Promoting Ampere‐Level Nitrate Reduction to Ammonia Through Strong Oxide–Oxide Interaction
Abstract
Abstract The electrochemical reduction of nitrate to value‐added ammonia offers a promising approach for removing nitrate pollutants from wastewater, combining energy efficiency, and environmental sustainability. However, developing industrially viable catalysts that combine high efficiency, low‐cost, and high durability remains a significant challenge. Herein, cobalt oxide (Co 3 O 4 ) nanoparticles are anchored onto the copper oxide (CuO) nanosheets support (Co 3 O 4 @CuO) to boost the electroreduction of nitrate to ammonia via a strong oxide–oxide interaction. The optimized Co 3 O 4 @CuO catalyst exhibits a superb nitrate reduction performance, including a high ammonia Faradaic efficiency of 93.4 % at an ampere‐level current density of approximately 2500 mA cm −2 . Mechanistic investigations reveal that the strong oxide–oxide interaction between Co 3 O 4 and CuO regulates the adsorption configuration of nitrite and the subsequent hydrogenation process. This interaction can effectively control the overall reaction pathway, thereby enhancing the yield and selectivity of ammonia. The strategic combination of these oxide materials provides a guiding framework for developing high‐performance catalytic systems.
Article Details
Authors (11)
Haitao Xu
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Porous Materials for Separation and Conversion, College of Chemistry and Materials, Fudan University, 220 Handan, Shanghai 200433, P. R. China
Yang Yang
Ali Han
Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, P. R. China
Canglang Yao
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Porous Materials for Separation and Conversion, Fudan University, 220 Handan, Shanghai 200433, P. R. China
Hao Zhang
Yan Luo
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Porous Materials for Separation and Conversion, Fudan University, 220 Handan, Shanghai 200433, P. R. China
Zhengping Fu
Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China (USTC), 96 Jinzhai, Hefei, Anhui 230026, P. R. China
Yalin Lu
Anhui Laboratory of Advanced Photon Science and Technology, University of Science and Technology of China (USTC), 96 Jinzhai, Hefei, Anhui 230026, P. R. China
Gang Liu
Feng Li
Dongyuan Zhao
Laboratory of Advanced Materials, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, State Key Laboratory of Porous Materials for Separation and Conversion, Fudan University, 220 Handan, Shanghai 200433, P. R. China