Enhanced bifunctional activity of LaNiO3-based gas diffusion electrodes for reg...

• Author(s): Silva, R. A. ; Soares, C. O. ; Carvalho, M. D. ; Rangel, C. M. ; Pereira, M. I. da Silva
• Date: 2013
• Persistent ID: http://hdl.handle.net/10400.9/2211
• Origin: Repositório do LNEG
• Subject(s): Bifunctional oxygen catalyst ; Perovskite-type oxides; Gas diffusion electrodes; Regenerative fuel cells
• Document Type: Conference Object
• Language: English

Description

Perovskites are of great interest when searching replacements for precious metals as catalyst for bifunctional oxygen electrodes involving the oxygen evolution(OER) and oxygen reduction reaction (ORR) as is the case of regenerative fuel cells. In this work a full electrochemical study on the electrochemical properties of gas diffusion electrodes (GDEs) using LaNiO3-based catalysts, conducted in alkaline media, led to a study of cyclability and durability. The incorporation of GDEs in a low power electrolyzer/fuel cell prototype was also attempted. The stability of the electrodes was assessed by potential cycling and at constant current density with good results.