화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.39, No.2, 328-342, February, 2022
DOI10.1007/s11814-021-0933-y  Export Citation
Effect of Ag loading on praseodymium doped ceria catalyst for soot oxidation activity
Pandurangappa Govardhan, Anjana Payyalore Anantharaman1, †, Sunaina Shivasharanappa Patil, Hari Prasad Dasari†, Harshini Dasari2, and Atmuri Shourya
  • Energy & Catalysis Materials Laboratory, Chemical Engineering Department, National Institute of Technology Karnataka, Mangalore-575025, India
  • 1Chemical Engineering Department, National Institute of Technology Warangal, Warangal-506004, India
  • 2Chemical Engineering Department, Manipal Institute Technology, Manipal Academy of Higher Education (MAHE), Manipal-576104, India
E-mail:,
Silver-loaded praseodymium doped ceria (XAg/PDC) was synthesized by microwave-assisted co-precipitation and wetness impregnation. XRD confirms the fluorite structure of ceria without secondary phase, and Raman spectroscopy represents the increased generation of oxygen vacancies with Ag loading. The TEM analysis shows lattice fringes corresponding to both CeO2 and Ag on the surface. The BET and BJH analysis of catalyst confirms the high porosity accompanied by high surface area and pore diameter of 5Ag/PDC and 15Ag/PDC, making it more active for the oxidation reaction. From the XPS analysis the amount of surface Ce3+ concentration and the surface chemisorbed oxygen species (O2 2?) is high for 5Ag/PDC and 15Ag/PDC, in line with XRD and Raman results. The soot oxidation T50 temperature follows the trend: 5Ag/PDC~15Ag/PDC>10Ag/PDC>20Ag/PDC>0Ag/PDC. The Ag loading increased the surface reducibility of cerium ions and thus 5 wt% was optimized.
Keywords:Praseodymium-doped Ceria (PDC);Ag Loading;Reducibility Microwave-assisted Co-precipitation;Oxygen Vacancies;Soot Oxidation Activity
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