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- Title
Amorphous Boron Dispersed in LaCoO<sub>3</sub> with Large Oxygen Vacancies for Efficient Catalytic Propane Oxidation.
- Authors
Zheng, Yingbin; Chen, Yinye; Wu, Enhui; Liu, Xinping; Huang, Baoquan; Xue, Hun; Cao, Changlin; Luo, Yongjin; Qian, Qingrong; Chen, Qinghua
- Abstract
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 LaCoO3 crystal through an easy sol‐gel method to create more oxygen defects, which are conducive to the catalytic performance of propane (C3H8) oxidation. It reveals that moderate addition of boron successfully induces a high distortion of the LaCoO3 crystal, decreases the perovskite particle size, and produces a large proportion of bulk Co2+ species corresponding to abundant oxygen vacancies. Additionally, surface Co3+ species, as the acid sites, which are active for cleaving the C−H bonds of C3H8 molecules, are enriched. As a result, the LCB‐7 (molar ratio of Co/B=0.93:0.07) displays the best C3H8 oxidation activity. Simultaneously, the above catalyst exhibits superior thermal stability against CO2 and H2O, 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.
- Publication
Chemistry - A European Journal, 2021, Vol 27, Issue 14, p4738
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202004848