Ag-modified SmMn2O5 catalysts for CO and C3H8 oxidation

Baohuai Zhao; Baofang Jin; Xiaodong Wu; Duan Weng; Rui Ran

Catalysis Communications (Jul 2022)

Ag-modified SmMn2O5 catalysts for CO and C3H8 oxidation

Baohuai Zhao,
Baofang Jin,
Xiaodong Wu,
Duan Weng,
Rui Ran

Affiliations

Baohuai Zhao: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; Institute of Engineering Technology, SINOPEC Catalyst Co., Ltd., Beijing 101111, China
Baofang Jin: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Corresponding author at: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China.
Xiaodong Wu: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Duan Weng: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
Rui Ran: Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China; Corresponding author.

Journal volume & issue: Vol. 167
p. 106456

Abstract

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A series of Sm-Mn oxides (SmMnO3, SmMn2O5 and Sm0.9Ag0.1Mn2O5) of perovskite-type and mullite crystal phases were synthesized for the catalytic oxidation of CO and C3H8. The Sm0.9Ag0.1Mn2O5 composition showed the highest catalytic activity among the series of solids, especially for the CO oxidation to CO2 with T50 and T90 values of 60 and 95 °C, respectively. The catalysts were characterized by powder XRD, Raman, BET, XPS, and H2-TPR. It was found that the catalytic performance of the solids was correlated well with their redox properties. Synergetic effects between Ag-related species and the mullite phase resulted in more active surface oxygen species and remarkably lowered the reduction temperature of the Sm0.9Ag0.1Mn2O5 solid.

Published in Catalysis Communications

ISSN: 1566-7367 (Print); 1873-3905 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Chemistry
Website: https://www.journals.elsevier.com/catalysis-communications

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