Corresponding Author

Ya-wen TANG


The Ir/C catalyst with 30%(by mass) Ir was prepared in the CH3CH2OH and H2O binary system.The X-ray diffraction(XRD) data showed that the average sizes of the Ir particles in the Ir/C catalyst was about 2.2 nm.The results of the electrochemical measurements indicated that the electrocatalytic activity of the Ir/C catalyst for the ammonia oxidation in the neutral NaClO4 solution was similar to the Ir catalyst,while electrocatalytic stability was much better than that of the Ir catalyst.Furthermore,the peak current density of the ammonia oxidation at the Ir/C catalyst electrode showed a good linear relationship with the ammonia concentration,illustrating that the Ir/C catalyst would have a good application prospect in the potential fixed electrolytic type ammonia sensor.


Ir/C catalyst, ammonia oxidation, electrocatalytic stability

Publication Date


Online Available Date


Revised Date


Received Date



[1]Wallgren K,Sotiropoulos S.Oxygen sensors based on anew design concept for amperometric solid state devices[J].Sensors and Actuators B:Chemical,1999,60(2~3):174-183.
[2]CHEN Chang-lun(陈长伦),HE Jian-bo(何建波),LIUWei(刘伟),et al.The research advance of electro-chemical gas sensors[J].Sensor World(in Chinese),2004,4:11-15.
[3]De Vooys A C A,Koper M T M,Van Santen R A,etal.The role of adsorbents in the electrochemical oxida-tion of ammonia on noble and transition metal electrodes[J].J Electroanal Chem,2001,506(2):127-137.
[4]Endo K,Nakamura K,Katayama Y,et al.Pt-Me(Me=Ir,Ru,Ni)binary alloys as an ammonia oxidationanode[J].Electrochimica Acta,2004,49(15):2503-2509.
[5]Endo K,Katayama Y,Miura T.Pt-Ir and Pt-Cu binaryalloys as the electrocatalyst for ammonia oxidation[J].Electrochimica Acta,2004,49(9~10):1635-1638.
[6]Gootzen J F E,Wonders A H,Visscher W,et al.ADEMS and cyclic voltammetry study of NH3oxidation onplatinized platinum[J].Electrochim Acta,1998,43:1851-1861.
[7]L幃pez de Mishima B A,Lescano D,Holgado T M,etal.Electrochemical oxidation of ammonia in alkaline so-lutions:its application to an amperometric sensor[J].Electrochimica Acta,1998,43:395-404.
[8]Vidal-Iglesias F J,Solla-Gull幃n J,Rodr姫guez P,et al.Shape-dependent electrocatalysis:ammonia oxidation onplatinum nanoparticles with preferential(100)surfaces[J].Electrochem Comm,2004,6(10):1080-1084.
[9]Vidal-Iglesias F J,Solla-Gull幃n J,Feliu J M,et al.DEMS study of ammonia oxidation on platinum basalplanes[J].J Electroanal Chem,2006,588:331-338.
[10]XU Jian-Bo(徐建波),HUA Kai-Feng(华凯峰),WANG Yu-Jiang(王玉江),et al.Study of ampero-metric ammonia sensor[J].J Zhengzhou InstituteLight Industry(Natural Science),2004,19:39-42.
[11]Tang Y W,Zhang L L,Wang Y A,et al.Preparationof a carbon supported Pt catalyst using an improved or-ganic sol method and its electrocatalytic activity formethanol oxidation[J].J Power Sources,2006,162:124-131.
[12]Zhang LL,Lu TH,Bao J C,et al.Preparation meth-od of an ultrafine carbon supported Pd catalyst as an a-nodic catalyst in a direct formic acid fuel cell[J].Electrochem.Comm,2006,8:1625-1627.
[13]Zhang L L,Tang Y W,Bao J C,et al.A carbon-sup-ported Pd-P catalyst as the anodic catalyst in a directformic acid fuel cell[J].J Power Sources,2006,162:177-179.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.