【作者】 孟辉； 沈培康；

【Author】 Hui Meng,and Pei Kang Shen State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China

【机构】 中山大学理工学院光电材料国家重点实验室；

【摘要】 <正>The oxygen reduction reaction (ORR) is an important electrochemical reaction involving in the low temperature fuel cells,oxygen sensors, metal-air batteries and the production of hydrogen peroxide. The electroreduction of oxygen on cathodic electrode in both acidic and basic solutions is always a slow reaction. The best catalyst Pt requires an overpotential of over 0.3V under reasonable operating currents. To our knowledge there were no attempts have been done to evaluate the catalytic activity of nanocrystalline tungsten carbides for oxygen reduction. It is recognized that the particle size or the surface area of the catalyst is very更多还原