Effects of A-site non-stoichiometry in YxInO3+δ on the catalytic performance during methane combustion. Issue 45 (14th November 2017)

• Record Type: Journal Article
• Authors: Xiao, Yihong; Zhu, Wanlu; Cai, Guohui; Chen, Meilian; Zheng, Yong; Zhong, Fulan; Jiang, Lilong
• Is Part Of: Physical chemistry chemical physics. Volume 19:Issue 45(2017)
• Page Start: 30418
• Page End: 30428
• Publication Date: 2017-11-14
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c7cp06345h
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A novel non-stoichiometric Y x InO3+ 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. Abstract : A novel non-stoichiometric Y x InO3+ 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 Y x InO3+ 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.