Synthesis of a highly active carbon-supported Ir–V/C catalyst for the hydrogen oxidation reaction in PEMFC
Synthesis of a highly active carbon-supported Ir–V/C catalyst for the hydrogen oxidation reaction in PEMFC
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DOI：
10.1016/j.electacta.2009.04.065
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发表时间：
2009-10
影响因子：
6.6
通讯作者：
Bing Li;Jinli Qiao;Daijun Yang;Junsheng Zheng;J. Ma;Jiujun Zhang;Haijiang Wang
中科院分区：
文献类型：
--
作者：
Bing Li;Jinli Qiao;Daijun Yang;Junsheng Zheng;J. Ma;Jiujun Zhang;Haijiang Wang
The active, carbon-supported Ir and Ir–V nanoclusters with well-controlled particle size, dispersity, and composition uniformity, have been synthesized via an ethylene glycol method using IrCl3and NH4VO3as the Ir and V precursors. The nanostructured catalysts were characterized by X-ray diffraction and high-resolution transmission electron microscopy. The catalytic activities of these carbon-supported nanoclusters were screened by applying on-line cyclic voltammetry and electrochemical impedance spectroscopy techniques, which were used to characterize the electrochemical properties of fuel cells using several anode Ir/C and Ir–V/C catalysts. It was found that Ir/C and Ir–V/C catalysts affect the performance of electrocatalysts significantly based on the discharge characteristics of the fuel cell. The catalyst Ir–V/C at 40wt.% displayed the highest catalytic activity to hydrogen oxidation reaction and, therefore, high cell performance is achieved which results in a maximum power density of 563mWcm−2at 0.512V and 70°C in a real H2/air fuel cell. This performance is 20% higher as compared to the commercial available Pt/C catalyst. Fuel cell life test at a constant current density of 1000mAcm−2in a H2/O2condition shows good stability of anode Ir–V/C after 100h of continuous operation.
