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Nanomaterials 2016, 6(12), 234; doi:10.3390/nano6120234

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

1
Institute of Manufacturing Engineering, Huaqiao University, Xiamen 361021, China
2
State Key Laboratory of Metastable Materials Science & Technology, Yanshan University, Qinhuangdao 066004, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Hermenegildo García
Received: 9 October 2016 / Revised: 16 November 2016 / Accepted: 24 November 2016 / Published: 2 December 2016
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Abstract

Zirconia-coated nanodiamond (ZrO2/ND) electrode material was successfully prepared by one-step isothermal hydrolyzing from ND-dispersed ZrOCl2·8H2O 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 °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. View Full-Text
Keywords: nanodiamond; ZrO2 shell; deposition; Pt nanoparticles; oxidation nanodiamond; ZrO2 shell; deposition; Pt nanoparticles; oxidation
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Lu, J.; Zang, J.; Wang, Y.; Xu, Y.; Xu, X. Preparation and Characterization of Zirconia-Coated Nanodiamonds as a Pt Catalyst Support for Methanol Electro-Oxidation. Nanomaterials 2016, 6, 234.

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