标題：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

來源出版物：APPLIED SURFACE SCIENCE卷：411頁碼：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

文獻類型：Article

語種：English

作者關鍵詞： Cobalt oxide; Catalytic oxidation; Propane; Carbon monoxide; Volatile organic compounds

擴展關鍵詞： TEMPERATURE CO OXIDATION; MESOPOROUS CO3O4; PROMOTIONAL ROLE; MNOX CATALYST; OXIDE; PERFORMANCE; TOLUENE; COBALT; NANOCATALYSTS; FORMALDEHYDE

通訊作者地址：Li, JJ; You, ZX (reprint author), Wuhan Univ, Sch Resources & Environm Sci, Wuhan 430079, Peoples R China.

電子郵件地址： 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

影響因子：3.15