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Insights into the Low‐temperature Synthesis of LaCoO 3 Derived from Co(CH 3 COO) 2 via Electrospinning for Catalytic Propane Oxidation
Author(s) -
Zheng Yingbin,
Feng Xiaoshan,
Lin Daifeng,
Wu Enhui,
Luo Yongjin,
You Yufeng,
Huang Baoquan,
Qian Qingrong,
Chen Qinghua
Publication year - 2020
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201900393
Subject(s) - propane , chemistry , catalysis , decomposition , x ray photoelectron spectroscopy , catalytic oxidation , perovskite (structure) , thermal decomposition , activation energy , thermal stability , oxidation state , chemical engineering , inorganic chemistry , organic chemistry , engineering
Summary of main observation and conclusion A series of electrospun LaCoO 3 perovskites derived from CoX 2 (X = CH 3 COO – , NO 3 – ) were prepared and investigated for total propane oxidation. It is shown that pure rhombohedral perovskite LaCoO 3 from Co(CH 3 COO) 2 can be obtained at a relatively low temperature, 400 °C, benefitting from the complexation effect of CH 3 COO – . On the other hand, CH 3 COO – can accelerate the complete decomposition of polymer. The low‐temperature process can protect LaCoO 3 nanoparticles from growing up. As a result, Co(CH 3 COO) 2 ‐derived catalysts exhibit better propane oxidation activity than the ones suffered the same thermal treatment by using Co(NO 3 ) 2 . XPS and H 2 ‐TPR analysis provide that there is subtle change in Co 3+ /Co 2+ on bulk/surface of Co(CH 3 COO) 2 ‐derived catalysts prepared at different temperatures, giving rise to similar propane oxidation activities. Moreover, the result of cyclic stability test over 400 °C obtained catalyst shows little deactivation, demonstrating a good thermal stability. Our study can provide a feasible route for energy‐saving synthesis of LaCoO 3 catalyst applied in the catalytic oxidation of volatile organic compounds (VOCs).