Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 33, Issue 23, Pages 6865-6872Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.05.045
Keywords
Tungsten carbide; Microsphere; Platinum; Electrolysis; Cathode
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Funding
- Ministry of Science and Technology
- BK-21 program sponsored the ministry of Education
- National Research Foundation of Korea [과C6A1906, 23-2006-03-002-00] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Tungsten carbide microsphere with hexagonal close-packed W2C Structure was synthesized by a polymer-induced carburization method. The synthesis process and physicochemical properties were investigated and optimized to obtain uniform spherical morphology, high surface area and high chemisorption capacity. The tungsten carbide loaded with only 7.5 wt% of platinum was tested for cathodic hydrogen evolution from water and electrocatalytic activity was compared to commercial 20 wt% Pt/vulcan XC-72R carbon (commercial E-Tek catalyst). The current density of W2C microsphere (without Pt) was much lower than the commercial E-Tek catalyst. But, when a small amount of platinum was loaded to the W2C microsphere, the current density became higher than that of the commercial E-Tek catalyst, demonstrating synergistic effect between Pt and W2C. The activity per mass of Pt for Pt/W2C was 2.3-3.2 times higher than that of E-Tek Pt/C catalyst. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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