Volume 133, Issue 41 pp. 22513-22518
Forschungsartikel

Facet-Dependent Oxidative Strong Metal-Support Interactions of Palladium–TiO2 Determined by In Situ Transmission Electron Microscopy

Dr. Min Tang

Dr. Min Tang

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

Materials Chemistry and Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, 3584 CG Utrecht, The Netherlands

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Songda Li

Songda Li

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Shiyuan Chen

Shiyuan Chen

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Yang Ou

Yang Ou

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Matsumoto Hiroaki

Matsumoto Hiroaki

Hitachi High-Tech (Shanghai) Co., Ltd., Shanghai, 201203 China

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Dr. Wentao Yuan

Dr. Wentao Yuan

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Dr. Beien Zhu

Dr. Beien Zhu

Interdisciplinary Research Center, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese, Academy of Sciences, Shanghai, 201210 China

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Prof. Hangsheng Yang

Prof. Hangsheng Yang

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Prof. Yi Gao

Prof. Yi Gao

Interdisciplinary Research Center, Zhangjiang Laboratory, Shanghai Advanced Research Institute, Chinese, Academy of Sciences, Shanghai, 201210 China

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Prof. Ze Zhang

Prof. Ze Zhang

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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Prof. Yong Wang

Corresponding Author

Prof. Yong Wang

Center of Electron Microscopy and State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310027 China

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First published: 05 August 2021
Citations: 16

Abstract

The strong metal-support interaction (SMSI) is widely used in supported metal catalysts and extensive studies have been performed to understand it. Although considerable progress has been achieved, the surface structure of the support, as an important influencing factor, is usually ignored. We report a facet-dependent SMSI of Pd-TiO2 in oxygen by using in situ atmospheric pressure TEM. Pd NPs supported on TiO2 (101) and (100) surfaces showed encapsulation. In contrast, no such cover layer was observed in Pd-TiO2 (001) catalyst under the same conditions. This facet-dependent SMSI, which originates from the variable surface structure of the support, was demonstrated in a probe reaction of methane combustion catalyzed by Pd-TiO2. Our discovery of the oxidative facet-dependent SMSI gives direct evidence of the important role of the support surface structure in SMSI and provides a new way to tune the interaction between metal NPs and the support as well as catalytic activity.

Conflict of interest

The authors declare no conflict of interest.

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