Volume 63, Issue 32 e202406728
Research Article

Unraveling the Unique Strong Metal-Support Interaction in Titanium Dioxide Supported Platinum Clusters for the Hydrogen Evolution Reaction

Zhouxin Luo

Zhouxin Luo

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

These authors contribute equally to this work.

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Xiao Han

Xiao Han

Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026 China

These authors contribute equally to this work.

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Zhentao Ma

Zhentao Ma

National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, Anhui 230029, P. R. China

These authors contribute equally to this work.

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Dr. Bingxing Zhang

Dr. Bingxing Zhang

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

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Prof. Xusheng Zheng

Prof. Xusheng Zheng

National Synchrotron Radiation Laboratory (NSRL), University of Science and Technology of China, Hefei, Anhui 230029, P. R. China

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Prof. Yongfeng Liu

Prof. Yongfeng Liu

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

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Prof. Mingxia Gao

Prof. Mingxia Gao

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

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Dr. Guoqiang Zhao

Corresponding Author

Dr. Guoqiang Zhao

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

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Prof. Yue Lin

Corresponding Author

Prof. Yue Lin

Hefei National Research Center for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026 China

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Prof. Hongge Pan

Prof. Hongge Pan

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

Institute of Science and Technology for New Energy, Xi'an Technological University, Xi'an, 710021 P. R. China

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Prof. Wenping Sun

Corresponding Author

Prof. Wenping Sun

School of Materials Science and Engineering, Zhejiang University, Hangzhou, 310058 P. R. China

State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027 P. R. China

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First published: 21 May 2024
Citations: 25

Graphical Abstract

We achieve the first construction of strong metal-support interaction (SMSI) between Pt sub-nanometer clusters and amorphous TiO2 nanosheets. Unique SMSI behaviors – ordering process of Pt atoms within clusters and superior stability in oxygen at high temperatures – are unraveled. Further investigation suggests that the disappeared CO adsorption ability originates from the unique electronic interaction after forming SMSI.

Abstract

Strong metal-support interaction (SMSI) is crucial to modulating the nature of metal species, yet the SMSI behaviors of sub-nanometer metal clusters remain unknown due to the difficulties in constructing SMSI at cluster scale. Herein, we achieve the successful construction of the SMSI between Pt clusters and amorphous TiO2 nanosheets by vacuum annealing, which requires a relatively low temperature that avoids the aggregation of small clusters. In situ scanning transmission electron microscopy observation is employed to explore the SMSI behaviors, and the results reveal the dynamic rearrangement of Pt atoms upon annealing for the first time. The originally disordered Pt atoms become ordered as the crystallizing of the amorphous TiO2 support, forming an epitaxial interface between Pt and TiO2. Such a SMSI state can remain stable in oxidation environment even at 400 °C. Further investigations prove that the electron transfer from TiO2 to Pt occupies the Pt 5d orbitals, which is responsible for the disappeared CO adsorption ability of Pt/TiO2 after forming SMSI. This work not only opens a new avenue for constructing SMSI at cluster scale but also provides in-depth understanding on the unique SMSI behavior, which would stimulate the development of supported metal clusters for catalysis applications.

Conflict of interests

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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