화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.2, 444-453, March, 2014
DOI10.1016/j.jiec.2013.05.001  Export Citation
Structure dependent catalytic activity of Ce0.8Tb0.2O2-δ and TiO2 supported Ce0.8Tb0.2O2-δ solid solutions for CO oxidation
Damma Devaiah1, Deshetti Jampaiah1, Pranjal Saikia1, 2, and Benjaram M. Reddy1, †
  • 1Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 607, India
  • 2Department of Chemical Science, Gauhati University, Guwahati 781 014, India
E-mail:
A facile coprecipitation and deposition precipitation method were used for synthesis of nanosized Ce0.8Tb0.2O2-δ (CT) and Ce0.8Tb0.2O2-δ/TiO2 (CTT) solid solutions, respectively. The synthesized materials were characterized by various state-of-the-art techniques and evaluated for CO oxidation activity. Formation of CT solid solution was confirmed by XRD and Raman, and nanocrystalline nature by TEM. Characterization results further suggested formation of a new pyrochlore phase between TiO2 and TbO2 at 1073 K, and the presence of Ce3+ associated with lattice defects in all samples. Catalytic results showed that CT calcined at 773 K exhibits a high activity and correlates well with physicochemical characteristics.
Keywords:Ceria-terbia;Solid solution;Characterization;CO oxidation;Lattice defects;Structure-activity relationship
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