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

被引:13
作者
Bhargav, K. K. [1 ]
Ram, S. [1 ]
Majumder, S. B. [1 ]
机构
[1] Indian Inst Technol, Ctr Mat Sci, Kharagpur 721302, W Bengal, India
关键词
METAL-OXIDES; PEROVSKITE;
D O I
10.1007/s10853-014-8623-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
In the present work we have investigated the carbon monoxide (CO) sensing characteristics of cobalt-modified lanthanum iron oxide perovskite sensors. Nanoparticles 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 degrees 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.
引用
收藏
页码:644 / 651
页数:8
相关论文
共 26 条
  • [1] Conduction model of metal oxide gas sensors
    Barsan, N
    Weimar, U
    [J]. JOURNAL OF ELECTROCERAMICS, 2001, 7 (03) : 143 - 167
  • [2] Fierro J.L.G., 1990, Catal Today, V8, P153, DOI DOI 10.1016/0920-5861(90)87016-V
  • [3] Pt surface modification of SnO2 nanorod arrays for CO and H2 sensors
    Huang, Hui
    Ong, C. Y.
    Guo, J.
    White, T.
    Tse, M. S.
    Tan, O. K.
    [J]. NANOSCALE, 2010, 2 (07) : 1203 - 1207
  • [4] Metal oxides for solid-state gas sensors: What determines our choice?
    Korotcenkov, G.
    [J]. MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2007, 139 (01): : 1 - 23
  • [5] Liao L., 2009, NANOTECHNOLOGY, V20
  • [6] Preparation of ZnO nanorods by microemulsion synthesis and their application as a CO gas sensor
    Lim, Sang Kyoo
    Hwang, Sung-Ho
    Kim, Soonhyun
    Park, Hyunwoong
    [J]. SENSORS AND ACTUATORS B-CHEMICAL, 2011, 160 (01) : 94 - 98
  • [7] Studies on electrical properties and CO-sensing characteristics of La0.9□0.1FeO3
    Mu Zonggang
    Zhang Ling
    Li Xifeng
    Hu Jifan
    [J]. JOURNAL OF RARE EARTHS, 2011, 29 (04) : 374 - 377
  • [8] Reducing gas sensing behavior of nano-crystalline magnesium-zinc ferrite powders
    Mukherjee, K.
    Majumder, S. B.
    [J]. TALANTA, 2010, 81 (4-5) : 1826 - 1832
  • [9] Hydrogen sensing characteristics of wet chemical synthesized tailored Mg0.5Zn0.5Fe2O4 nanostructures
    Mukherjee, K.
    Majumder, S. B.
    [J]. NANOTECHNOLOGY, 2010, 21 (25) : 255504
  • [10] Analyses of response and recovery kinetics of zinc ferrite as hydrogen gas sensor
    Mukherjee, K.
    Majumder, S. B.
    [J]. JOURNAL OF APPLIED PHYSICS, 2009, 106 (06)