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Direct in-situ imaging of electrochemical corrosion of Pd-Pt core-shell electrocatalysts

Author

Listed:
  • Fenglei Shi

    (Shanghai Jiao Tong University)

  • Peter Tieu

    (University of California, Irvine)

  • Hao Hu

    (Shanghai Jiao Tong University)

  • Jiaheng Peng

    (Shanghai Jiao Tong University)

  • Wencong Zhang

    (Shanghai Jiao Tong University)

  • Fan Li

    (Shanghai Jiao Tong University)

  • Peng Tao

    (Shanghai Jiao Tong University)

  • Chengyi Song

    (Shanghai Jiao Tong University)

  • Wen Shang

    (Shanghai Jiao Tong University)

  • Tao Deng

    (Shanghai Jiao Tong University)

  • Wenpei Gao

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

  • Xiaoqing Pan

    (University of California, Irvine
    University of California, Irvine)

  • Jianbo Wu

    (Shanghai Jiao Tong University
    Shanghai Jiao Tong University
    Shanghai Jiao Tong University)

Abstract

Corrosion of electrocatalysts during electrochemical operations, such as low potential - high potential cyclic swapping, can cause significant performance degradation. However, the electrochemical corrosion dynamics, including structural changes, especially site and composition specific ones, and their correlation with electrochemical processes are hidden due to the insufficient spatial-temporal resolution characterization methods. Using electrochemical liquid cell transmission electron microscopy, we visualize the electrochemical corrosion of Pd@Pt core-shell octahedral nanoparticles towards a Pt nanoframe. The potential-dependent surface reconstruction during multiple continuous in-situ cyclic voltammetry with clear redox peaks is captured, revealing an etching and deposition process of Pd that results in internal Pd atoms being relocated to external surface, followed by subsequent preferential corrosion of Pt (111) terraces rather than the edges or corners, simultaneously capturing the structure evolution also allows to attribute the site-specific Pt and Pd atomic dynamics to individual oxidation and reduction events. This work provides profound insights into the surface reconstruction of nanoparticles during complex electrochemical processes.

Suggested Citation

  • Fenglei Shi & Peter Tieu & Hao Hu & Jiaheng Peng & Wencong Zhang & Fan Li & Peng Tao & Chengyi Song & Wen Shang & Tao Deng & Wenpei Gao & Xiaoqing Pan & Jianbo Wu, 2024. "Direct in-situ imaging of electrochemical corrosion of Pd-Pt core-shell electrocatalysts," Nature Communications, Nature, vol. 15(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-49434-3
    DOI: 10.1038/s41467-024-49434-3
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    References listed on IDEAS

    as
    1. Mark K. Debe, 2012. "Electrocatalyst approaches and challenges for automotive fuel cells," Nature, Nature, vol. 486(7401), pages 43-51, June.
    2. Hao Shan & Wenpei Gao & Yalin Xiong & Fenglei Shi & Yucong Yan & Yanling Ma & Wen Shang & Peng Tao & Chengyi Song & Tao Deng & Hui Zhang & Deren Yang & Xiaoqing Pan & Jianbo Wu, 2018. "Nanoscale kinetics of asymmetrical corrosion in core-shell nanoparticles," Nature Communications, Nature, vol. 9(1), pages 1-9, December.
    3. Xue Wang & Sang-Il Choi & Luke T. Roling & Ming Luo & Cheng Ma & Lei Zhang & Miaofang Chi & Jingyue Liu & Zhaoxiong Xie & Jeffrey A. Herron & Manos Mavrikakis & Younan Xia, 2015. "Palladium–platinum core-shell icosahedra with substantially enhanced activity and durability towards oxygen reduction," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
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