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Issue 45, 2019
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Modulating the surface defects of titanium oxides and consequent reactivity of Pt catalysts

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Abstract

In heterogeneous catalysis, it is widely believed that the surface states of catalyst supports can strongly influence the catalytic performance, because active components are generally anchored on supports. This paper describes a detailed understanding of the influence of surface defects of TiO2 supports on the catalytic properties of Pt catalysts. Pt was deposited on reduced (r-), hydroxylated (h-), and oxidized (o-) TiO2 surfaces, respectively, and the different surface states of TiO2 not only lead to differences in metal dispersion, but also distinct electronic interactions between the metal and the support. The highest reactivity for catalytic CO oxidation can be achieved over the Pt catalyst supported on reduced TiO2 with surface oxygen vacancies. The turnover frequency (TOF) of this catalyst is determined to be ∼11 times higher than that of Pt supported on oxidized TiO2. More importantly, the reactivity is seen to increase in the sequence of Pt/o-TiO2 < Pt/h-TiO2 < Pt/r-TiO2, which is well consistent with the trend of the calculated Bader charge of Pt.

Graphical abstract: Modulating the surface defects of titanium oxides and consequent reactivity of Pt catalysts

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Supplementary files

Article information


Submitted
24 Jun 2019
Accepted
24 Sep 2019
First published
27 Sep 2019

This article is Open Access
All publication charges for this article have been paid for by the Royal Society of Chemistry

Chem. Sci., 2019,10, 10531-10536
Article type
Edge Article

Modulating the surface defects of titanium oxides and consequent reactivity of Pt catalysts

Y. Wang, S. Liu, C. Pei, Q. Fu, Z. Zhao, R. Mu and J. Gong, Chem. Sci., 2019, 10, 10531
DOI: 10.1039/C9SC03119G

This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

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    [Original citation] - Published by The Royal Society of Chemistry.

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