Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method

Anjana P. Anantharaman, Hari Prasad Dasari, Jong Ho Lee, Dasari H, G. Uday Bhaskar Babu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Abstract: In the present study, redox (CeO2, SnO2, Pr6O11 and Mn3O4) and non-redox (Gd2O3, La2O3 ZrO2 and HfO2) metal oxides were successfully synthesised using the EDTA–citrate complexing method and tested for soot oxidation activity. The characterization of the metal oxides is carried out using FTIR, XRD, BET surface area, pore volume analyser, SEM and TEM. The redox nature and metal–oxygen bond information of the metal oxides are obtained from XPS analysis. In redox metal oxides, three critical parameters [lattice oxygen binding energy, reduction temperature and Δr (ionic size difference of the corresponding metal oxide oxidation states)] govern the soot oxidation activity. Among the redox metal oxide samples, Mn3O4 and Pr6O11 samples showed lower binding energy for oxygen (Oβ—529.4, 528.9 eV respectively), lower reduction temperature (Tα—317 and 512 °C respectively) and have smaller Δr value (9 pm and 17 pm respectively). Thus, displayed a better soot oxidation activity (T50 = 484 and 482 °C respectively) than compared to other redox metal oxides. Among the non-redox metal oxides, HfO2 sample displayed higher BET surface area (21.06 m2/g), lattice strain (0.0157), smaller ionic radius (58.2 pm) and higher relative surface oxygen ratio (58%) and thus resulted in a significantly better soot oxidation activity (T50 = 483 °C) than compared to other non-redox metal oxides. Graphical Abstract: [Figure not available: see fulltext.].

Original languageEnglish
Pages (from-to)3004-3016
Number of pages13
JournalCatalysis Letters
Volume147
Issue number12
DOIs
Publication statusPublished - 01-12-2017
Externally publishedYes

Fingerprint

Soot
Oxides
Metals
Oxidation
Oxygen
Binding energy
Oxidation-Reduction
Lattice constants
Thermodynamic properties
X ray photoelectron spectroscopy
Transmission electron microscopy
Temperature
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Anantharaman, A. P., Dasari, H. P., Lee, J. H., H, D., & Babu, G. U. B. (2017). Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method. Catalysis Letters, 147(12), 3004-3016. https://doi.org/10.1007/s10562-017-2181-7
Anantharaman, Anjana P. ; Dasari, Hari Prasad ; Lee, Jong Ho ; H, Dasari ; Babu, G. Uday Bhaskar. / Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method. In: Catalysis Letters. 2017 ; Vol. 147, No. 12. pp. 3004-3016.
@article{152e615b08824187b550904e947e29cf,
title = "Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method",
abstract = "Abstract: In the present study, redox (CeO2, SnO2, Pr6O11 and Mn3O4) and non-redox (Gd2O3, La2O3 ZrO2 and HfO2) metal oxides were successfully synthesised using the EDTA–citrate complexing method and tested for soot oxidation activity. The characterization of the metal oxides is carried out using FTIR, XRD, BET surface area, pore volume analyser, SEM and TEM. The redox nature and metal–oxygen bond information of the metal oxides are obtained from XPS analysis. In redox metal oxides, three critical parameters [lattice oxygen binding energy, reduction temperature and Δr (ionic size difference of the corresponding metal oxide oxidation states)] govern the soot oxidation activity. Among the redox metal oxide samples, Mn3O4 and Pr6O11 samples showed lower binding energy for oxygen (Oβ—529.4, 528.9 eV respectively), lower reduction temperature (Tα—317 and 512 °C respectively) and have smaller Δr value (9 pm and 17 pm respectively). Thus, displayed a better soot oxidation activity (T50 = 484 and 482 °C respectively) than compared to other redox metal oxides. Among the non-redox metal oxides, HfO2 sample displayed higher BET surface area (21.06 m2/g), lattice strain (0.0157), smaller ionic radius (58.2 pm) and higher relative surface oxygen ratio (58{\%}) and thus resulted in a significantly better soot oxidation activity (T50 = 483 °C) than compared to other non-redox metal oxides. Graphical Abstract: [Figure not available: see fulltext.].",
author = "Anantharaman, {Anjana P.} and Dasari, {Hari Prasad} and Lee, {Jong Ho} and Dasari H and Babu, {G. Uday Bhaskar}",
year = "2017",
month = "12",
day = "1",
doi = "10.1007/s10562-017-2181-7",
language = "English",
volume = "147",
pages = "3004--3016",
journal = "Catalysis Letters",
issn = "1011-372X",
publisher = "Springer Netherlands",
number = "12",

}

Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method. / Anantharaman, Anjana P.; Dasari, Hari Prasad; Lee, Jong Ho; H, Dasari; Babu, G. Uday Bhaskar.

In: Catalysis Letters, Vol. 147, No. 12, 01.12.2017, p. 3004-3016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Soot Oxidation Activity of Redox and Non-Redox Metal Oxides Synthesised by EDTA–Citrate Method

AU - Anantharaman, Anjana P.

AU - Dasari, Hari Prasad

AU - Lee, Jong Ho

AU - H, Dasari

AU - Babu, G. Uday Bhaskar

PY - 2017/12/1

Y1 - 2017/12/1

N2 - Abstract: In the present study, redox (CeO2, SnO2, Pr6O11 and Mn3O4) and non-redox (Gd2O3, La2O3 ZrO2 and HfO2) metal oxides were successfully synthesised using the EDTA–citrate complexing method and tested for soot oxidation activity. The characterization of the metal oxides is carried out using FTIR, XRD, BET surface area, pore volume analyser, SEM and TEM. The redox nature and metal–oxygen bond information of the metal oxides are obtained from XPS analysis. In redox metal oxides, three critical parameters [lattice oxygen binding energy, reduction temperature and Δr (ionic size difference of the corresponding metal oxide oxidation states)] govern the soot oxidation activity. Among the redox metal oxide samples, Mn3O4 and Pr6O11 samples showed lower binding energy for oxygen (Oβ—529.4, 528.9 eV respectively), lower reduction temperature (Tα—317 and 512 °C respectively) and have smaller Δr value (9 pm and 17 pm respectively). Thus, displayed a better soot oxidation activity (T50 = 484 and 482 °C respectively) than compared to other redox metal oxides. Among the non-redox metal oxides, HfO2 sample displayed higher BET surface area (21.06 m2/g), lattice strain (0.0157), smaller ionic radius (58.2 pm) and higher relative surface oxygen ratio (58%) and thus resulted in a significantly better soot oxidation activity (T50 = 483 °C) than compared to other non-redox metal oxides. Graphical Abstract: [Figure not available: see fulltext.].

AB - Abstract: In the present study, redox (CeO2, SnO2, Pr6O11 and Mn3O4) and non-redox (Gd2O3, La2O3 ZrO2 and HfO2) metal oxides were successfully synthesised using the EDTA–citrate complexing method and tested for soot oxidation activity. The characterization of the metal oxides is carried out using FTIR, XRD, BET surface area, pore volume analyser, SEM and TEM. The redox nature and metal–oxygen bond information of the metal oxides are obtained from XPS analysis. In redox metal oxides, three critical parameters [lattice oxygen binding energy, reduction temperature and Δr (ionic size difference of the corresponding metal oxide oxidation states)] govern the soot oxidation activity. Among the redox metal oxide samples, Mn3O4 and Pr6O11 samples showed lower binding energy for oxygen (Oβ—529.4, 528.9 eV respectively), lower reduction temperature (Tα—317 and 512 °C respectively) and have smaller Δr value (9 pm and 17 pm respectively). Thus, displayed a better soot oxidation activity (T50 = 484 and 482 °C respectively) than compared to other redox metal oxides. Among the non-redox metal oxides, HfO2 sample displayed higher BET surface area (21.06 m2/g), lattice strain (0.0157), smaller ionic radius (58.2 pm) and higher relative surface oxygen ratio (58%) and thus resulted in a significantly better soot oxidation activity (T50 = 483 °C) than compared to other non-redox metal oxides. Graphical Abstract: [Figure not available: see fulltext.].

UR - http://www.scopus.com/inward/record.url?scp=85028978768&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85028978768&partnerID=8YFLogxK

U2 - 10.1007/s10562-017-2181-7

DO - 10.1007/s10562-017-2181-7

M3 - Article

VL - 147

SP - 3004

EP - 3016

JO - Catalysis Letters

JF - Catalysis Letters

SN - 1011-372X

IS - 12

ER -