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High performance catalyst for electrochemical hydrogen evolution reaction based on SiO2/WO3-x nanofacets

Title
High performance catalyst for electrochemical hydrogen evolution reaction based on SiO2/WO3-x nanofacets
Author(s)
Ketpang, KriangsakKim, MinsunKim, SoonhyunShanmugam, Sangaraju
Issued Date
2013-08
Citation
International Journal of Hydrogen Energy, v.38, no.23, pp.9732 - 9740
Type
Article
Author Keywords
NanofibersElectrospinningElectrocatalystHydrogen evolution reactionTungsten oxide
Keywords
TUNGSTEN-OXIDESPECTROSCOPYCOMPLEXES
ISSN
0360-3199
Abstract
The electrochemical hydrogen evolution reaction (HER) was studied over silica/tungsten oxide nanofacets (SiO2/WO3-x) that was prepared by calcinations of electrospun polyacrylonitrile nanofibers containing silicotungstic acid under air atmosphere. It was found that the Keggin structure of precursor (H4SiW12O40.29H2O) was decomposed and transferred to crystalline monoclinic WO3 after calcinations at 500 C. The morphology of prepared catalyst after pyrolysis, observed by FE-SEM, was nanocrystals deposited on joined nanoparticles fiber. The size of nanocrystal increases with increasing annealing time. In addition, increasing annealing time also enhances interaction between SiO2 and WO3-x. The synthesized catalyst was employed as an electrocatalyst for HER. It was found that the catalyst annealed at 500 C for 5 h showed 6.6 times higher HER activity than the bulk WO3 and exhibits excellent electrochemical stability over 100 cycles. Copyright © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/3214
DOI
10.1016/j.ijhydene.2013.05.112
Publisher
Elsevier Ltd
Related Researcher
  • 김순현 Kim, Soonhyun
  • Research Interests Photocatalysis; 광촉매; Advanced Oxidation Processes; 고도산화; Radioactive Cesium Removal/Adsorption/Monitoring; 방사성 세슘 제거/흡착/모니터링
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Appears in Collections:
Smart Textile Convergence Research Group 1. Journal Articles
Department of Energy Science and Engineering Advanced Energy Materials Laboratory 1. Journal Articles
Division of Energy & Environmental Technology 1. Journal Articles

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