Towards the design of efficient metal free ORR catalysts based on Zeolite Templated Carbons
Résumé
Carbon and carbon/nitrogen Zeolite Templated Carbons (C-ZTC and CN-ZTC) were synthesized from pure ethylene and acetonitrile precursors and thoroughly characterized by nitrogen physisorption at 77 K, SEM, XRD, TGA, Raman spectroscopy and XPS. The CN-ZTC presented high nitrogen content (C/N = 12.5) and a less condensed skeleton compared to C-ZTC. Reduced micropore volume of CN-ZTC was observed due to the formation of extra-ZTC graphene-like species on the external surface, leading to high electron conductivity. The preparation of CN-ZTC based catalysts allowed for achieving conspicuously high ORR activity, featuring a half-wave potential of 0.81 V vs. RHE and high hydroxyl selectivity.
Domaines
Catalyse
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