Green synthesis of Cu/Co bimetallic oxide catalyst and its application in electrocatalytic nitrate reduction to ammonia.
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75% confidenceA green synthesis method is developed for Cu/Co bimetallic oxide catalysts, which exhibit high efficiency in electrocatalytic nitrate reduction to ammonia, a promising approach for wastewater treatment.
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Abstract
The electroreduction of nitrate to ammonia is considered an environmentally friendly and practically promising approach that can serve as an alternative to microbial nitrification and denitrification, offering a potential solution to nitrate pollution in water bodies while simultaneously producing a vital basic chemical, ammonia (NH 3 ). Low NH 3 yield and selectivity remain major challenges for this reaction, making the development of efficient catalysts crucial. Experimental findings indicate that the construction of Cu x Co y O 4 @TiO 2 /TM markedly boosts the catalytic efficiency TiO 2 , especially by tuning the Cu/Co ratio to optimize catalytic activity, with the best catalytic performance observed at a Cu/Co ratio of 1:1. Furthermore, catalysts with different Cu/Co ratios exhibited consistent changes in morphology and catalytic performance, confirming the role of Cu/Co ratio in regulating catalyst morphology and catalytic activity. Theoretical calculations indicate that Cu and Co bimetallic active sites play a crucial role in charge transfer and structural reconfiguration. The introduction of Cu x Co y O 4 enhances the conductivity of TiO 2 , improves charge transfer efficiency, and the optimization of the Cu/Co ratio significantly improves the overall performance of the nitrate reduction reaction. With the excellent catalytic performance and wide application prospects in wastewater treatment, this catalyst is expected to be a research hotspot in the fields of scientific research and engineering, contributing to future environmental protection and sustainable development.