分析化学2025，Vol.53Issue(10)：1674-1683,中插5-中插36,42.DOI:10.19756/j.issn.0253-3820.251234
氢气注入辅助钯修饰铜钴双金属中空纤维用于增强硝酸盐电催化制氨性能分析
Analysis of Hydrogen Injection-assisted Palladium-Modified Copper-Cobalt Bimetallic Hollow Fibers for Enhanced Electrocatalytic Ammonia Synthesis from Nitrate
摘要
Abstract
The electrocatalytic nitrate reduction reaction(NO3RR)presents a sustainable pathway for large-scale ammonia production,yet it faces significant challenges due to proton supply limitations caused by the high energy barrier for water dissociation,which slows ammonia(NH3)generation.Herein,a palladium(Pd)-modified copper-cobalt(CuCo)hollow fiber penetration electrode that enabled H2 injection through its hollow structures,thereby enhancing proton availability for NO3RR was developed.The active Pd component efficiently dissociated H2,facilitating active hydrogen(*H)spillover and speeding up the cascade NO3RR process on Cu and Co sites.As a result,a half-cell energy efficiency of 39.53%and an NH3 Faradaic efficiency(FE)of 97.11%±1.17%at-0.1 V(vs RHE)were achieved,comparable to state-of-the-art systems.Importantly,the H2-assisted approach prevented the oxidation of active Cu and Co phases,demonstrating exceptional stability with less than 5.6%decay in current density(267 mA/cm2)and retention of NH3 FE at 94.8%after over 70 h of electrolysis.These findings offered valuable insights into proton supply pathways and design of NO3RR electrodes.关键词
中空纤维电极/硝酸根还原/级联催化/氢气解离/电催化合成氨Key words
Hollow fiber electrode/Nitrate reduction reaction/Tandem catalysis/Hydrogen dissociation/Ammonia electrosynthesis引用本文复制引用
陈庆,张乐婷,梁晓龙,刘如鹏,何文辉,逯乐慧..氢气注入辅助钯修饰铜钴双金属中空纤维用于增强硝酸盐电催化制氨性能分析[J].分析化学,2025,53(10):1674-1683,中插5-中插36,42.基金项目
国家自然科学基金项目(Nos.22374141,22134006,U2241287)和长春市国家重点实验室重大专项项目(No.23GZZ02)资助. Supported by the National Natural Science Foundation of China(Nos.22374141,22134006,U2241287)and the Major Special Project of the National Key Laboratory in Changchun(No.23GZZ02). （Nos.22374141,22134006,U2241287）
