Electrocatalytic reduction of nitrate by in situ generated cobalt nanoparticles

Abstract

The cobalt pyridinophane complex [Co(^HN4)Cl₂]⁺ (^HN4 = 3,7-diaza-1,5(2,6)-dipyridinacyclooctaphane) is converted under catalytic conditions to an electrode-adsorbed species. Aqueous Co²⁺ solutions similarly deposit a species under these conditions. Surface characterization reveals the formation of Co nanoparticles. These nanoparticles are active in the electrocatalytic redution of aqueous nitrate.