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The influences of catalyst combination on the high temperature proton exchange membrane fuel cell

Sasiwimonrit, K ; Chang, W-C

Journal of physics. Conference series, 2019-04, Vol.1198 (3), p.32014 [Periódico revisado por pares]

Bristol: IOP Publishing

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  • Título:
    The influences of catalyst combination on the high temperature proton exchange membrane fuel cell
  • Autor: Sasiwimonrit, K ; Chang, W-C
  • Assuntos: Catalysts ; Chemical energy ; Chemical reactions ; Diffusion layers ; Electric contacts ; Fuel cells ; Gaseous diffusion ; High temperature ; Polytetrafluoroethylene ; Proton exchange membrane fuel cells ; Protons ; Redox reactions ; Thickness
  • É parte de: Journal of physics. Conference series, 2019-04, Vol.1198 (3), p.32014
  • Descrição: High temperature proton exchange membrane fuel cell (HT-PEMFC) is a green device which converts chemical energy to the electricity directly. A redox reaction occurs at the catalyst layers of fuel cell, where electrons separate from hydrogen molecule through the help of catalyst. The structure of catalyst is an important factor that affects the cell performance due to the consequences of chemical reaction area and thickness of the catalyst layer. SEM was used for structure investigating of different platinum and carbon ratios (Pt/C). At 0.7mg/cm2 Pt loading, 3 weight percentages, 10%, 20%, and 40% were compared to see the thickness differences of catalyst layer. The catalyst binder can affect the fuel cell performance as well. PTFE and PVDF were tested, and the results showed the former provided 50% higher current density than the latter at the same voltage output. The uniformity of catalyst layer provided better contact with the gas diffusion layer. It also induced thicker CL which results in more surface area for the chemical reactions. A catalyst combination of 10wt.% Pt/C and PTFE was able to reach 0.58A/cm2 at 0.278V.
  • Editor: Bristol: IOP Publishing
  • Idioma: Inglês
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