Engineering oxygen vacancies and localized amorphous regions in CuO-ZnO separately boost catalytic reactivity and selectivity
Engineering oxygen vacancies and localized amorphous regions in CuO-ZnO separately boost catalytic reactivity and selectivity
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CuO-ZnO 中的氧空位和局部非晶区域分别提高了催化反应活性和选择性
DOI:
10.1007/s12274-022-4940-3
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发表时间:
2022-10
期刊:
影响因子:
--
通讯作者:
Fabing Su
中科院分区:
文献类型:
--
作者:
Yongjun Ji;Xiaoli Chen;Shaomian Liu;Liwen Xin;Xingyu Jiang;Bin Zhang;Huifang Li;Wenxing Chen;Ziyi Zhong;Ligen Wang;Guangwen Xu;Fabing Su
Generating different types of defects in heterogeneous catalysts for synergetic promotion of the reactivity and selectivity in catalytic reactions is highly challenging due to the lack of effective theoretical guidance. Herein, we demonstrate a facile strategy to introduce two types of defects into the CuO-ZnO model catalyst, namely oxygen vacancies (OVs) induced by H2partial reduction and localized amorphous regions (LARs) generated via the ball milling process. Using industrially important Rochow-Müller reaction as a representative, we found OVs predominantly improved the target product selectivity of dimethyldichlorosilane, while LARs significantly increased the conversion of reactant Si. The CuO-ZnO catalyst with optimized OVs and LARs contents achieved the best catalytic property. Theoretical calculation further revealed that LARs promote the generation of the Cu3Si active phase, and OVs impact the electronic structure of the Cu3Si active phase. This work provides a new understanding of the roles of different catalyst defects and a feasible way of engineering the catalyst structure for better catalytic performances.
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影响因子:
15
作者:
Camellone, Matteo Farnesi;Fabris, Stefano
通讯作者:
Fabris, Stefano
DOI:
10.1002/advs.202105292
发表时间:
2022-05
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
作者:
通讯作者:
--
影响因子:
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影响因子:
13.6
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Lu Y
影响因子:
12.9
作者:
Yige Zhao;Jingjun Liu;Chenguang Liu;Feng Wang;Ye Song
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