Non defect-stabilized thermally stable single-atom catalyst

Rui Lang, Wei Xi, Jin-Cheng Liu, Yi-Tao Cui, Tianbo Li, Adam Fraser Lee, Fang Chen, Yang Chen, Lei Li, Lin Li, Jian Lin, Shu Miao, Xiaoyan Liu, Ai-Qin Wang, Xiaodong Wang, Jun Luo (), Botao Qiao (), Jun Li () and Tao Zhang
Additional contact information
Rui Lang: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Wei Xi: Tianjin University of Technology
Jin-Cheng Liu: Tsinghua University
Yi-Tao Cui: The University of Tokyo
Tianbo Li: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Adam Fraser Lee: Royal Melbourne Institute of Technology University
Fang Chen: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Yang Chen: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Lei Li: Synchrotron Radiation Nanotechnology Center, University of Hyogo
Lin Li: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Jian Lin: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Shu Miao: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Xiaoyan Liu: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Ai-Qin Wang: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Xiaodong Wang: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Jun Luo: Tianjin University of Technology
Botao Qiao: Dalian Institute of Chemical Physics, Chinese Academy of Sciences
Jun Li: Tsinghua University
Tao Zhang: Dalian Institute of Chemical Physics, Chinese Academy of Sciences

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Surface-supported isolated atoms in single-atom catalysts (SACs) are usually stabilized by diverse defects. The fabrication of high-metal-loading and thermally stable SACs remains a formidable challenge due to the difficulty of creating high densities of underpinning stable defects. Here we report that isolated Pt atoms can be stabilized through a strong covalent metal-support interaction (CMSI) that is not associated with support defects, yielding a high-loading and thermally stable SAC by trapping either the already deposited Pt atoms or the PtO2 units vaporized from nanoparticles during high-temperature calcination. Experimental and computational modeling studies reveal that iron oxide reducibility is crucial to anchor isolated Pt atoms. The resulting high concentrations of single atoms enable specific activities far exceeding those of conventional nanoparticle catalysts. This non defect-stabilization strategy can be extended to non-reducible supports by simply doping with iron oxide, thus paving a new way for constructing high-loading SACs for diverse industrially important catalytic reactions.

Date: 2019
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DOI: 10.1038/s41467-018-08136-3

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