Citation: KONG Ling-Zhi, WAN Qian, XU Li, YAN Yong-Sheng, LI Hua-Ming, YANG Xiang-Guang. Action of Oxygen Vacancy in CO Catalytic Oxidation over Pt Supported Pervoshkite Oxides[J]. Chinese Journal of Inorganic Chemistry, ;2015, 31(7): 1335-1341. doi: 10.11862/CJIC.2015.163 shu

Action of Oxygen Vacancy in CO Catalytic Oxidation over Pt Supported Pervoshkite Oxides

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1 School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China;
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2 Institute for Energy Research, Jiangsu University, Zhenjiang, Jiangsu 212013, China;
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3 Changchun Institute of Appled Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Corresponding author: LI Hua-Ming, YANG Xiang-Guang,
Received Date: 5 January 2015
Available Online: 22 April 2015
Fund Project: 国家自然科学基金(No.21273221)资助项目。 (No.21273221)

LaMnO₃, LaFeO₃, La_0.5Sr_0.5MnO₃, La_0.5Sr_0.5FeO₃ were prepared by citric acid method and Pt/LaMnO₃, Pt/LaFeO₃, Pt/La_0.5Sr_0.5MnO₃, Pt/La_0.5Sr_0.5FeO₃ were prepared by impregnating nano-Pt solution to ABO₃ mixed oxides. It showed that prepared ABO₃ mixed oxides possessed pervoskite structrue from XRD and IR data, the size of nano-Pt particle was about ~3 nm and dispersed uniformly on ABO₃ mixed oxides from TEM. It was found that the redox properties determined the catalytic properties of ABO₃-type catalsysts in CO catalytic oxidation, thus, Mn-ABO₃ catalsysts gave the better activity in CO catalytic oxidation. When supported nano-Pt paricle to ABO₃- mixed oxides, Pt/Fe-ABO₃ catalsysts showed the excellent activity, the reaction temperature of 100% CO conversion was reduced from 350 ℃ to 120 ℃. Adsorption experiment indicated that oxygen vacancy on ABO₃ mixed oxides was a key factor to improve the adsorption of oxygen and to determine the properties of CO oxidation at lower reaction temperatures.
- perovskite;nano-Pt particle;redox;O₂ adsorption
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