Journal
ELECTROCHIMICA ACTA
Volume 59, Issue -, Pages 105-112Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.10.044
Keywords
SPE water electrolysis; Electrocatalytic; Iridium-tin oxide; Adams method
Categories
Funding
- National Research and Development Program of China (863Program) [2007AA05Z150]
- National Natural Science Foundation [91010002, 50874008]
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Electrocatalysts made of IrO2/SnO2 were prepared using the Adams method for solid polymer electrolyte (SPE) water electrolysis. The physicochemical properties of the catalyst were characterized via X-ray diffraction (XRD) and transmission electron microscopy (TEM). The electrochemical properties of the catalyst were investigated using cyclic voltammetry (CV), electrochemical impendence spectroscopy (EIS), chronopotentiometry and Tafel curve measurements in 0.1 mol L-1 H2SO4 at room temperature. The test results showed that the catalytic properties of IrO2/SnO2 depended on the mass ratio of iridium to tin, and that the optimal mass ratio was 2:1. The optimized catalyst was applied to a membrane electrode assembly (MEA), and the stationary current-potential relationships were determined. With an IrO2/SnO2 (2:1) anode, a 40% Pt/C cathode and a total noble metal (Ir, Pt) loading of 1.2 mg cm(-2), the terminal applied potential difference of the water electrolysis was 1.70 V at 2 A cm(-2) and 80 degrees C. (C) 2011 Elsevier Ltd. All rights reserved.
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