文献类型：期刊文献

英文题名：Electrochemical nitrate reduction in a Pd-Cu nanoneedle array-loaded Cu hollow fiber membrane microfluidic reactor

作者：Ma, Jing[1];Jing, Chaojie[1];Xu, Mingyuan[1];Leng, Wuwei[1];Wei, Wei[2];Qin, Guotong[1];Liu, Shaomin[3];Jiang, Lei[1]

第一作者：Ma, Jing

通讯作者：Qin, GT[1];Wei, W[2]

机构：[1]Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China;[2]Beijing Union Univ, Coll Biochem Engn, 18 Sanqu Fatouxili, Beijing 100023, Peoples R China;[3]Great Bay Univ, Sch Engn, Sch Phys Sci, Dongguan 523000, Peoples R China

第一机构：Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China

通讯机构：[1]corresponding author), Beihang Univ, Sch Mat Sci & Technol, Shahe Campus, Beijing 102206, Peoples R China;[2]corresponding author), Beijing Union Univ, Coll Biochem Engn, 18 Sanqu Fatouxili, Beijing 100023, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;

年份：2026

卷号：546

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20263121237361);Scopus(收录号：2-s2.0-105046328910);WOS:【SCI-EXPANDED(收录号:WOS:001842836200001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 52370062, 5200006, 52070009) , the Fundamental Research Funds for the Central Universities (Grant No. 501QYJC2025101001) and the China Postdoctoral Science Foundation (Grant No. 2020TQ0026) .

语种：英文

外文关键词：Electrochemical reduction of nitrate; Membrane-based microfluidic reactor; Copper hollow fiber membrane; Pd-Cu nanoneedle arrays

摘要：Electrochemical nitrate reduction serves as a highly promising water decontamination strategy. However, its core challenge lies in achieving both high N2 selectivity and a short hydraulic retention time (HRT). Herein, we constructed a membrane-based microfluidic reactor by loading bimetallic Pd-Cu nanoneedle catalysts onto a copper hollow fiber membrane (HFM) (pore size 6 mu m). This reactor achieves 93.46% nitrate single pass removal and 79.63% N2 selectivity at a short HRT of 2.17 min. The facile preparation of these catalysts requires only depositing spherical Cu particles onto the HFM, followed by potentiostatic deposition. This superior performance stems from the enhanced mass transfer of the microfluidic reactor and high catalytic activity. Specifically, the thin-walled HFM and pressure driven flow minimize mass transfer resistance. Simultaneously, pore channels act as confined microenvironments, increasing the collision opportunity between reactants and catalytic sites, thereby boosting single pass NO3 removal. Furthermore, the nanoneedles promote N2 generation due to their distinct tip effect and hydrophobicity. This work demonstrates that metal-based HFM microfluidic reactor can simultaneously overcome mass transfer and activity challenges, paving the way for scalable water treatment technologies.