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Nanoscale kinetics of asymmetrical corrosion in core-shell nanoparticles

Author

Listed:
  • Hao Shan

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Wenpei Gao

    (University of California, Irvine)

  • Yalin Xiong

    (School of Materials Science & Engineering, Zhejiang University, Hangzhou
    Chemistry & Physics Center, National Institute of Clean-and-Low-Carbon Energy)

  • Fenglei Shi

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Yucong Yan

    (School of Materials Science & Engineering, Zhejiang University, Hangzhou)

  • Yanling Ma

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Wen Shang

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Peng Tao

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Chengyi Song

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Tao Deng

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

  • Hui Zhang

    (School of Materials Science & Engineering, Zhejiang University, Hangzhou)

  • Deren Yang

    (School of Materials Science & Engineering, Zhejiang University, Hangzhou)

  • Xiaoqing Pan

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

  • Jianbo Wu

    (School of Materials Science and Engineering, Shanghai Jiao Tong University)

Abstract

Designing new materials and structure to sustain the corrosion during operation requires better understanding on the corrosion dynamics. Observation on how the corrosion proceeds in atomic scale is thus critical. Here, using a liquid cell, we studied the real-time corrosion process of palladium@platinum (Pd@Pt) core-shell nanocubes via transmission electron microscopy (TEM). The results revealed that multiple etching pathways operatively contribute to the morphology evolution during corrosion, including galvanic etching on non-defected sites with slow kinetics and halogen-induced etching at defected sites at faster rates. Corners are the preferential corrosion sites; both etching pathways are mutually restricted during corrosion. Those insights on the interaction of nanostructures with reactive liquid environments can help better engineer the surface structure to improve the stability of electrocatalysts as well as design a new porous structure that may provide more active sites for catalysis.

Suggested Citation

  • 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.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03372-z
    DOI: 10.1038/s41467-018-03372-z
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