Journal
NATURE COMMUNICATIONS
Volume 12, Issue 1, Pages -Publisher
NATURE PORTFOLIO
DOI: 10.1038/s41467-021-23696-7
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Funding
- National Key Basic Research Program of China [2017YFA0403402]
- Project of the National Natural Science Foundation of China [21773288, U1932119, 21771117, 21805167]
- Taishan Scholar Project of Shandong Province of China
- Young Scholars Program of Shandong University
- Outstanding Youth Scientist Foundation of Hunan Province [2020JJ2001]
- shanghai large Scientific facilities center [Y92G021221]
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By adding bismuth as a dopant to form platinum-bismuth clusters on silica, researchers have discovered a highly active catalyst for CO oxidation at low temperatures. The catalyst exhibited a high CO2 production rate and demonstrated surface Pt-O-Bi structure as the active site for CO oxidation via electron transformation between platinum atoms and carbon monoxide. These findings provide a unique and general approach for designing potential excellent performance catalysts for redox reactions.
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 degrees 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 (similar to 50 degrees C) with a high CO2 production rate of 487 mu mol(CO2)center dot g(Pt)(-1)center dot s(-1) at 110 degrees 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.
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