Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria

Anjana P. Anantharaman, Hemanth J. Gadiyar, Mythili Surendran, A. Sumadhura Rao, Hari Prasad Dasari, Harshini Dasari, G. Uday Bhaskar Babu

Research output: Contribution to journalArticle

Abstract

Abstract: EDTA–citrate complex and solvothermal methods were adopted for the synthesis of gadolinium-doped ceria (GDC) (Ce0.9Gd0.1O2) solid solution, and the obtained GDC sample is tested for soot oxidation activity. Based on XRD results, it was evident that the reactive facet planes of {100} and {110} were highly intense [intensity ratio (%) of (200)/(100) (34.2%) and (220)/(111) (51.2%)] for GDC prepared by the EDTA–citrate method in comparison with the solvothermal method, and this highly intense reactive facet plane correlates to the lower energy for oxygen vacancy formation. Apart from the smaller crystallite size (10 nm) the GDC sample prepared by the EDTA–citrate method displayed lower band gap energy (2.99 eV), higher ratio of reducibility (45.45%) and lower binding energy (528.8 eV) for surface-adsorbed oxygen. The GDC obtained by EDTA–citrate method displayed a better soot oxidation activity (T50 = 468 °C) than compared to the GDC obtained by solvothermal method (T50 = 500 °C). The obtained results significantly show that the synthesis method plays a crucial role in controlling the structural properties and in enhancing the soot oxidation activity.

Original languageEnglish
Pages (from-to)3179-3188
Number of pages10
JournalChemical Papers
Volume72
Issue number12
DOIs
Publication statusPublished - 01-12-2018
Externally publishedYes

Fingerprint

Soot
Gadolinium
Cerium compounds
Structural properties
Thermodynamic properties
Oxidation
Oxygen
Oxygen vacancies
Crystallite size
Binding energy
Solid solutions
Energy gap

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Biochemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering
  • Materials Chemistry

Cite this

Anantharaman, A. P., Gadiyar, H. J., Surendran, M., Rao, A. S., Dasari, H. P., Dasari, H., & Babu, G. U. B. (2018). Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria. Chemical Papers, 72(12), 3179-3188. https://doi.org/10.1007/s11696-018-0532-5
Anantharaman, Anjana P. ; Gadiyar, Hemanth J. ; Surendran, Mythili ; Rao, A. Sumadhura ; Dasari, Hari Prasad ; Dasari, Harshini ; Babu, G. Uday Bhaskar. / Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria. In: Chemical Papers. 2018 ; Vol. 72, No. 12. pp. 3179-3188.
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Anantharaman, AP, Gadiyar, HJ, Surendran, M, Rao, AS, Dasari, HP, Dasari, H & Babu, GUB 2018, 'Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria', Chemical Papers, vol. 72, no. 12, pp. 3179-3188. https://doi.org/10.1007/s11696-018-0532-5

Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria. / Anantharaman, Anjana P.; Gadiyar, Hemanth J.; Surendran, Mythili; Rao, A. Sumadhura; Dasari, Hari Prasad; Dasari, Harshini; Babu, G. Uday Bhaskar.

In: Chemical Papers, Vol. 72, No. 12, 01.12.2018, p. 3179-3188.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria

AU - Anantharaman, Anjana P.

AU - Gadiyar, Hemanth J.

AU - Surendran, Mythili

AU - Rao, A. Sumadhura

AU - Dasari, Hari Prasad

AU - Dasari, Harshini

AU - Babu, G. Uday Bhaskar

PY - 2018/12/1

Y1 - 2018/12/1

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AB - Abstract: EDTA–citrate complex and solvothermal methods were adopted for the synthesis of gadolinium-doped ceria (GDC) (Ce0.9Gd0.1O2) solid solution, and the obtained GDC sample is tested for soot oxidation activity. Based on XRD results, it was evident that the reactive facet planes of {100} and {110} were highly intense [intensity ratio (%) of (200)/(100) (34.2%) and (220)/(111) (51.2%)] for GDC prepared by the EDTA–citrate method in comparison with the solvothermal method, and this highly intense reactive facet plane correlates to the lower energy for oxygen vacancy formation. Apart from the smaller crystallite size (10 nm) the GDC sample prepared by the EDTA–citrate method displayed lower band gap energy (2.99 eV), higher ratio of reducibility (45.45%) and lower binding energy (528.8 eV) for surface-adsorbed oxygen. The GDC obtained by EDTA–citrate method displayed a better soot oxidation activity (T50 = 468 °C) than compared to the GDC obtained by solvothermal method (T50 = 500 °C). The obtained results significantly show that the synthesis method plays a crucial role in controlling the structural properties and in enhancing the soot oxidation activity.

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Anantharaman AP, Gadiyar HJ, Surendran M, Rao AS, Dasari HP, Dasari H et al. Effect of synthesis method on structural properties and soot oxidation activity of gadolinium-doped ceria. Chemical Papers. 2018 Dec 1;72(12):3179-3188. https://doi.org/10.1007/s11696-018-0532-5