Electrocatalytic Activity of Nanoporous Perovskite La1-xCaxCoO3 Towards Hydrogen Peroxide Reduction in Alkaline Medium

Shuxin Zhuang; Suqin Liu; Chenghuan Huang; Feiyue Tu; Jinbao Zhang; Yanhua Li
January 2012
International Journal of Electrochemical Science;Jan2012, Vol. 7 Issue 1, p338
Academic Journal
Perovskite-type series of La1-xCaxCoO3 compounds were synthesized by a modified amorphous citrate precursor method. Their catalytic activities for hydrogen peroxide electroreduction in 3.0 mol dm-3 KOH at 25 ºC were evaluated by cyclic voltammetry and galvanostatic measurement. The influence of x in La1-xCaxCoO3 on their catalytic performance was investigated. Among these compounds, La0.6Ca0.4CoO3 calcined at 650 °C exhibited the highest catalytic activity. An aluminum-hydrogen peroxide cell containing 0.4 mol dm-3 H2O2 as oxidant and using La0.6Ca0.4CoO3 as cathode catalyst achieved a peak power density of 201 mW cm-2 at 150 mA cm-2.


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