TY - JOUR
T1 - Effect of Ag loading on praseodymium doped ceria catalyst for soot oxidation activity
AU - Govardhan, Pandurangappa
AU - Anantharaman, Anjana Payyalore
AU - Patil, Sunaina Shivasharanappa
AU - Dasari, Hari Prasad
AU - Dasari, Harshini
AU - Shourya, Atmuri
N1 - Funding Information:
HPD acknowledges the fund received from “DST-SERB CRG Project (CRG/2020/000425)” and APA Acknowledges the fund received from “RSM, NITW (P1120-Plan-Gen.RSM-Dr. Anjana PA)”. We acknowledge MRC, MNIT Jaipur for facilitating XPS data and Raman Spectroscopy data, SAIF Cochin for TEM data, MARCBIT, Bangalore for BET surface area, and BJH data, NITK for SEM and EDS Analysis, and MAHE-Manipal for the XRD analysis. All the experiments were conducted at NITK.
Publisher Copyright:
© 2021, The Korean Institute of Chemical Engineers.
PY - 2022/2
Y1 - 2022/2
N2 - 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 (O22) 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.
AB - 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 (O22) 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.
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U2 - 10.1007/s11814-021-0933-y
DO - 10.1007/s11814-021-0933-y
M3 - Article
AN - SCOPUS:85122701937
SN - 0256-1115
VL - 39
SP - 328
EP - 342
JO - Korean Journal of Chemical Engineering
JF - Korean Journal of Chemical Engineering
IS - 2
ER -