Surface Structure Reformulation from CuO to Cu/Cu(OH)₂ for Highly Efficient Nitrate Reduction to Ammonia.

ABSTRACT: Electrochemical conversion of nitrate (NO₃ ^-) to ammonia (NH₃) is a potential way to produce green NH₃ and remediate the nitrogen cycle. In this paper, an efficient catalyst of spherical CuO made by stacking small particles with oxygen-rich vacancies is reported. The NH₃ yield and Faraday efficiency are 15.53 mg h^-1 mg_cat ^-1 and 90.69%, respectively, in a neutral electrolyte at a voltage of -0.80 V (vs. reversible hydrogen electrode). The high activity of the electrodes results from changes in the phase and structure during electrochemical reduction. Structurally, there is a shift from a spherical structure with dense accumulation of small particles to a layered network structure with uniform distributi

SUBMITTER: Li J 

PROVIDER: S-EPMC11481209 | biostudies-literature | 2024 Oct

REPOSITORIES: biostudies-literature