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期刊论文

Performance of Pt/C Doped with Ni for Oxygen Electro-Reduction in Alkaline Media

刘世斌Liu Shibin Cheng Bianping Chi Yongqing Zhang Zhonglin Hao Xiaogang Li Yibing Duan Donghong

Rare Metal Materials and Engineering, 2009, 38 (1): 0001-0006,-0001,():

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摘要/描述

Carbon-supported Pt-Ni catalyst samples were prepared by the colloidal method and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopic (XPS) and transmission electron microscopy (TEM). Potentiodynamic was used to measure the performance of the electro-catalysts for the oxygen electro-reduction. The results indicate that the Pt-Ni alloy particles are distributed homogeneously on the carbon surface, and their particle sizes are 3-5nm. In the same alkali concentration solution, the activity and methanol-tolerance of Pt nano-particle catalysts are greatly enhanced by doping Ni. For the catalyst, the optimum atom ratio of Pt to Ni is Pt50Ni50/C, and its methanol-tolerance is enhanced markedly as compared with Pt/C. The maximal current of the oxygen electro-reduction over Pt50Ni50/C reaches 106 mA/mg, and the onset over potential is 50 mV less than that over Pt/C in 0.1mol/L KOH solution.

【免责声明】以下全部内容由[刘世斌]上传于[2011年06月10日 14时14分18秒],版权归原创者所有。本文仅代表作者本人观点,与本网站无关。本网站对文中陈述、观点判断保持中立,不对所包含内容的准确性、可靠性或完整性提供任何明示或暗示的保证。请读者仅作参考,并请自行承担全部责任。

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