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Reversible loss of core-shell structure for Ni-Au bimetallic nanoparticles during CO2 hydrogenation
Zhang, XB; Han, SB; Zhu, BE; Zhang, GH; Li, XY; Gao, Y; Wu, ZX; Yang, B; Liu, YF; Baaziz, W; Ersen, O; Gu, M; Miller, JT; Liu, W
2020
Source PublicationNATURE CATALYSIS
ISSN2520-1158
Volume3Issue:4Pages:411-417
Subtype期刊论文
AbstractThe high catalytic performance of core-shell nanoparticles is usually attributed to their distinct geometric and electronic structures. Here we reveal a dynamic mechanism that overturns this conventional understanding by a direct environmental transmission electron microscopy visualization coupled with multiple state-of-the-art in situ techniques, which include synchrotron X-ray absorption spectroscopy, infrared spectroscopy and theoretical simulations. A Ni-Au catalytic system, which exhibits a highly selective CO production in CO2 hydrogenation, features an intact ultrathin Au shell over the Ni core before and after the reaction. However, the catalytic performance could not be attributed to the Au shell surface, but rather to the formation of a transient reconstructed alloy surface, promoted by CO adsorption during the reaction. The discovery of such a reversible transformation urges us to reconsider the reaction mechanism beyond the stationary model, and may have important implications not only for core-shell nanoparticles, but also for other well-defined nanocatalysts.
KeywordELECTRON-MICROSCOPY SHAPE CHANGES CATALYSTS DECOMPOSITION STABILITY OXIDATION PD
DOI10.1038/s41929-020-0440-2
Indexed BySCI ; EI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/33113
Collection中科院上海应用物理研究所2011-2020年
Affiliation1.Chinese Acad Sci, DICP, Dalian Natl Lab Clean Energy, Dalian, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen, Peoples R China
4.Chinese Acad Sci, Shanghai Adv Res Inst, Zhangjiang Lab, Shanghai, Peoples R China
5.Chinese Acad Sci, Shanghai Inst Appl Phys, Div Interfacial Water, Shanghai, Peoples R China
6.Chinese Acad Sci, Shanghai Inst Appl Phys, Key Lab Interfacial Phys & Technol, Shanghai, Peoples R China
7.Dalian Univ Technol, Sch Chem Engn, PSU DUT Joint Ctr Energy Res, State Key Lab Fine Chem, Dalian, Liaoning, Peoples R China
8.Purdue Univ, Davidson Sch Chem Engn, W Lafayette, IN 47907 USA
9.Univ Strasbourg, CNRS, IPCMS, UMR 7504, Strasbourg, France
Recommended Citation
GB/T 7714
Zhang, XB,Han, SB,Zhu, BE,et al. Reversible loss of core-shell structure for Ni-Au bimetallic nanoparticles during CO2 hydrogenation[J]. NATURE CATALYSIS,2020,3(4):411-417.
APA Zhang, XB.,Han, SB.,Zhu, BE.,Zhang, GH.,Li, XY.,...&Liu, W.(2020).Reversible loss of core-shell structure for Ni-Au bimetallic nanoparticles during CO2 hydrogenation.NATURE CATALYSIS,3(4),411-417.
MLA Zhang, XB,et al."Reversible loss of core-shell structure for Ni-Au bimetallic nanoparticles during CO2 hydrogenation".NATURE CATALYSIS 3.4(2020):411-417.
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