Effects of Reducing Agent on the Activity of PtRu/Carbon Black Anode Catalyst of Direct Methanol Fuel Cell

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Yu-Wen Chen¹  Han-Gen Chen¹ 

[1] Department of Chemical Engineering, National Central University, Jhongli 32001, Taiwan;

关键词: carbon black;    fuel cell;    PtRu alloy;    anode catalyst;    direct methanol fuel cell;   

DOI  :  10.3390/c7040072

来源: DOAJ

【 摘 要 】

A series of PtRu/carbon black catalysts were prepared by means of deposition-precipitation and reduced by various reducing agents. NaBH₄, HCHO and NaH₂PO₂, respectively, were used as the reduction agents. Some of the samples were reduced by various amounts of NaH₂PO₂ to investigate the effects of P/Pt ratios on the characteristics and activity of the catalyst. These catalysts were characterized by X-ray diffraction and transmission electron microscopy. The components of these catalysts were detected by X-ray fluorescence, X-ray photoelectron microscopy, and extended X-ray absorption of fine structures (EXAFS). The methanol oxidation ability of the catalysts was tested by cyclic voltammetry measurement. The results show that NaH₂PO₂ could effectively reduce the particle size of PtRu metal. It can suppress the growth of metal particles. In addition, the P/Pt ratio is crucial. The catalyst reduced by NaH₂PO₂ with a P/Pt ratio of 1.2 had the highest activity among all catalysts. It had the higher Pt and Ru metal contents and smaller metal particle size than the other catalysts. Its activity was 253.12 A/g, which is higher that than the commercial catalyst (Johnson Matthey H10100, 251.32 A/g).

【 授权许可】

Unknown