In situ XPD and XANES studies on Ce0.9Zr0.1-xSmxO2-x/2(x= 0.1, 0.08, 0.06, 0.04, 0.02, 0) in diluted H2 and CH4

ROSARIO SUAREZ ANZORENA; LUCÍA M. TOSCANI; SUSANA A. LARRONDO

Campinas

Congreso; 29th RAU Annual Users Meeting LNLS/CNPEM; 2019

LNLS/CNPEM

CeO2-ZrO2 mixed oxides are excellent electro-catalysts for oxidation reactions. It was reported in previous works, that the oxide with composition Ce0.9Zr0.1O2 is active as anode material for IT-SOFCs. Nevertheless, it is important to enhance its mixed conductivity (ionic-electronic) in reductive atmospheres. In this sense, the substitution of Zr4+ by Sm3+ was proposed to incorporate vacancies in the oxide structure because of the different oxidation states of both cations, which in turn could have an impact on ionic conductivity.