Oxygen electrocatalysts

Other experiments by Ross and co-workers [30] clearly indicate that the common metal (Co, Ni, Fe, Cr, Ru) oxides that are used for oxygen electrocatalysts also catalyze the oxidation of carbon in alkaline electrolytes. 

Carbon shows reasonable electrocatalytic activity for oxygen reduction in alkaline electrolytes, but it is a relatively poor oxygen electrocatalyst in acid electrolytes. A detailed discussion on the mechanism of... 

In Situ Spectroscopic Studies of Oxygen Electrocatalysts Involving Transition Metal Macrocycles... 

The data summarized in this paper have established that the oxide pyrochlores under discussion substantially reduce the activation energy overvoltages associated with oxygen electrocatalysis. Specifically, it is found that these catalysts, in aqueous alkaline media near ambient temperature, are superior to any other oxygen evolution catalyst and are equal in performance to the best known oxygen reduction catalysts. As bidirectional oxygen electrocatalysts, they appear to be unmatched. 

W. O Grady, C. Iwakura, and E. Yeager, Oxygen electrocatalysts for life support systems, in Proceedings of the Intersociety Conference on Environmental Systems, The American Society of Mechanical Engineers, San Diego, 1976, pp. 37-48. 

Ham, D.O., Moniz, G., and Taylor, E.J. (1988) High surface area dual function oxygen electrocatalysts for space power applications. J. Power Sources,... 

As the anion-exchange membrane fuel cell is the alkaline-based system, we can use non-platinum-based catalyst. This is a big advantage to lower the cost of fuel cells. Especially perovskite-type and pyrochlore-type oxides have high performance to oxygen-electrocatalysts which could be applicable to the cathode materials. Some oxides have also bifunctional activities as oxygen electrode catalyst to produce a reversible fuel cell thus, future deployment is expected. While, the big problems are stability of the base... 

---