氧在碳化钨增强的铂碳催化剂上还原(英文)

【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