6533b820fe1ef96bd1279b1f

RESEARCH PRODUCT

Ni alloy nanowires as high efficiency electrode materials for alkaline electrolysers

Valentino CusumanoPhilippe MandinBernardo PatellaFabrizio GanciCarmelo SunseriGiuseppe AielloRosalinda InguantaEmanuele Cannata

subject

Materials scienceFabricationAlloyNanowireEnergy Engineering and Power Technology02 engineering and technologyengineering.material010402 general chemistryElectrochemistry01 natural sciencesRedoxchemistry.chemical_compoundSettore ING-IND/17 - Impianti Industriali MeccaniciAlkaline electrolyzer Nanostructured electrodes Ni–Co Alloy Template electrosynthesisPotassium hydroxideAqueous solutionRenewable Energy Sustainability and the Environmenttechnology industry and agricultureequipment and supplies021001 nanoscience & nanotechnologyCondensed Matter Physics0104 chemical sciencesSettore ING-IND/23 - Chimica Fisica ApplicataFuel TechnologyChemical engineeringchemistryElectrodeengineering0210 nano-technology

description

Abstract The fabrication and characterization of nickel-alloy electrodes for alkaline electrolysers is reported. Three different alloys (Ni–Co, Ni–Zn and Ni–W) at different composition were studied in order to determine the optimum condition. Nanostructured electrodes were obtained by template electrodeposition into a nanoporous membrane, starting from aqueous solution containing the two elements of the alloy at different concentrations. Composition of alloys can be tuned by electrolyte composition and also depends on the difference of the redox potential of elements and on the presence of complexing agents in deposition bath. Electrochemical and electrocatalytic tests, aimed at establishing the best alloy composition, were carried out for hydrogen evolution reaction. Then, test conducted at a constant current density in potassium hydroxide (30% w/w) aqueous solution were also performed. For all investigated alloys, very encouraging results were obtained and in particular Ni–Co alloys richer in Co showed the best performance.

yearjournalcountryeditionlanguage
2021-10-01International Journal of Hydrogen Energy
https://doi.org/10.1016/j.ijhydene.2020.11.208