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Understanding the strain effect of Au@Pd nanocatalysts by surface-enhanced Raman spectroscopy

A gap-mode configuration was developed for the in situ SERS study of the structure-activity relationship of Au@Pd core-shell nanocatalysts, which show much better performance in the selective oxidation of benzyl alcohol compared to Pd. The in situ SERS results reveal that the tensile strain in the P...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2019-07, Vol.55 (6), p.8824-8827
Main Authors: Wei, Jie, Zhang, Yu-Jin, Qin, Si-Na, Yang, Wei-Min, Zhang, Hua, Yang, Zhi-Lin, Tian, Zhong-Qun, Li, Jian-Feng
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Summary:A gap-mode configuration was developed for the in situ SERS study of the structure-activity relationship of Au@Pd core-shell nanocatalysts, which show much better performance in the selective oxidation of benzyl alcohol compared to Pd. The in situ SERS results reveal that the tensile strain in the Pd shell could promote the activation of oxygen, thus improving the activity. Such a tensile strain effect decreases with the increase of the Pd shell thickness, leading to a volcano correlation between the activity and the shell thickness. A gap-mode configuration was developed for the in situ SERS study of the structure-activity relationship of Au@Pd core-shell nanocatalysts, which show much better performance in the selective oxidation of benzyl alcohol compared to Pd.
ISSN:1359-7345
1364-548X
DOI:10.1039/c9cc02639h