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    Improving Oxygen Reduction Performance by Using Protic Poly(Ionic Liquid) as Proton Conductors

    Year: 2019

    Journal: ACS Appl. Mater. Interfaces, Volume 11, FEB 13, page 6111–6117

    Authors: Yan, Xiaocong; Zhang, Fangfang; Zhang, Haining; Tang, Haolin; Pan, Mu; Fang, Pengfei

    Organizations: Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21878239, 21576216]; International Cooperation Project of Hubei Province [2017AHB057]

    Keywords: electrochemistry; fuel cell; platinum; oxygen reduction; poly(ionic liquid)

    Improving catalytic performance of the oxygen reduction reaction (ORR) of Pt/C catalysts is essential for reducing Pt-loading and the according cost of proton exchange membrane fuel cells (PEMFCs). Herein, we report a new conceptual design of catalyst layers to improve the ORR performance of Pt/C catalysts by replacing perfluorosulfonated ionomers with protic poly(ionic liquid) as a proton conductor. The specific activity of the designed catalyst at 0.9 V under acidic conditions is over three times higher than that of catalyst using Nafion as the proton conductor. Furthermore, the durability test reveals that the introduction of protic poly(ionic liquid) ionomers can protect Pt nanoparticles against aggregation during potential cycles, but it is less durable than Nafion because of the nature of hydrocarbons. Nevertheless, we believe that replacing perfluorosulfonated ionomers with protic poly(ionic liquid) as proton conductors could be a promising strategy to design an efficient cathode for low Pt-loading PEMFCs.
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