In situ tuning of electronic structure of catalysts using controllable hydrogen spillover for enhanced selectivity.
In situ tuning of electronic structure of catalysts using controllable hydrogen spillover for enhanced selectivity.
复制标题
利用可控氢溢出对催化剂电子结构进行原位调控以提高选择性
DOI:
10.1038/s41467-020-18567-6
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发表时间:
2020-09-22
影响因子:
16.6
通讯作者:
Qin Y
中科院分区:
文献类型:
--
作者:
Xiong M;Gao Z;Zhao P;Wang G;Yan W;Xing S;Wang P;Ma J;Jiang Z;Liu X;Ma J;Xu J;Qin Y
In situ tuning of the electronic structure of active sites is a long-standing challenge. Herein, we propose a strategy by controlling the hydrogen spillover distance to in situ tune the electronic structure. The strategy is demonstrated to be feasible with the assistance of CoOx/Al2O3/Pt catalysts prepared by atomic layer deposition in which CoOxand Pt nanoparticles are separated by hollow Al2O3nanotubes. The strength of hydrogen spillover from Pt to CoOxcan be precisely tailored by varying the Al2O3thickness. Using CoOx/Al2O3catalyzed styrene epoxidation as an example, the CoOx/Al2O3/Pt with 7 nm Al2O3layer exhibits greatly enhanced selectivity (from 74.3% to 94.8%) when H2is added. The enhanced selectivity is attributed to the introduction of controllable hydrogen spillover, resulting in the reduction of CoOxduring the reaction. Our method is also effective for the epoxidation of styrene derivatives. We anticipate this method is a general strategy for other reactions.
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影响因子:
15
作者:
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通讯作者:
Somorjai, Gabor A.
影响因子:
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通讯作者:
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