Mg2CuxFe1O3.5+x Mixed Metal Oxides as Ammonia Sensitive Material of Ammonia Sensors

Xiang Dong Li; Ying Chen; Li Hong Zhou; Feng Xia; Jian Zhong Xiao

doi:10.4028/www.scientific.net/KEM.602-603.851

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 602-603Mg2CuxFe1O3.5+x Mixed Metal Oxides as Ammonia...

Mg₂Cu_xFe₁O_3.5+xMixed Metal Oxides as Ammonia Sensitive Material of Ammonia Sensors

Abstract:

Mg₂Cu_xFe₁O_3.5+xmixed metal oxides were found to be active catalysts for the selective oxidation of ammonia. In this paper, Mg₂Cu_xFe₁O_3.5+xmixed metal oxides were prepared by co-precipitation method and calcined at 600°C for 12 h in an air atmosphere, then ammonia sensors have been made by screen-printed Mg₂Cu_xFe₁O_3.5+xelectrode on the electrolyte (8moleYSZ) surface and sintered at 1126°C for 1h in an air atmosphere. The samples were characterized by XRD and ESEM. The performance of ammonia sensors were tested in different concentration of ammonia. It can be found that Mg₂Cu_0.25Fe₁O_3.75electrode showed a higher response value and good sensitivity to ammonia at 350°C, the value of sensitivity is 226.6mV/decsde. The influences of Cu content on the ammonia response performance of Mg₂Cu_xFe₁O_3.5+x mixed metal oxides electrodes are discussed.

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Key Engineering Materials (Volumes 602-603)

Pages:

851-857

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.602-603.851

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Online since:

March 2014

Authors:

Xiang Dong Li, Ying Chen, Li Hong Zhou, Feng Xia, Jian Zhong Xiao*

Keywords:

Ammonia-Sensitive Electrode, Co-Precipitation, Mg₂Cu_xFe₁O_3.5+x, Selective Catalytic

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