[Abstract]

We demonstrate theoretically and experimentally that engineering of cation–oxygen bond strength in a perovskite structure can control redox ex-solution of B-site metals and thus the formation of metal nanoparticles at the oxide surface upon high-temperature reduction. In particular, we show that large isovalent doping significantly promotes the B-site ex-solution via tuning of the cation–oxygen bond strength, leading to high catalytic activity of CO oxidation. This method to promote ex-solution can be readily applied to various heterogeneous catalysts.

DOI: doi.org/10.1039/D0EE01308K
Link: https://pubs.rsc.org/en/content/articlelanding/2020/ee/d0ee01308k#!divAbstract