Ce-doped copper oxide and copper vanadate Cu3VO4 hybrid for boosting nitrate electroreduction to ammonia

M Zhang and Y Liu and Y Duan and X Liu and YQ Wang, JOURNAL OF COLLOID AND INTERFACE SCIENCE, 671, 258-269 (2024).

DOI: 10.1016/j.jcis.2024.05.189

The electrocatalytic nitrate reduction to ammonia reaction (ENO 3 RR) holds great potential as a cost-effective method for synthesizing ammonia. This work designed a cerium (Ce) doped Cu 2+1 O/Cu 3 VO 4 catalyst. The coupling of vanadium -based oxides with Cu 2+1 O effectively adjusts the catalyst ' s electronic structure, addressing the inherent issues of limited activity and low conductivity in typical copper -based oxides; moreover, Ce doping generates oxygen vacancies (O v ), providing more active sites and thereby enhancing the ENO 3 RR performance. The catalyst exhibits superior NH 3 Faradaic efficiency (93.7 %) with a NH 3 yield of 18.905 mg h -1 cm -2 at -0.5 V vs. RHE under alkaline conditions. This study provides guidance for the design of highly efficient catalysts for ENO 3 RR.

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