Journal of Materials Science

, Volume 50, Issue 2, pp 644–651 | Cite as

The role of catalytic cobalt-modified lanthanum ferrite nano-crystals in selective sensing of carbon monoxide

  • K. K. Bhargav
  • S. Ram
  • S. B. Majumder
Original Paper


In the present work we have investigated the carbon monoxide (CO) sensing characteristics of cobalt-modified lanthanum iron oxide perovskite sensors. Nano-particles of lanthanum ferrite and cobalt-modified lanthanum ferrites have been synthesized by auto-combustion route. We have reported that Co-modified LaFeO3 sensor is capable to sense low-concentration (<100 ppm) CO selectively at operating temperature as low as 100 °C. The selective CO sensing characteristics at lower operating temperature are correlated to the superior catalytic activities of these perovskite toward CO oxidation. For these perovskite sensors it was demonstrated that the lower metal–oxygen binding energy, favorable d orbital electron configuration of transition metal cation/(s), and the nature of surface composition are the three dominant factors that control the catalytic activity and thereby the CO sensing characteristics.


Perovskite C4H10 Sensor Surface LaFeO3 LaCoO3 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The above research work is partially supported by a research grant from IBSA-DST, Government of India.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Materials Science CentreIndian Institute of Technology KharagpurKharagpurIndia

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