Enhanced performance for proton conducting fuel cells at low temperature
- Authors
- Konwar, Dimpul; Basumatary, Padmini; Woo, Sung Pil; Lee, Youna; Yoon, Young Soo
- Issue Date
- 10-Nov-2018
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Anode catalyst; Alloy; Methanol; Single cell; Power density
- Citation
- ELECTROCHIMICA ACTA, v.290, pp.142 - 149
- Journal Title
- ELECTROCHIMICA ACTA
- Volume
- 290
- Start Page
- 142
- End Page
- 149
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/3087
- DOI
- 10.1016/j.electacta.2018.09.064
- ISSN
- 0013-4686
- Abstract
- A platinum-cobalt-iron ternary alloy is deposited on a TiO2-coated multi-walled carbon nanotube support (PtCoFe/MWCNT-TiO2) using a two-step hydrothermal method and evaluated as an anode catalyst for direct methanol fuel cells. Catalysts with different weight ratios of Pt:Co:Fe (3:1:1, 1:1:1 and 1:3:3) on MWCNT-TiO2 are prepared and examined. The Pt3Co1Fe1/MWCNT-TiO2 catalyst shows higher catalytic activity and stability compared to the 1:1:1 and 1:3:3 catalysts for the methanol oxidation reaction in acidic media. Cyclic voltammetry analysis shows a maximum mass activity for Pt3Co1Fe1/MWCNT-TiO2 of 4.17 A mg(Pt)(-1) (vs. Ag/AgCl) with a low onset potential in 0.4 M H2SO4 and 0.3 M CH3OH solution. A single fuel cell based on Pt3Co1Fe1/MWCNT-TiO2 anode catalyst exhibits a maximum power density of 117.94 mW cm(-2) at 50 degrees C in 1.3 M CH3OH, which is significantly higher than that of the Pt1Co1Fe1/MWCNT-TiO2, Pt1Co3Fe3/MWCNT-TiO2, and Pt/MWCNT catalysts. (C) 2018 Elsevier Ltd. All rights reserved.
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