Metallic Co Nanoarray Catalyzes Selective NH₃ Production from Electrochemical Nitrate Reduction at Current Densities Exceeding 2 A cm^-2.

ABSTRACT: Electrochemical nitrate reduction (NITRR) offers a promising alternative toward nitrogen recycling and ammonia production under ambient conditions, for which highly active and selective electrocatalyst is desired. In this study, metallic cobalt nanoarrays as facilely prepared from the electrochemical reduction of Co(OH)₂ nanoarrays (NAs) are demonstrated to exhibit unprecedented NH₃ producing capability from catalyzing NITRR. Benefitting from the high intrinsic activity of Co⁰, intimate contact between active species and conductive substrate and the nanostructure which exposes large number of active sites, the Co-NAs electrode exhibits current density of -2.2 A cm^-2 and NH₃ production rate of 10.4 mmol h^-1 cm^-2 at

SUBMITTER: Deng X 

PROVIDER: S-EPMC8025016 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature