Quantification of critical particle distance for mitigating catalyst sintering

Peng Yin, Sulei Hu, Kun Qian, Zeyue Wei, Le-Le Zhang, Yue Lin (), Weixin Huang, Haifeng Xiong, Wei-Xue Li () and Hai-Wei Liang ()
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Peng Yin: University of Science and Technology of China
Sulei Hu: University of Science and Technology of China
Kun Qian: University of Science and Technology of China
Zeyue Wei: University of Science and Technology of China
Le-Le Zhang: University of Science and Technology of China
Yue Lin: University of Science and Technology of China
Weixin Huang: University of Science and Technology of China
Haifeng Xiong: Xiamen University
Wei-Xue Li: University of Science and Technology of China
Hai-Wei Liang: University of Science and Technology of China

Nature Communications, 2021, vol. 12, issue 1, 1-10

Abstract: Abstract Supported metal nanoparticles are of universal importance in many industrial catalytic processes. Unfortunately, deactivation of supported metal catalysts via thermally induced sintering is a major concern especially for high-temperature reactions. Here, we demonstrate that the particle distance as an inherent parameter plays a pivotal role in catalyst sintering. We employ carbon black supported platinum for the model study, in which the particle distance is well controlled by changing platinum loading and carbon black supports with varied surface areas. Accordingly, we quantify a critical particle distance of platinum nanoparticles on carbon supports, over which the sintering can be mitigated greatly up to 900 °C. Based on in-situ aberration-corrected high-angle annular dark-field scanning transmission electron and theoretical studies, we find that enlarging particle distance to over the critical distance suppress the particle coalescence, and the critical particle distance itself depends sensitively on the strength of metal-support interactions.

Date: 2021
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DOI: 10.1038/s41467-021-25116-2

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