TY - JOUR
T1 - Soot Oxidation Studies on SrMn0.98B0.02O3 (B - Fe, Ni) Perovskites
AU - Uppara, Hari Prasad
AU - Feroz, Armaan
AU - John, Nithin Samuel
AU - Singh, Sunit Kumar
AU - Labhsetwar, Nitin K.
AU - Dasari, Harshini
N1 - Funding Information:
This work was also supported by the KIST Institutional Program (Project No. 2Z05800)."
Publisher Copyright:
© Published under licence by IOP Publishing Ltd.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2019/10/28
Y1 - 2019/10/28
N2 - In this paper, the performance of SrMn0.98B0.02O3 (B = Fe, Ni) perovskites was evaluated for catalytic soot oxidation applications. All the samples exhibited a nano-crystalline hexagonal structure (XRD analysis) with the crystal sizes ranges 30 to 46 nm. XPS analysis reveals the presence of multiple valence states of Ni cations (Ni2+/Ni3+) and Mn cations (Mn4+/Mn3+) cations with the divalent strontium and trivalent iron cation on the surface of the perovskites. O2-TPD analysis infers that the sample SrMn0.98Ni0.02O3 showed the highest quantity of surface adsorbed oxygen molecules (78.87 μmol.g-1) followed by SrMnO3 sample (72.16 μmol.g-1). Furthermore, the soot-TPR analysis confirms that the sample SrMn0.98Ni0.02O3 shown the higher catalytic activity than SrMn0.98Fe0.02O3due to synergetic effect between Mn - Ni cations, the higher reducibility tendency of the metal ions and the higher quantity of active oxygen species initiated the structural defects in the catalysts. The superior catalytic activity of soot oxidation of the as-synthesized samples was observed in the order of SrMn0.98Ni0.02O3> SrMn0.98Fe0.02O3>SrMnO3>bare soot.
AB - In this paper, the performance of SrMn0.98B0.02O3 (B = Fe, Ni) perovskites was evaluated for catalytic soot oxidation applications. All the samples exhibited a nano-crystalline hexagonal structure (XRD analysis) with the crystal sizes ranges 30 to 46 nm. XPS analysis reveals the presence of multiple valence states of Ni cations (Ni2+/Ni3+) and Mn cations (Mn4+/Mn3+) cations with the divalent strontium and trivalent iron cation on the surface of the perovskites. O2-TPD analysis infers that the sample SrMn0.98Ni0.02O3 showed the highest quantity of surface adsorbed oxygen molecules (78.87 μmol.g-1) followed by SrMnO3 sample (72.16 μmol.g-1). Furthermore, the soot-TPR analysis confirms that the sample SrMn0.98Ni0.02O3 shown the higher catalytic activity than SrMn0.98Fe0.02O3due to synergetic effect between Mn - Ni cations, the higher reducibility tendency of the metal ions and the higher quantity of active oxygen species initiated the structural defects in the catalysts. The superior catalytic activity of soot oxidation of the as-synthesized samples was observed in the order of SrMn0.98Ni0.02O3> SrMn0.98Fe0.02O3>SrMnO3>bare soot.
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U2 - 10.1088/1757-899X/654/1/012008
DO - 10.1088/1757-899X/654/1/012008
M3 - Conference article
AN - SCOPUS:85076995990
SN - 1757-8981
VL - 654
JO - IOP Conference Series: Materials Science and Engineering
JF - IOP Conference Series: Materials Science and Engineering
IS - 1
M1 - 012008
T2 - 2019 3rd International Conference on Materials and Intelligent Manufacturing, ICMIM 2019
Y2 - 19 August 2019 through 22 August 2019
ER -