Tailoring Reconstruction of Co/Cu Mixed Oxide-Derived Tandem Electrocatalysts via <i>In Situ</i> Electrochemical Dissolution-Redeposition for Enhanced Nitrate-to-Ammonia Conversion.

ABSTRACT: Cobalt- and copper-based oxides have emerged as cost-effective electrocatalysts for the electrochemical nitrate reduction reaction (NO₃RR) to ammonia. However, the cathodic potentials required for NO₃RR induce irreversible structural transformations that often compromise catalyst stability and selectivity, depending on the applied electrochemical protocol. To understand the resulting dynamic structure-performance relationships and improve nitrate-to-ammonia conversion, a tandem Co₃O₄/Cu _x O electrocatalyst was prepared by electrodeposition followed by thermal treatment, and two surface activation strategies were employed: by cycles of cyclic voltammetry (CV) or by holding at a constant potential by chronoamperometry (CA). The CA

SUBMITTER: G Winkler ME 

PROVIDER: S-EPMC12933307 | biostudies-literature | 2026 Feb

REPOSITORIES: biostudies-literature