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- W2894494384 abstract "Nitrogen-enriched porous carbons have been discussed as supports for Pt nanoparticle catalysts deployed at cathode layers of polymer electrolyte membrane fuel cells (PEMFC). Here, we present an analysis of the chemical process of carbon surface modification using ammonolysis of preoxidized carbon blacks, and correlate their chemical structure with their catalytic activity and stability using in situ analytical techniques. Upon ammonolysis, the support materials were characterized with respect to their elemental composition, the physical surface area, and the surface zeta potential. The nature of the introduced N-functionalities was assessed by X-ray photoelectron spectroscopy. At lower ammonolysis temperatures, pyrrolic-N were invariably the most abundant surface species while at elevated treatment temperatures pyridinic-N prevailed. The corrosion stability under electrochemical conditions was assessed by in situ high-temperature differential electrochemical mass spectroscopy in a single gas diffusion lay..." @default.
- W2894494384 created "2018-10-05" @default.
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- W2894494384 date "2018-09-24" @default.
- W2894494384 modified "2023-10-16" @default.
- W2894494384 title "Impact of Carbon Support Functionalization on the Electrochemical Stability of Pt Fuel Cell Catalysts" @default.
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- W2894494384 doi "https://doi.org/10.1021/acs.chemmater.8b03612" @default.
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