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Citation: TANG Yawen, XIE Guofang, KONG Qingmei, CHEN Yu, LU Lude, LU Tianhong. Preparation of Carbon Supported Ir-Co Catalyst and Its Electrocatalytic Performance for Ammonia Oxidation[J]. Chinese Journal of Applied Chemistry, ;2011, 28(8): 931-935. doi: 10.3724/SP.J.1095.2011.00553 shu

Preparation of Carbon Supported Ir-Co Catalyst and Its Electrocatalytic Performance for Ammonia Oxidation

TANG Yawen ^a,b ,
XIE Guofang ^b ,
KONG Qingmei ^b ,
CHEN Yu ^b ,
LU Lude ^a ,
LU Tianhong ^b,,

1.
a Key Laboratory of Ministry of Education for Soft Chemistry and Functional Materials, Nanjing University of Science and Technology, Nanjing;
2.
b College of Chemistry and Material Science, Nanjing Normal University, Nanjing 210046

Corresponding author: LU Tianhong,
Received Date: 21 September 2010
Available Online: 9 February 2011
Fund Project:

The Ir-Co/C catalyst was prepared via a liquid phase reduction method.X-ray diffraction(XRD) and transmission electron microscope(TEM) results indicated that Co atoms enter the crystal lattice of Ir and form the Ir-Co alloy as evidenced by the lattice constriction of Ir and the aggregation of Ir particles could be suppressed.The electrochemical investigation illustrated that comparing with the Ir/C catalyst,the onset potential of the NH₃ oxidation is negatively shifted about 100 mV,the peak current density is increased about 100% and the electrocatalytic stability is also increased at the Ir-Co/C catalyst.In addition,the sensitivity and the detection limit of NH₃ are decreased at the Ir-Co/C catalyst.The results illustrate that the electrocatalytic performance of the Ir-Co/C catalyst for the NH₃ oxidation is obviously better than that of the Ir/C catalyst.Thus,the Ir-Co/C catalyst has a potential application in the electrochemical NH₃ sensor.
- carbon supported Ir-Co catalyst,
- ammonia,
- electrocatalytic performance,
- current-type electrochemical NH₃ sensor
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