电催化剂
法拉第效率
硝酸盐
氨
电解质
材料科学
化学工程
氨生产
产量(工程)
阴极
可逆氢电极
无机化学
氢
合金
亚硝酸盐
催化作用
碳纤维
化学
电化学
电极
冶金
复合材料
工作电极
物理化学
有机化学
复合数
工程类
作者
Song Wu,Jingwen Yan,Donglin Zhao,Wei Wang,Jiali Yu,Ruizhi Li,Quan Li,Guangyin Fan
标识
DOI:10.1016/j.jcis.2024.04.145
摘要
Electricity-driven nitrate (NO3−) to ammonia (NH3) conversion presents a unique opportunity to simultaneously eliminate nitrate from sewage while capturing ammonia. However, the Faradaic efficiency and ammonia yield in this eight-electron process remain unsatisfactory, underscoring the critical need for more effective electrocatalysts. In this study, a RuCo alloy nanosheets electrodeposited on pinewood-derived three-dimensional porous carbon (RuCo@TDC) is introduced as a highly-efficient electrocatalyst for the nitrate reduction reaction. The RuCo@TDC catalyst exhibits superior electrocatalytic performance, achieving the highest NH3 yield of 2.02 ± 0.11 mmol h−1 cm−2 at −0.6 V versus the reversible hydrogen electrode (vs. RHE) and the highest Faradaic efficiency of 95.7 ± 0.8 % at −0.2 V vs. RHE in an electrolyte mixture of 0.1 M KOH and 0.1 M KNO3. Furthermore, the Zn-NO3− battery using RuCo@TDC as the cathode provides a maximum power density of 2.46 mW cm−2 and a satisfactory NH3 yield of 1110 μg h−1 cm−2.
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