Cascade Electrocatalytic Reduction of Nitrate to Ammonia Using Bimetallic Covalent Organic Frameworks with Tandem Active Sites.

ABSTRACT: Electrochemical nitrate reduction reaction (NO₃RR) is a promising approach to simultaneously realize pollutant removal and ammonia generation. However, this process involves the transfer of eight electrons and nine protons along with multiple by-products, resulting in a significant challenge for achieving high ammonia yield and selectivity. Herein, we introduced bimetallic covalent organic frameworks catalysts with Cu and Co active sites to achieve a two-step tandem reaction, avoiding excessive nitrite accumulation and enabling efficient NO₃RR. For the initial two-electron process, the Cu sites in the bimetallic catalyst exhibit a strong binding affinity with nitrate, promoting their conversion to nitrite. The Co sites enhance the supply and adsorption of active hydro

SUBMITTER: Zhong J 

PROVIDER: S-EPMC12322651 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature