Fabrication of Hydrogen Evolution Reaction Electrocatalysts via Pyrolysis of Prussian Blue Based Composites with Polyaniline and Polypyrrole As Matricesстатья
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Аннотация:The paper studies the way of fabricating hydrogen evolution reaction (HER) electrocatalysts viapyrolysis of chemically synthesized composites based on conductive polymers (polyaniline, polypyrrole) withPrussian blue inclusions. Depending on the type of polymer in the initial composite, products of Prussianblue pyrolysis may differ. The use of polyaniline results in ultrafine spherical Fe3N particles, whereas polypyrrolefacilitates the formation of both spherical and cylindrical Fe3С particles. The particles are formedwithin carbon matrices the structure of which is characterized by a significant amount of defects because oftheir doping with nitrogen atoms. The composite containing Fe3C inclusions, which was obtained with theuse of polypyrrole, has a high enough electrocatalytic activity in acidic electrolyte, with its hydrogen evolutioncurrent density being of 10 mA/cm2 at overpotential of ‒230 mV.
