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Constructing CO-immune water dissociation sites around Pt to achieve stable operation in high CO concentration environment

Author

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  • Daojun Long

    (Chongqing University)

  • Yongduo Liu

    (Chongqing University)

  • Xinyu Ping

    (Chongqing University)

  • Fadong Chen

    (Chongqing University)

  • Xiongxin Tao

    (Chongqing University)

  • Zhenyang Xie

    (Chongqing University)

  • Minjian Wang

    (Chongqing University)

  • Meng Wang

    (Chongqing University)

  • Li Li

    (Chongqing University)

  • Lin Guo

    (Research Institute of Petroleum Processing Co., Ltd., SINOPEC)

  • Siguo Chen

    (Chongqing University)

  • Zidong Wei

    (Chongqing University)

Abstract

The serious problem of carbon monoxide (CO) poisoning on the surface of Pt-based catalysts has long constrained the commercialization of proton exchange membrane fuel cells (PEMFCs). Regeneration of Pt sites by maintaining CO scavenging ability through precise construction of the surface and interface structure of the catalyst is the key to obtaining high-performance CO-resistant catalysts. Here, we used molybdenum carbide (MoCx) as the support for Pt and introduced Ru single atoms (SA-Ru) at the Pt-MoCx interface to jointly decrease the CO adsorption strength on Pt. More importantly, the MoCx and SA-Ru are immune to CO poisoning, which continuously assists in the oxidation of adsorbed CO by generating oxygen species from water dissociation. These two effects combine to confer this anode catalyst (SA-Ru@Pt/MoCx) remarkable CO tolerance and the ability to operate stably in fuel cell with high CO concentration (power output 85.5 mW cm−2@20,000 ppm CO + H2 – O2), making it possible to directly use the cheap reformed hydrogen as the fuel for PEMFCs.

Suggested Citation

  • Daojun Long & Yongduo Liu & Xinyu Ping & Fadong Chen & Xiongxin Tao & Zhenyang Xie & Minjian Wang & Meng Wang & Li Li & Lin Guo & Siguo Chen & Zidong Wei, 2024. "Constructing CO-immune water dissociation sites around Pt to achieve stable operation in high CO concentration environment," Nature Communications, Nature, vol. 15(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-51562-9
    DOI: 10.1038/s41467-024-51562-9
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