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- W2552610852 abstract "Rotating disk electrode (RDE) half-cell experiments were used to determine the impact of a hydroxide-conducting polymerized ionic liquid block copolymer (PILBCP) ionomer on the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR) activity of a commercial Pt/C catalyst at three PILBCP loadings (23, 41, and 57 wt.% total solids). Increasing loadings of PILBCP resulted in reduced surface coverage of both the hydrogen (HUPD) and hydroxide/oxide (OHad/Oad) as evidenced by the cyclic voltammograms due to both a physical blocking of surface catalytic sites and a water/ion diffusional resistance imparted by the presence of the film. With the maximum loading of 57 wt.% PILBCP, a decrease of 88% for the kinetic current density (Jk) and 42% for the diffusion limited current (Id) in the ORR and a decrease of 29% for the Id in the HOR compared to bare Pt/C nanoparticles was observed. Similar trends were observed with 60 wt.% Nafion on Pt/C nanoparticles. These results indicate that while substantial, the detrimental effects of PILBCP ionomers on the half-cell reaction kinetics are no worse than those observed with the Nafion ionomer. AEMFC performance optimization for polymers with sufficient hydroxide conductivities should focus on AEM ionomer integration strategies with the goal of optimizing the triple phase boundary and limiting the interfacial resistance between the AEM and the corresponding ionomer in the catalyst layer." @default.
- W2552610852 created "2016-11-30" @default.
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- W2552610852 date "2016-12-01" @default.
- W2552610852 modified "2023-09-26" @default.
- W2552610852 title "Effect of alkaline exchange polymerized ionic liquid block copolymer ionomers on the kinetics of fuel cell half reactions" @default.
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- W2552610852 doi "https://doi.org/10.1016/j.jelechem.2016.11.024" @default.
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