| Title: | Amorphous Boron Dispersed in LaCoO(3) with Large Oxygen Vacancies for Efficient Catalytic Propane Oxidation |
| Author(s): | Zheng Y; Chen Y; Wu E; Liu X; Huang B; Xue H; Cao C; Luo Y; Qian Q; Chen Q; |
| Address: | "Fujian Key Laboratory of Pollution Control & Resource Reuse, Fujian Normal University, Fuzhou, 350007, P.R. China. Fuqing Branch of Fujian Normal University, Fuqing, 350300, P.R. China" |
| ISSN/ISBN: | 1521-3765 (Electronic) 0947-6539 (Linking) |
| 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 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" |
| Keywords: | LaCoO3 amorphous boron dispersion catalytic propane oxidation durability oxygen vacancies; |
| Notes: | "PubMed-not-MEDLINEZheng, Yingbin Chen, Yinye Wu, Enhui Liu, Xinping Huang, Baoquan Xue, Hun Cao, Changlin Luo, Yongjin Qian, Qingrong Chen, Qinghua eng 2019YFC1904500/National Key Research and Development Program of China/ 21875037/National Natural Science Foundation of China/ Germany 2021/01/07 Chemistry. 2021 Mar 8; 27(14):4738-4745. doi: 10.1002/chem.202004848. Epub 2021 Feb 3" |
