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Issue 45, 2017
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Effects of A-site non-stoichiometry in YxInO3+δ on the catalytic performance during methane combustion

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Abstract

A novel non-stoichiometric YxInO3+δ (YIO-x, 0.8 ≤ x ≤ 1.04) perovskite catalyst with a large number of oxygen vacancies and high specific surface area was synthesized using glycine self-propagating gel combustion. It was found that low levels of non-stoichiometry in the A site of YxInO3+δ effectively increased the amount of oxygen desorption by 39–42% when compared to the original (YIO-1) due to Y-deficiency and oxygen vacancies. Further investigations showed that the non-stoichiometry also brings a significant change to the Lewis acid sites on the surface of the sample, which confirmed to be a great promoter for the catalytic combustion of methane. In addition, the catalytic performance increased with the increasing intensity of acid sites. After 50 h of the stability test, the catalysts maintained high activity, indicating their good catalytic stability.

Graphical abstract: Effects of A-site non-stoichiometry in YxInO3+δ on the catalytic performance during methane combustion

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Publication details

The article was received on 15 Sep 2017, accepted on 29 Oct 2017 and first published on 30 Oct 2017


Article type: Paper
DOI: 10.1039/C7CP06345H
Citation: Phys. Chem. Chem. Phys., 2017,19, 30418-30428
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    Effects of A-site non-stoichiometry in YxInO3+δ on the catalytic performance during methane combustion

    Y. Xiao, W. Zhu, G. Cai, M. Chen, Y. Zheng, F. Zhong and L. Jiang, Phys. Chem. Chem. Phys., 2017, 19, 30418
    DOI: 10.1039/C7CP06345H

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