标题:Dispersion-precipitation synthesis of highly active nanosized Co3O4 for catalytic oxidation of carbon monoxide and propane作者:Zhang, Weidong; Wu, Feng; Li, Jinjun; You, Zhixiong
来源出版物:APPLIED SURFACE SCIENCE卷:411页码:136-143 DOI:10.1016/j.apsusc.2017.03.162 出版年:JUL 31 2017
摘要:Nanosized Co3O4 catalyst was prepared through a dispersion-precipitation method involving a reaction between wet cobalt hydroxide and acetic acid, which forms a colloidal dispersion, and subsequent dilution, which destabilizes and precipitates the colloidal particles. The catalyst had a particle size of 5-15 nm and a specific surface area of 82 m(2)/g. Compared with the analogue prepared by conventional alkali-induced precipitation method, the nanosized catalyst was more reducible and contained a larger amount of active surface oxygen species, as revealed by experiments using temperature-programmed reduction in hydrogen and temperature-programmed desorption of oxygen. The oxygen species could contribute to the observed higher activity in the catalytic oxidation of carbon monoxide and propane. In addition, a kinetics study revealed that the apparent activation energies for carbon monoxide and propane oxidation over the catalyst were 34.0 and 49.5 kJ/mol, respectively, much lower than those over the analogue (54.7 and 71.1 kJ/mol, respectively). Furthermore, a long-term test (76 h) showed that the nanosized catalyst is highly stable.
入藏号:WOS:000401391900016
文献类型:Article
语种:English
作者关键词: Cobalt oxide; Catalytic oxidation; Propane; Carbon monoxide; Volatile organic compounds
扩展关键词: TEMPERATURE CO OXIDATION; MESOPOROUS CO3O4; PROMOTIONAL ROLE; MNOX CATALYST; OXIDE; PERFORMANCE; TOLUENE; COBALT; NANOCATALYSTS; FORMALDEHYDE
通讯作者地址:Li, JJ; You, ZX (reprint author), Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
电子邮件地址: lijinjun@whu.edu.cn; zyou@whu.edu.cn
地址: [Zhang, Weidong; Wu, Feng; Li, Jinjun; You, Zhixiong] Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.
研究方向:Chemistry; Materials Science; Physics
ISSN:0169-4332
eISSN:1873-5584
影响因子:3.15
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