화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.19, No.1, 327-336, January, 2013
DOI10.1016/j.jiec.2012.08.021  Export Citation
Enhancement in CO oxidation activity of nanosized CexZr1-xO2 solid solutions by incorporation of additional dopants
Pankaj Bharali1, 2, Pranjal Saikia1, 3, Lakshmi Katta1, and Benjaram M. Reddy1, †
  • 1Inorganic and Physical Chemistry Division, CSIR-Indian Institute of Chemical Technology, Uppal Road, Hyderabad 500 607, India
  • 2Department of Chemical Sciences, Tezpur University, Napaam 784 028, Assam, India
  • 3Department of Chemical Science, Institute of Science and Technology (IST), Gauhati University, Guwahati 781 014, Assam, India
E-mail:
The influence of Hf, Pr and Tb dopant cations on structural and catalytic properties of nanosized CexZr1-xO2 solid solutions has been investigated. A wide range of analytical techniques are utilized to characterize the synthesized materials, and the catalytic activity is evaluated for CO oxidation. XRD, Raman, SEM and TEM results suggested formation of dopant cation incorporated ceria.zirconia solid solutions with highly homogeneous morphology and lattice defects. The CO-TPR measurements revealed an enhanced reducibility of CexZr1-xO2 which is reflected in their better catalytic activity. The role of Tb4+/Tb3+ and Pr4+/Pr3+ redox couples in facilitating a higher activity has been addressed.
Keywords:Ceria-zirconia;Dopant cations;XRD;TEM;Raman spectra;CO-TPR;CO oxidation
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