石墨烯應用在直接甲醇燃料電池觸媒擔體之研究
—碳材混摻及親水修飾

唐可縈

doi:10.6844/NCKU.2012.01348

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石墨烯應用在直接甲醇燃料電池觸媒擔體之研究 —碳材混摻及親水修飾

A Study on the Application of Graphene as Catalyst Support in Direct Methanol Fuel Cell—Blending with Other Carbon Materials and Hydrophilic Modification

唐可縈 , Masters　　Advisor：楊明長　　

繁體中文 DOI： 10.6844/NCKU.2012.01348

直接甲醇燃料電池；觸媒擔體；石墨烯；親水修飾；碳材混摻； direct methanol fuel cell ； catalyst support ； graphene ； hydrophilic modification ； blended with other carbon materials

Abstract │ Reference (111) │ Times Cited (1) │ Altmetrics

Abstract 〈TOP〉

Parallel Abstract 〈TOP〉

The catalyst support used in the anode of Direct Methanol Fuel Cell (DMFC) was needed to have a large surface area, high conductivity and some hydrophile. This research were focused on the effects of graphene as catalyst support for the anode of DMFC. The investigated graphenes included of pure graphene and graphene, modified by hydrophilic materials or blended with other carbon materials. And the activity of these catalysts, with PtRu supported on graphene, were compared with that of commercial catalysts in DMFC system. The comparison were performed in half cell system and in three-electrodes single cell system. And the resultsin these two system were also compared to the other.
The hydrophile and the functional groups on catalyst were analyzed by contact angle goniometer and Fourier transfer infrared spectroscopy (FTIR), respectively. The dispersion and particle size of PtRu were analyzed by Transmission Electron Microsope (TEM) and X-ray diffratometer (XRD). The atomic ratio of Pt and Ru were analyzed by Energy Dispersive Spectrometer (EDS). From FTIR, the catalyst (PtRu/G) that graphene oxide (GO) and metal precusors were reduced together by sodium borohydride had hydrophilic functional groups,C-O and O-H, and was suitable in DMFC. According to the observation on PtRu/G by TEM, hydrophilic GO reduced with matal precusors in aqueous solution could improve the dispersion of PtRu, with a particle size of 2.30 nm. PtRu/G(N) was the catalyst that graphene was reduced by hydrazine, and then PtRu were reduced on this support. The dispersion of PtRu in PtRu/G(N) was worse than that in PtRu/G catalyst, but the particle size of PtRu was remained the same. The performance of catalysts with graphenes modified by hydrophilic materials and blended with other carbon materials were worse than that of PtRu/G.
    Electrochemical surface area of PtRu/G was 1.42 times of that of any commercial catalyst, Johnson Matthey and E-TEK, and 2.17 times of that of PtRu/G(N). The mass activity at peak potential of PtRu/G was 1.42 times of that of Johnson Matthey, 1.54 times of that of E-TEK, and 3.03 times of that of PtRu/G(N). The If/Ib ratio of PtRu/G was 2.19 which was 1.24 times of Johnson Matthey. In methanol aqueous solution, PtRu/G perduced smaller ratio of side product after mathanol oxidation reaction. 
    In the single cell test, the maximun power density with PtRu/G was 0.74 times of that with Johnson Matthey, similar to that with E-TEK, and 1.37 times of that with PtRu/G(N).

Reference ( 111 ) 〈TOP〉

[4] J. Giner, "Model of a hydrogen-air fuel cell with alkaline electrolyte," Journal of the Electrochemical Society, vol. 116, p. 124, 1969.
連結：
[8] T. J. Schmidt, M. Noeske, H. A. Gasteiger, R. J. Behm, P. Britz, and H. Bonnemann, "PtRu alloy colloids as precursors for fuel cell catalysts - A combined XPS, AFM, HRTEM, and RDE study," Journal of the Electrochemical Society, vol. 145, pp. 925-931, 1998.
連結：
[9] D. R. Rolison, P. L. Hagans, K. E. Swider, and J. W. Long, "Role of hydrous ruthenium oxide in Pt−Ru direct methanol fuel cell anode electrocatalysts: the importance of mixed electron/proton conductivity," Langmuir, vol. 15, pp. 774-779, 1999.
連結：
[10] T. Iwasita, H. Hoster, A. John-Anacker, W. F. Lin, and W. Vielstich, "Methanol oxidation on PtRu electrodes. Influence of surface structure and Pt−Ru atom distribution," Langmuir, vol. 16, pp. 522-529, 1999.
連結：
[11] S. Ball, A. Hodgkinson, G. Hoogers, S. Maniguet, D. Thompsett, and B. Wong, "The proton exchange membrane fuel cell performance of a carbon supported PtMo catalyst operating on reformate," Electrochemical and Solid-State Letters, vol. 5, pp. A31-A34, 2002.
連結：

Times Cited (1) 〈TOP〉

施昱廷(2014)。以拆鏈毛球碳材為質子交換膜燃料電池陰極觸媒載體之研究。成功大學化學工程學系學位論文。2014。1-166。

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