Photo-thermo semi-hydrogenation of acetylene on Pd1/TiO2 single-atom catalyst

Yalin Guo, Yike Huang, Bin Zeng, Bing Han, Mohcin Akri, Ming Shi, Yue Zhao, Qinghe Li, Yang Su, Lin Li, Qike Jiang, Yi-Tao Cui, Lei Li, Rengui Li (), Botao Qiao () and Tao Zhang
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Yalin Guo: Chinese Academy of Sciences
Yike Huang: Chinese Academy of Sciences
Bin Zeng: University of Chinese Academy of Sciences
Bing Han: Chinese Academy of Sciences
Mohcin Akri: Chinese Academy of Sciences
Ming Shi: University of Chinese Academy of Sciences
Yue Zhao: Chinese Academy of Sciences
Qinghe Li: Chinese Academy of Sciences
Yang Su: Chinese Academy of Sciences
Lin Li: Chinese Academy of Sciences
Qike Jiang: Chinese Academy of Sciences
Yi-Tao Cui: SANKA High Technology Co. Ltd. 90-1
Lei Li: Hyogo Science and Technology Association
Rengui Li: Chinese Academy of Sciences
Botao Qiao: Chinese Academy of Sciences
Tao Zhang: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-12

Abstract: Abstract Semi-hydrogenation of acetylene in excess ethylene is a key industrial process for ethylene purification. Supported Pd catalysts have attracted most attention due to their superior intrinsic activity but often suffer from low selectivity. Pd single-atom catalysts (SACs) are promising to significantly improve the selectivity, but the activity needs to be improved and the feasible preparation of Pd SACs remains a grand challenge. Here, we report a simple strategy to construct Pd1/TiO2 SACs by selectively encapsulating the co-existed small amount of Pd nanoclusters/nanoparticles based on their different strong metal-support interaction (SMSI) occurrence conditions. In addition, photo-thermo catalysis has been applied to this process where a much-improved catalytic activity was obtained. Detailed characterization combined with DFT calculation suggests that photo-induced electrons transferred from TiO2 to the adjacent Pd atoms facilitate the activation of acetylene. This work offers an opportunity to develop highly stable Pd SACs for efficient catalytic semi-hydrogenation process.

Date: 2022
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DOI: 10.1038/s41467-022-30291-x

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