Hollow Square Ni-Doped Copper Oxide Catalyst Boosting Electrocatalytic Nitrate Reduction

The electrochemical nitrate reduction reaction to ammonia (NRA) is gaining increasing attention as an eco-friendly approach to convert harmful nitrate pollutants into high-value product ammonia. NRA involves two critical rate-determining steps: hydrogenation of the *NO and *NOH intermediates. The composite of Ni and Cu has been demonstrated to exhibit synergistic catalytic effects; however, research on the combination of Ni and CuO remains limited. Herein, an advanced Ni-doped copper oxide catalyst with a hollow square morphology (Ni–CuO) is reported with a Faradaic efficiency of 95.26% at −0.8 V vs RHE and a high yield rate of 0.94 mmol h–1 cm–2, demonstrating high selectivity and stability. Complementary…

• SA
  Science and Technology Foundation of Shenzhen City

  Award: JCYJ20220531102207017
• NN
  National Natural Science Foundation of China

  Awards: 52073177, 52372090
• BA
  Basic and Applied Basic Research Foundation of Guangdong Province

  Award: 2023A1515010947