that Cu/SiO2 interface creates an exceptional effect to promote catalytic hydrogenation of esters. Both computational and experimental studies reveal that Cu–Hδ− and SiO–Hδ+ species would be formed at the Cu–O–SiOx interface upon H2 dissociation, thus promoting the ester hydrogenation by stablizing the transition states. Based on the proposed catalytic mechanism, encapsulting copper phyllosilicate nanotubes with mesoporous silica followed by hydrogen reduction is developed as an effective method to create a practical Cu nanocatalyst with abundant Cu-O-SiOx interfaces. The catalyst exhibits the best performance in the hydrogenation of dimethyl oxalate to ethylene glycol among all reported Cu catalysts.

Date: 2018
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DOI: 10.1038/s41467-018-05757-6

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