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Highly Effective Direct Decomposition of Nitric Oxide by Microwave Catalysis over BaMeO 3 (Me=Mn, Co, Fe) Mixed Oxides at Low Temperature under Excess Oxygen
Author(s) -
Xu Wentao,
Cai Jinjun,
Zhou Jicheng,
Ou Yingpiao,
Long Wei,
You Zhimin,
Luo Yushang
Publication year - 2016
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500966
Subject(s) - catalysis , decomposition , selectivity , chemistry , oxygen , mixed oxide , desorption , inorganic chemistry , microwave , oxide , organic chemistry , adsorption , physics , quantum mechanics
The direct catalytic decomposition of NO with high activity and N 2 selectivity is a great challenge at low temperature under excess oxygen. Herein, we report the NO decomposition by microwave catalysis over BaMeO 3 (Me=Mn, Co, Fe) mixed oxides for the first time at low temperature under excess oxygen, for which the BaCoO 3 catalyst has an outstanding activity with a high NO conversion and N 2 selectivity up to 99.8 % and 99.9 %, respectively, even at 250 °C. Comparatively, the best NO conversion is 93.7 % for BaMnO 3 and only 64.1 % for BaFeO 3 under microwave irradiation. H 2 temperature‐programmed reduction, O 2 temperature‐programmed desorption, and the microwave‐absorbing properties of the mixed oxides were characterized to illustrate possible reasons that cause such clear differences in the catalytic performance. Importantly, the apparent activation energies for BaMnO 3 , BaCoO 3 , and BaFeO 3 are as low as 33.4, 13.7, and 46.7 kJ mol −1 , respectively, which suggests a significant microwave catalytic effect.