Ba-Addition Induced Enhanced Surface Reducibility of SrTiO3: Implication on Catalytic Aspects

12 June 2019, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

This work compares the capacity of generating the surface oxygen vacancies over SrTiO3, BaTiO3 and the mixed Sr0.5Ba0.5TiO3. This aspect is elucidated by significantly different chemical states of the elements on the surface of the three materials. Along with the fundamental materials aspect, CO oxidation studies complement the highest surface reducibility of the Sr0.5Ba0.5TiO3 catalyst. With detailed adsorption-desorption studies, we report that the A-site cation substitution renders a better surface-reducibility induced catalytic activity for CO oxidation.

Keywords

surface reducibility
SrTiO3
STEM-EDS
BaTiO3/Ba50Sr50TiO3
CO oxidation catalysts

Supplementary materials

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