Hydrogen diffusion in novel porous carbon materials for fuel cells - ToF study
The performance of polymer electrolyte fuel cells (PEMFC) is strongly dependent on the diffusion rate of hydrogen and the electron mobility, which in turn is strongly influenced by the porous carbons, which are used as catalyst supports in PEMFC. We propose to perform ToF measurements to characterize hydrogen diffusion in several samples of nitrogen doped porous carbons (N-PC), which we have synthesized. Compared to commercial activated carbon, our porous carbons generally present higher specific surface area, a higher graphitic character and lower amount or absence of micropores, which we think should enhance hydrogen diffusivity. In addition the nitrogen doping decreases the band gap of our porous carbons. With these measurements, we would like to establish the impact of the nitrogen doping, the pore size/shape and the graphitic character of our samples on the hydrogen diffusivity. We have already prepared a set of different samples, which we have characterized with Raman spectroscopy and TEM measurements.
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FOUQUET Peter; AGNESE Fabio; BAHN Emanuel; CALVO ALMAZAN Irene; HOYOS GIRALDO Leidy and ZBIRI Mohamed. (2013). Hydrogen diffusion in novel porous carbon materials for fuel cells - ToF study. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-05-415
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