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Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations

Author

Listed:
  • Xiaochen Shen

    (The University of Akron)

  • Changlin Zhang

    (The University of Akron)

  • Shuyi Zhang

    (University of Michigan
    University of California-Irvine)

  • Sheng Dai

    (University of Michigan
    University of California-Irvine)

  • Guanghui Zhang

    (Purdue University)

  • Mingyuan Ge

    (Brookhaven National Laboratory)

  • Yanbo Pan

    (The University of Akron)

  • Stephen M. Sharkey

    (The University of Akron)

  • George W. Graham

    (University of Michigan
    University of California-Irvine)

  • Adrian Hunt

    (Brookhaven National Laboratory)

  • Iradwikanari Waluyo

    (Brookhaven National Laboratory)

  • Jeffrey T. Miller

    (Purdue University)

  • Xiaoqing Pan

    (University of California-Irvine
    University of California-Irvine)

  • Zhenmeng Peng

    (The University of Akron)

Abstract

Understanding the growth pathway of faceted alloy nanoparticles at the atomic level is crucial to morphology control and property tuning. Yet, it remains a challenge due to complexity of the growth process and technical limits of modern characterization tools. We report a combinational use of multiple cutting-edge in situ techniques to study the growth process of octahedral Pt3Ni nanoparticles, which reveal the particle growth and facet formation mechanisms. Our studies confirm the formation of octahedral Pt3Ni initiates from Pt nuclei generation, which is followed by continuous Pt reduction that simultaneously catalyzes Ni reduction, resulting in mixed alloy formation with moderate elemental segregation. Carbon monoxide molecules serve as a facet formation modulator and induce Ni segregation to the surface, which inhibits the (111) facet growth and causes the particle shape to evolve from a spherical cluster to an octahedron as the (001) facet continues to grow.

Suggested Citation

  • Xiaochen Shen & Changlin Zhang & Shuyi Zhang & Sheng Dai & Guanghui Zhang & Mingyuan Ge & Yanbo Pan & Stephen M. Sharkey & George W. Graham & Adrian Hunt & Iradwikanari Waluyo & Jeffrey T. Miller & Xi, 2018. "Deconvolution of octahedral Pt3Ni nanoparticle growth pathway from in situ characterizations," Nature Communications, Nature, vol. 9(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-06900-z
    DOI: 10.1038/s41467-018-06900-z
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    Cited by:

    1. Hui Jin & Zhewei Xu & Zhi-Yi Hu & Zhiwen Yin & Zhao Wang & Zhao Deng & Ping Wei & Shihao Feng & Shunhong Dong & Jinfeng Liu & Sicheng Luo & Zhaodong Qiu & Liang Zhou & Liqiang Mai & Bao-Lian Su & Dong, 2023. "Mesoporous Pt@Pt-skin Pt3Ni core-shell framework nanowire electrocatalyst for efficient oxygen reduction," Nature Communications, Nature, vol. 14(1), pages 1-10, December.

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