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Volume 38 Issue 5
Jul.  2021
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Article Contents
CHEN Ke, JI Zhen, ZHANG Yi-fan, JIA Cheng-chang, YANG Shan-wu. Invalidation analysis of Ag@Pt core-shell nanoparticle catalysts in the electrocatalytic process[J]. Chinese Journal of Engineering, 2016, 38(5): 714-720. doi: 10.13374/j.issn2095-9389.2016.05.017
Citation: CHEN Ke, JI Zhen, ZHANG Yi-fan, JIA Cheng-chang, YANG Shan-wu. Invalidation analysis of Ag@Pt core-shell nanoparticle catalysts in the electrocatalytic process[J]. Chinese Journal of Engineering, 2016, 38(5): 714-720. doi: 10.13374/j.issn2095-9389.2016.05.017

Invalidation analysis of Ag@Pt core-shell nanoparticle catalysts in the electrocatalytic process

doi: 10.13374/j.issn2095-9389.2016.05.017
  • Received Date: 2015-05-25
    Available Online: 2021-07-10
  • Ag@Pt core-shell nanoparticles(Ag@Pt NPs) composed of an Ag nanoparticle core and a Pt shell were prepared by the seed-mediated growth method and self-assembly technology. The electrocatalytic properties of Ag@Pt NPs to methanol before and after invalidation were measured and compared during the electrocatalytic process. The invalidation mechanism was studied by transmission electron microscopy,high-resolution electron microscopy,and X-ray photoelectron spectroscopy. The results show that the cavitation phenomena of Ag@Pt NPs occur during the cyclic voltammetry process with a threshold voltage of 0.5 V and become more obvious with the increase of time. Ag@Pt particles turn into Pt hollow shells coated by Ag after cavitation,which is the reason that the catalytic property of Ag@Pt NPs to methanol distinctly decreases during the electrocatalytic process.

     

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      沈陽化工大學材料科學與工程學院 沈陽 110142

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