Control of transition metal - oxygen bond strength boosts the redox ex-solution in perovskite oxide surface
- Authors
- Kim, Kyeounghak; Koo, Bonjae; Jo, Yong-Ryun; Lee, Siwon; Kim, Jun Kyu; Kim, Bong-Joong; Jung, WooChul; Han, Jeong Woo
- Issue Date
- Oct-2020
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- ENERGY & ENVIRONMENTAL SCIENCE, v.13, no.10, pp.3404 - 3411
- Indexed
- SCIE
SCOPUS
- Journal Title
- ENERGY & ENVIRONMENTAL SCIENCE
- Volume
- 13
- Number
- 10
- Start Page
- 3404
- End Page
- 3411
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/191396
- DOI
- 10.1039/d0ee01308k
- ISSN
- 1754-5692
- 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.
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