Generating active metal/oxide reverse interfaces through coordinated migration of single atoms

Lina Zhang, Shaolong Wan, Congcong Du, Qiang Wan, Hien Pham, Jiafei Zhao, Xingyu Ding, Diye Wei, Wei Zhao, Jiwei Li, Yanping Zheng, Hui Xie, Hua Zhang, Mingshu Chen, Kelvin H. L. Zhang, Shuai Wang, Jingdong Lin, Jianyu Huang, Sen Lin (), Yong Wang, Abhaya K. Datye, Ye Wang () and Haifeng Xiong ()
Additional contact information
Lina Zhang: Xiamen University
Shaolong Wan: Xiamen University
Congcong Du: Xiamen University
Qiang Wan: Fuzhou University
Hien Pham: University of New Mexico
Jiafei Zhao: Xiamen University
Xingyu Ding: Xiamen University
Diye Wei: Xiamen University
Wei Zhao: Shenzhen University
Jiwei Li: Xiamen University
Yanping Zheng: Xiamen University
Hui Xie: Xiamen University
Hua Zhang: Xiamen University
Mingshu Chen: Xiamen University
Kelvin H. L. Zhang: Xiamen University
Shuai Wang: Xiamen University
Jingdong Lin: Xiamen University
Jianyu Huang: Yanshan University
Sen Lin: Fuzhou University
Yong Wang: Washington State University
Abhaya K. Datye: University of New Mexico
Ye Wang: Xiamen University
Haifeng Xiong: Xiamen University

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract Identification of active sites in catalytic materials is important and helps establish approaches to the precise design of catalysts for achieving high reactivity. Generally, active sites of conventional heterogeneous catalysts can be single atom, nanoparticle or a metal/oxide interface. Herein, we report that metal/oxide reverse interfaces can also be active sites which are created from the coordinated migration of metal and oxide atoms. As an example, a Pd1/CeO2 single-atom catalyst prepared via atom trapping, which is otherwise inactive at 30 °C, is able to completely oxidize formaldehyde after steam treatment. The enhanced reactivity is due to the formation of a Ce2O3-Pd nanoparticle domain interface, which is generated by the migration of both Ce and Pd atoms on the atom-trapped Pd1/CeO2 catalyst during steam treatment. We show that the generation of metal oxide-metal interfaces can be achieved in other heterogeneous catalysts due to the coordinated mobility of metal and oxide atoms, demonstrating the formation of a new active interface when using metal single-atom material as catalyst precursor.

Date: 2024
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DOI: 10.1038/s41467-024-45483-w

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