Study of the heterogeneous decomposition of hydrogen peroxide: its application to the development of carbon-based oxygen cathodes

H. FALCÓN; R. E. CARBONIO

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Lugar: Amsterdam; Año: 1992 vol. 339 p. 69 - 69

p style="TEXT-ALIGN: justify; LINE-HEIGHT: normal; MARGIN: 0cm 0cm 0pt; TEXT-AUTOSPACE: ; mso-layout-grid-align: none" class="MsoNormal">The heterogeneous decomposition of hydrogen peroxide was studied in alkaline electrolytes on LaFexNi1-x03 perovskite-type oxides. The reaction is first order in HO2-, concentration. Maximum catalytic activity was found for x = 0.25. This increase in activity was attributed to the appearance of mixed oxidation states of iron and nickel. The optimum temperature of synthesis was between 600°C and 700°C, this being a compromise between a sufficiently high temperature to synthesize the perovskite structure and a sufficiently low temperature to produce a high surface area catalyst with a low number of oxygen vacancies. The catalytic activity for O2 reductio