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Influence of lattice oxygen on the catalytic activity of blue titania supported Pt catalyst for CO oxidation

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Title
Influence of lattice oxygen on the catalytic activity of blue titania supported Pt catalyst for CO oxidation
Author(s)
Hanseul Choi; Jinsun Lee; Daeho Kim; Ashwani Kumar; Beomgyun Jeong; Ki-Jeong Kim; Hyoyoung Lee; Jeong Young Park
Publication Date
2021-03
Journal
Catalysis Science and Technology, v.11, no.5, pp.1698 - 1708
Publisher
Royal Society of Chemistry
Abstract
© The Royal Society of Chemistry 2021.Despite extensive research into understanding the reaction mechanism for CO oxidation over transition metals supported on TiO2, the active species for oxidation remains controversial. Herein, the characteristics of the active oxygen species of blue TiO2with a higher concentration of oxygen vacancies as a model catalyst with deposited nano-sized Pt toward CO oxidation are unraveled. Pt deposited on blue TiO2showed 8.8 times higher catalytic activity than that on TiO2at 200 °C. Formation of the oxygen vacancies induced electron generation, and the electrons were transferred to CO, weakening the binding strength. The ratio of lattice oxygen on the top surface of Pt/blue TiO2decreased from 50.4% before the reaction to 6.1% during the reaction, as analyzed by near ambient pressure X-ray photoelectron spectroscopy. The results directly show that the facile reducibility of surface lattice oxygen of blue TiO2leads to the high activity of CO oxidation.
URI
https://pr.ibs.re.kr/handle/8788114/9544
DOI
10.1039/d0cy02166k
ISSN
2044-4753
Appears in Collections:
Center for Nanomaterials and Chemical Reactions(나노물질 및 화학반응 연구단) > 1. Journal Papers (저널논문)
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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