화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.5, 3115-3121, September, 2014
DOI10.1016/j.jiec.2013.11.053  Export Citation
Physicochemical and catalytic properties of nanosized Au/CeO2 catalysts for eco-friendly oxidation of benzyl alcohol
Putla Sudarsanam, Baithy Mallesham, D. Naga Durgasri, and Benjaram M. Reddy†
  • Inorganic and Physical Chemistry Division, CSIR – Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 607, India
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In this work, benzyl alcohol oxidation was investigated over Au/CeO2-homogeneous deposition- precipitation (ACH) and Au/CeO2-direct anionic-exchange (ACD) catalysts. Various characterization techniques were employed to study their physicochemical properties. TEM images revealed presence of 5.3 and 7.4 nm Au nanoparticles in ACH and ACD catalysts, respectively. Raman studies showed that only ACH sample exhibits oxygen deficiency (0.0574). Amongst, the ACH catalyst exhibited better catalytic performance owing to smaller gold nanoparticles and abundant oxygen vacancies. The alcohol conversion and product selectivity were strongly dependent on temperature and time-on-stream conditions. The catalytic activity decreased after repeated use due to aggregation of Au nanoparticles.
Keywords:Aerobic oxidation;Nano-gold;Ceria;Preparation method;Oxygen vacancies
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