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题名: Pt/C electrocatalyst for proton exchange membrane fuel cell
作者: Xu, HF;  Lin, ZY;  Qiu, YL;  Tang, Q
关键词: solid polymer electrolyte ;  proton exchange membrane ;  fuel cell ;  electrocatalyst ;  platinum ;  carbon
刊名: CHINESE JOURNAL OF CATALYSIS
发表日期: 2003-02-01
卷: 24, 期:2, 页:143-148
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Proton exchange membrane fuel cell has attracted significant attention recently at both R&D and engineering/industrial level, owing to its special potential to serve as a clean and efficient power source for transportation and portable electric power generation. When oxygen obtained from air for use in the fuel cell, it is necessary to reduce the transport resistance of oxygen in the cathode. The best way to achieve this is to use Pt/C electrocatalyst with a high Pt content to reduce the thickness of cathode catalyst layer while keeping the Pt loading constant. Three Pt/C electrocatalyst samples (w(Pt) = 20%, 40% and 60%) were prepared in aqueous solution by HCHO reduction-precipitation and characterized by BET, XRD, TEM and cyclic voltammogram techniques. The results show that the Pt particles mainly are loaded on the surfaces of carbon particles and in large pores. With the increase of Pt content from 20% to 40% 9 the pore volume and the surface area of the catalyst reduced. When the Pt content increases to 60%, the pore volume and surface of Pt begin to contribute the total pore volume and surface. The Pt particle size is 2similar to4 nm. The higher the Pt/C ratio, the larger the average particle size of Pt. In all the three electrocatalyst samples, Pt crystallites are homogeneously dispersed and adhere to the carbon particles. The performance of the electrocatalyst in proton exchange membrane fuel cell shows that, when the Pt amount is the same on the cathode, the thickness of the catalyst is different with the Pt/C ratios, the higher the ratio, the thinner the layer. Having a thinner catalyst layer is necessary to transport oxygen easily, but too thin catalyst layer makes the electrocatalyst have uneven contact with the membrane. When Pt content is 0.4 mg/cm(2) on the cathode, 40% Pt/C is the best electrocatalyst.
关键词[WOS]: PERFORMANCE ;  ELECTRODES ;  PLATINUM
语种: 英语
WOS记录号: WOS:000181567900016
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139264
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Dalian Inst Railway Technol, Dept Environm Sci & Engn, Dalian 116028, Liaoning, Peoples R China
2.Dalian Sunrise Power Ltd, Dalian 116025, Liaoning, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Liaoning, Peoples R China

Recommended Citation:
Xu, HF,Lin, ZY,Qiu, YL,et al. Pt/C electrocatalyst for proton exchange membrane fuel cell[J]. CHINESE JOURNAL OF CATALYSIS,2003,24(2):143-148.
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