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Direct methane protonic ceramic fuel cells with self-assembled Ni-Rh bimetallic catalyst

Author

Listed:
  • Kyungpyo Hong

    (Yonsei University)

  • Mingi Choi

    (Seoul National University of Science & Technology)

  • Yonggyun Bae

    (Yonsei University
    Korea Institute of Machinery & Materials)

  • Jihong Min

    (Yonsei University)

  • Jaeyeob Lee

    (Sungkyunkwan University (SKKU))

  • Donguk Kim

    (Sungkyunkwan University (SKKU))

  • Sehee Bang

    (Sungkyunkwan University (SKKU))

  • Han-Koo Lee

    (Pohang University of Science and Technology (POSTECH))

  • Wonyoung Lee

    (Sungkyunkwan University (SKKU)
    Sungkyunkwan University)

  • Jongsup Hong

    (Yonsei University)

Abstract

Direct methane protonic ceramic fuel cells are promising electrochemical devices that address the technical and economic challenges of conventional ceramic fuel cells. However, Ni, a catalyst of protonic ceramic fuel cells exhibits sluggish reaction kinetics for CH4 conversion and a low tolerance against carbon-coking, limiting its wider applications. Herein, we introduce a self-assembled Ni-Rh bimetallic catalyst that exhibits a significantly high CH4 conversion and carbon-coking tolerance. It enables direct methane protonic ceramic fuel cells to operate with a high maximum power density of ~0.50 W·cm−2 at 500 °C, surpassing all other previously reported values from direct methane protonic ceramic fuel cells and even solid oxide fuel cells. Moreover, it allows stable operation with a degradation rate of 0.02%·h−1 at 500 °C over 500 h, which is ~20-fold lower than that of conventional protonic ceramic fuel cells (0.4%·h−1). High-resolution in-situ surface characterization techniques reveal that high-water interaction on the Ni-Rh surface facilitates the carbon cleaning process, enabling sustainable long-term operation.

Suggested Citation

  • Kyungpyo Hong & Mingi Choi & Yonggyun Bae & Jihong Min & Jaeyeob Lee & Donguk Kim & Sehee Bang & Han-Koo Lee & Wonyoung Lee & Jongsup Hong, 2023. "Direct methane protonic ceramic fuel cells with self-assembled Ni-Rh bimetallic catalyst," Nature Communications, Nature, vol. 14(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-43388-8
    DOI: 10.1038/s41467-023-43388-8
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    References listed on IDEAS

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    1. Sihyuk Choi & Chris J. Kucharczyk & Yangang Liang & Xiaohang Zhang & Ichiro Takeuchi & Ho-Il Ji & Sossina M. Haile, 2018. "Exceptional power density and stability at intermediate temperatures in protonic ceramic fuel cells," Nature Energy, Nature, vol. 3(3), pages 202-210, March.
    2. Yu Chen & Ben deGlee & Yu Tang & Ziyun Wang & Bote Zhao & Yuechang Wei & Lei Zhang & Seonyoung Yoo & Kai Pei & Jun Hyuk Kim & Yong Ding & P. Hu & Franklin Feng Tao & Meilin Liu, 2018. "A robust fuel cell operated on nearly dry methane at 500 °C enabled by synergistic thermal catalysis and electrocatalysis," Nature Energy, Nature, vol. 3(12), pages 1042-1050, December.
    3. Wenjuan Bian & Wei Wu & Baoming Wang & Wei Tang & Meng Zhou & Congrui Jin & Hanping Ding & Weiwei Fan & Yanhao Dong & Ju Li & Dong Ding, 2022. "Revitalizing interface in protonic ceramic cells by acid etch," Nature, Nature, vol. 604(7906), pages 479-485, April.
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