Electrical and thermoelectric attributes of Ba2Co 2Fe12-2x(Ti-Mn)xO22 and their catalytic activity for complete N2O decomposition

Barkat Ul-Ain, Safeer Ahmed, M. Anis Ur Rehman, Yanqiang Huang, Clive A. Randall

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

A series of Ti-Mn co-doped Ba2Co2Fe 12-2x(Ti-Mn)xO22 (x = 0.2-1.0) Y type hexaferrites has been synthesized by sol-gel method. Single phase hexagonal crystal structure was confirmed by X-ray diffraction analysis and Rietveld refinement with a crystallite size of 30-54 nm of the particles. Ti-Mn doping was uniform in the grains and there was no effect on the microstructure. Alternating current conductivity and dielectric properties were studied over a range of frequencies (20 Hz-3 MHz) for all the compositions. The resistivity increased with the dopant content while the dielectric constant decreased due to valence alteration of Fe3+ ions from the octahedral site by the dopants. Thermoelectric studies along with direct current resistivity results established the electron hopping conduction mechanism in the doped ferrites. The doped hexaferrites were used for the first time as the catalysts for complete N2O decomposition at a low temperature of 873 K. The electronic properties along with surface vacancies were found to be responsible for their efficient catalytic activity. Stability of the prepared material for several hours at the reaction temperature added to its catalytic application.

Original languageEnglish (US)
Pages (from-to)2768-2777
Number of pages10
JournalNew Journal of Chemistry
Volume37
Issue number9
DOIs
StatePublished - Sep 1 2013

Fingerprint

Catalyst activity
Doping (additives)
Decomposition
Rietveld refinement
Ferrites
Crystallite size
Electronic properties
Dielectric properties
X ray diffraction analysis
Sol-gel process
Vacancies
Permittivity
Crystal structure
Ions
Temperature
Microstructure
Catalysts
Electrons
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Materials Chemistry

Cite this

Ul-Ain, Barkat ; Ahmed, Safeer ; Rehman, M. Anis Ur ; Huang, Yanqiang ; Randall, Clive A. / Electrical and thermoelectric attributes of Ba2Co 2Fe12-2x(Ti-Mn)xO22 and their catalytic activity for complete N2O decomposition. In: New Journal of Chemistry. 2013 ; Vol. 37, No. 9. pp. 2768-2777.
@article{30a33d8bbab94411b5c49439eb185672,
title = "Electrical and thermoelectric attributes of Ba2Co 2Fe12-2x(Ti-Mn)xO22 and their catalytic activity for complete N2O decomposition",
abstract = "A series of Ti-Mn co-doped Ba2Co2Fe 12-2x(Ti-Mn)xO22 (x = 0.2-1.0) Y type hexaferrites has been synthesized by sol-gel method. Single phase hexagonal crystal structure was confirmed by X-ray diffraction analysis and Rietveld refinement with a crystallite size of 30-54 nm of the particles. Ti-Mn doping was uniform in the grains and there was no effect on the microstructure. Alternating current conductivity and dielectric properties were studied over a range of frequencies (20 Hz-3 MHz) for all the compositions. The resistivity increased with the dopant content while the dielectric constant decreased due to valence alteration of Fe3+ ions from the octahedral site by the dopants. Thermoelectric studies along with direct current resistivity results established the electron hopping conduction mechanism in the doped ferrites. The doped hexaferrites were used for the first time as the catalysts for complete N2O decomposition at a low temperature of 873 K. The electronic properties along with surface vacancies were found to be responsible for their efficient catalytic activity. Stability of the prepared material for several hours at the reaction temperature added to its catalytic application.",
author = "Barkat Ul-Ain and Safeer Ahmed and Rehman, {M. Anis Ur} and Yanqiang Huang and Randall, {Clive A.}",
year = "2013",
month = "9",
day = "1",
doi = "10.1039/c3nj00309d",
language = "English (US)",
volume = "37",
pages = "2768--2777",
journal = "New Journal of Chemistry",
issn = "1144-0546",
publisher = "Royal Society of Chemistry",
number = "9",

}

Electrical and thermoelectric attributes of Ba2Co 2Fe12-2x(Ti-Mn)xO22 and their catalytic activity for complete N2O decomposition. / Ul-Ain, Barkat; Ahmed, Safeer; Rehman, M. Anis Ur; Huang, Yanqiang; Randall, Clive A.

In: New Journal of Chemistry, Vol. 37, No. 9, 01.09.2013, p. 2768-2777.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electrical and thermoelectric attributes of Ba2Co 2Fe12-2x(Ti-Mn)xO22 and their catalytic activity for complete N2O decomposition

AU - Ul-Ain, Barkat

AU - Ahmed, Safeer

AU - Rehman, M. Anis Ur

AU - Huang, Yanqiang

AU - Randall, Clive A.

PY - 2013/9/1

Y1 - 2013/9/1

N2 - A series of Ti-Mn co-doped Ba2Co2Fe 12-2x(Ti-Mn)xO22 (x = 0.2-1.0) Y type hexaferrites has been synthesized by sol-gel method. Single phase hexagonal crystal structure was confirmed by X-ray diffraction analysis and Rietveld refinement with a crystallite size of 30-54 nm of the particles. Ti-Mn doping was uniform in the grains and there was no effect on the microstructure. Alternating current conductivity and dielectric properties were studied over a range of frequencies (20 Hz-3 MHz) for all the compositions. The resistivity increased with the dopant content while the dielectric constant decreased due to valence alteration of Fe3+ ions from the octahedral site by the dopants. Thermoelectric studies along with direct current resistivity results established the electron hopping conduction mechanism in the doped ferrites. The doped hexaferrites were used for the first time as the catalysts for complete N2O decomposition at a low temperature of 873 K. The electronic properties along with surface vacancies were found to be responsible for their efficient catalytic activity. Stability of the prepared material for several hours at the reaction temperature added to its catalytic application.

AB - A series of Ti-Mn co-doped Ba2Co2Fe 12-2x(Ti-Mn)xO22 (x = 0.2-1.0) Y type hexaferrites has been synthesized by sol-gel method. Single phase hexagonal crystal structure was confirmed by X-ray diffraction analysis and Rietveld refinement with a crystallite size of 30-54 nm of the particles. Ti-Mn doping was uniform in the grains and there was no effect on the microstructure. Alternating current conductivity and dielectric properties were studied over a range of frequencies (20 Hz-3 MHz) for all the compositions. The resistivity increased with the dopant content while the dielectric constant decreased due to valence alteration of Fe3+ ions from the octahedral site by the dopants. Thermoelectric studies along with direct current resistivity results established the electron hopping conduction mechanism in the doped ferrites. The doped hexaferrites were used for the first time as the catalysts for complete N2O decomposition at a low temperature of 873 K. The electronic properties along with surface vacancies were found to be responsible for their efficient catalytic activity. Stability of the prepared material for several hours at the reaction temperature added to its catalytic application.

UR - http://www.scopus.com/inward/record.url?scp=84882380007&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84882380007&partnerID=8YFLogxK

U2 - 10.1039/c3nj00309d

DO - 10.1039/c3nj00309d

M3 - Article

AN - SCOPUS:84882380007

VL - 37

SP - 2768

EP - 2777

JO - New Journal of Chemistry

JF - New Journal of Chemistry

SN - 1144-0546

IS - 9

ER -