4.7 Article

Preparation and Characterization of Zirconia-Coated Nanodiamonds as a Pt Catalyst Support for Methanol Electro-Oxidation

期刊

NANOMATERIALS
卷 6, 期 12, 页码 -

出版社

MDPI
DOI: 10.3390/nano6120234

关键词

nanodiamond; ZrO2 shell; deposition; Pt nanoparticles; oxidation

资金

  1. National Natural Science Foundation of China [51475175, U1305241]
  2. Specialized Research Fund for the Doctoral Program of Higher Education [20133501130001]

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Zirconia-coated nanodiamond (ZrO2/ND) electrode material was successfully prepared by one-step isothermal hydrolyzing from ND-dispersed ZrOCl(2)8H(2)O aqueous solution. High-resolution transmission electron microscopy reveals that a highly conformal and uniform ZrO2 shell was deposited on NDs by this simple method. The coating obtained at 90 degrees C without further calcination was mainly composed of monoclinic nanocrystalline ZrO2 rather than common amorphous Zr(OH)(4) clusters. The ZrO2/NDs and pristine ND powder were decorated with platinum (Pt) nanoparticles by electrodeposition from 5 mM chloroplatinic acid solution. The electrochemical studies indicate that Pt/ZrO2/ND catalysts have higher electrocatalytic activity and better stability for methanol oxidation than Pt/ND catalysts in acid.

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