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- W2078969265 abstract "In this work, the limiting structural effects of porous gas diffusion electrodes on the oxygen reduction reaction were studied in 0.5 M sulfuric acid solutions. Cyclic voltammetry, steady state polarization curves and ac impedance methods were employed in the experimental investigation of electrodes with various polytetrafluoroethylene (PTFE) contents, platinum loadings and platinum-to-carbon composition ratios. The experimental results were analyzed in terms of the current models of gas diffusion electrodes, through which the following conclusions were established: (i) the increase of the PTFE content changes the behavior of the gas diffusion electrodes from an agglomerate diffusion toward a distributed resistance description of the limiting situation; (ii) the change of the platinum loading does not change the rate-determining step of the global electrode process; and (iii) both for electrodes which are too thin (high Pt/C ratio) and too thick (low Pt/C ratio), the polarization behavior is described by a limiting agglomerate diffusion condition." @default.
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- W2078969265 date "1993-10-01" @default.
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- W2078969265 title "Characterization of the limiting structural effects on the electrochemical behavior of porous gas diffusion electrodes" @default.
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- W2078969265 doi "https://doi.org/10.1016/0022-0728(93)80381-q" @default.
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