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Journal of Nanomaterials
Volume 2015, Article ID 346086, 6 pages
http://dx.doi.org/10.1155/2015/346086
Research Article

Facile Synthesis of Highly Dispersed WO3·H2O and WO3 Nanoplates for Electrocatalytic Hydrogen Evolution

1State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), Qingdao 266580, China
2College of Science, China University of Petroleum (East China), Qingdao 266580, China

Received 9 December 2014; Accepted 17 January 2015

Academic Editor: Chunyi Zhi

Copyright © 2015 Wen-Hui Hu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The highly dispersed WO3·H2O nanoplates have been synthesized by a facile hydrothermal reaction assisted by citrate acid. WO3 nanoplates have been prepared by the calcination of as-prepared WO3·H2O at 450°C. XRD data show that WO3·H2O and WO3 have good crystal structure and high purity. SEM images show that WO3·H2O and WO3 have the uniform nanoplates morphology with the edge length of about 100–150 nm. The selective absorbance of citrate acid with many OH groups onto [010] facet of tungsten oxide precursors can result in the controlled growth of WO3·H2O, thus leading to the good dispersion and small size of WO3·H2O nanoplates. The electrocatalytic activity of WO3·H2O and WO3 for hydrogen evolution reaction (HER) has been investigated in detail. The good electrocatalytic activity for HER has been obtained, which may be attributed to the good dispersion and small size of nanoplates. And the growth mechanisms of WO3·H2O and WO3 nanoplates have been discussed.