CeO2-ZrO2-Sm2O3 mixed oxide nanomaterials as anodes for IT-SOFCs (O-7FC)

ROSARIO SUAREZ ANZORENA; LUCIA M. TOSCANI; SANTIAGO J. MESSINA, ALFREDO JUAN, SUSANA A. LARRONDO, BEATRIZ L. IRIGOYEN, NORMA E.AMADEO

Buenos Aires

Simposio; 8th Symposium on Hydrogen, Fuel Cells and Advanced Batteries; 2022

CeO2 is a widely used material due to its excellent ability to store or release oxygen from its structure depending on the surrounding atmosphere. Doping with ZrO2 promotes thermal stability and Reduction capability [2]. In particular, the mixed oxide Ce0.9Zr0.1O2 has shown to have excellent redox and catalytic properties [3-5]. However, the need to improve its conductivity (ionic and electronic) in reducing atmospheres has been reported [5]. In this sense, partial substitution of Zr4+ by Sm3+ is proposed to incorporate oxygen vacancies in the oxide structure which might improve the mixed conductivity. In this work, we analyze the effect of Sm doping in nanocrystalline Ce0.9Zr0.1-xSmxO2-x/2 mixed oxides on their electrochemical performance as anode materials in several fuel compositions and temperatures.