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Amorphous Boron Dispersed in LaCoO 3 with Large Oxygen Vacancies for Efficient Catalytic Propane Oxidation
Author(s) -
Zheng Yingbin,
Chen Yinye,
Wu Enhui,
Liu Xinping,
Huang Baoquan,
Xue Hun,
Cao Changlin,
Luo Yongjin,
Qian Qingrong,
Chen Qinghua
Publication year - 2021
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202004848
Subject(s) - catalysis , amorphous solid , propane , boron , oxygen , perovskite (structure) , materials science , catalytic oxidation , inorganic chemistry , crystal (programming language) , oxidation state , oxide , chemical engineering , chemistry , crystallography , organic chemistry , metallurgy , computer science , engineering , programming language
Unsatisfactory oxygen mobility is a considerable barrier to the development of perovskites for low‐temperature volatile organic compounds (VOCs) oxidation. This work introduced small amounts of dispersed non‐metal boron into the LaCoO 3 crystal through an easy sol‐gel method to create more oxygen defects, which are conducive to the catalytic performance of propane (C 3 H 8 ) oxidation. It reveals that moderate addition of boron successfully induces a high distortion of the LaCoO 3 crystal, decreases the perovskite particle size, and produces a large proportion of bulk Co 2+ species corresponding to abundant oxygen vacancies. Additionally, surface Co 3+ species, as the acid sites, which are active for cleaving the C−H bonds of C 3 H 8 molecules, are enriched. As a result, the LCB‐7 (molar ratio of Co/B=0.93:0.07) displays the best C 3 H 8 oxidation activity. Simultaneously, the above catalyst exhibits superior thermal stability against CO 2 and H 2 O, lasting 200 h. This work provides a new strategy for modifying the catalytic VOCs oxidation performance of perovskites by the regulation of amorphous boron dispersion.

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