Electrocatalysis by nanocrystalline tungsten carbides and the effects of codeposited silver

被引：45
作者：
Brady, C. D. A. [1 ]
Rees, E. J. [1 ]
Burstein, G. T. [1 ]
机构：
[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
来源：
JOURNAL OF POWER SOURCES | 2008年 / 179卷 / 01期
关键词：
tungsten carbide; electrocatalysis; passivity; hydrogen oxidation; base electrocatalyst;
D O I：
10.1016/j.jpowsour.2008.01.002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrocatalytic activity of two nanocrystalline tungsten carbides, WC and W2C, towards the anodic oxidation of hydrogen in 1.5 M H2SO4 at 65 degrees C is presented. The carbides, which were synthesised by solid-state reduction of W(VI) using carbon, are both electrocatalytic. The WC phase shows greater electrocatalysis than the W2C phase, and also shows a greater degree of passivity against corrosion in the hot sulphuric acid electrolytes. The effect of codeposited silver is to enhance the electrocatalytic activity of the WC phase, whilst not in itself showing any clectrocatalysis. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：17 / 26
页数：10
相关论文
共 25 条
  • [1] Electrocatalysts for fuel cells
    Acres, GJK
    Frost, JC
    Hards, GA
    Potter, RJ
    Ralph, TR
    Thompsett, D
    Burstein, GT
    Hutchings, GJ
    [J]. CATALYSIS TODAY, 1997, 38 (04) : 393 - 400
  • [2] Electrocatalytic activity of some carburised nickel, tungsten and molybdenum compounds
    Barnett, CJ
    Burstein, GT
    Kucernak, ARJ
    Williams, KR
    [J]. ELECTROCHIMICA ACTA, 1997, 42 (15) : 2381 - 2388
  • [3] ELECTRONIC AND CATALYTIC PROPERTIES OF TUNGSTEN CARBIDE
    BENNETT, LH
    CUTHILL, JR
    MCALISTER, AJ
    ERICKSON, NE
    [J]. SCIENCE, 1975, 187 (4179) : 858 - 859
  • [4] Aspects of the anodic oxidation of methanol
    Burstein, GT
    Barnett, CJ
    Kucernak, AR
    Williams, KR
    [J]. CATALYSIS TODAY, 1997, 38 (04) : 425 - 437
  • [5] Anodic oxidation of methanol using a new base electrocatalyst
    Burstein, GT
    Barnett, CJ
    Kucernak, ARJ
    Williams, KR
    [J]. JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1996, 143 (07) : L139 - L140
  • [6] LOW-TEMPERATURE ELECTRICAL PROPERTIES OF SOME TRANSITION METALS AND TRANSITION-METAL CARBIDES
    CLINARD, FW
    KEMPTER, CP
    [J]. JOURNAL OF THE LESS-COMMON METALS, 1968, 15 (01): : 59 - &
  • [7] Gupta S., 1999, J ELECTROANAL CHEM, V462, P63
  • [8] A new one-dimensional tungsten carbide nanostructured material
    Keller, N
    Pietruszka, B
    Keller, V
    [J]. MATERIALS LETTERS, 2006, 60 (13-14) : 1774 - 1777
  • [9] KHONG H, 2006, ELECTROCHEM COMMUN, V8, P707
  • [10] KHONG H, 2007, J POWER SOURCES, V164, P572
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