Unique structure of active platinum-bismuth site for oxidation of carbon monoxide

Bing Nan, Qiang Fu, Jing Yu, Miao Shu, Lu-Lu Zhou, Jinying Li, Wei-Wei Wang, Chun-Jiang Jia (), Chao Ma (), Jun-Xiang Chen, Lina Li and Rui Si ()
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Bing Nan: Chinese Academy of Sciences
Qiang Fu: Shandong University
Jing Yu: Shanghai Institute of Measurement and Testing Technology
Miao Shu: Chinese Academy of Sciences
Lu-Lu Zhou: Shandong University
Jinying Li: Shandong University
Wei-Wei Wang: Shandong University
Chun-Jiang Jia: Shandong University
Chao Ma: Hunan University
Jun-Xiang Chen: TILON Group Technology Limited
Lina Li: Chinese Academy of Sciences
Rui Si: Chinese Academy of Sciences

Nature Communications, 2021, vol. 12, issue 1, 1-11

Abstract: Abstract As the technology development, the future advanced combustion engines must be designed to perform at a low temperature. Thus, it is a great challenge to synthesize high active and stable catalysts to resolve exhaust below 100 °C. Here, we report that bismuth as a dopant is added to form platinum-bismuth cluster on silica for CO oxidation. The highly reducible oxygen species provided by surface metal-oxide (M-O) interface could be activated by CO at low temperature (~50 °C) with a high CO2 production rate of 487 μmolCO2·gPt−1·s−1 at 110 °C. Experiment data combined with density functional calculation (DFT) results demonstrate that Pt cluster with surface Pt−O−Bi structure is the active site for CO oxidation via providing moderate CO adsorption and activating CO molecules with electron transformation between platinum atom and carbon monoxide. These findings provide a unique and general approach towards design of potential excellent performance catalysts for redox reaction.

Date: 2021
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DOI: 10.1038/s41467-021-23696-7

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