Sub-molten salt-acid treatment of LaCoO3 for a highly active catalyst towards propane combustion

被引：14
作者：
Yao, Junxuan [1 ,2 ]
Lu, Huaiqian [1 ]
Xiao, Yong [1 ]
Hou, Bo [1 ]
Li, Debao [1 ]
Ji, Litao [1 ]
机构：
[1] Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CATALYSIS COMMUNICATIONS | 2019年 / 128卷
关键词：
Propane; Catalytic combustion; LaCoO3; Co3O4; Sub-molten salt; VOLATILE ORGANIC-COMPOUNDS; TOTAL OXIDATION; LOW-TEMPERATURE; CO OXIDATION; PERFORMANCE; CATIONS; OXIDES; ARRAY; BI2O3;
D O I：
10.1016/j.catcom.2019.105718
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
LaCoO3 was treated by a sub-molten salt-acid (S-A) approach to remove La cations from the solid structure. The resulting catalyst possessed disordered spinel Co3O4 structure and higher Co2+/Co3+ ratio on the surface, which induced the formation of oxygen vacancies. The new formed mesoporous material had a significantly increased specific surface area and enhanced accessibility of active sites. As a result, the catalyst was much active towards propane combustion with lower T-90, ca. 238 degrees C compared with the pristine LaCoO3 (T-90 = 370 degrees C) and the hydrothermally synthesized Co3O4 (T-90 = 281 degrees C).
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页数：5
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