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

机构：[1] School of Materials Science and Technology, Beihang University, Shahe Campus, Beijing, 102206, China; [2] College of Biochemical Engineering, Beijing Union University, 18 Sanqu Fatouxili, Chaoyang District, Beijing, 100023, China; [3] School of Engineering, School of Physical Sciences, Great Bay University, Dongguan, 523000, China

第一机构：School of Materials Science and Technology, Beihang University, Shahe Campus, Beijing, 102206, China

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)

语种：英文

外文关键词：Binary alloys - Catalyst activity - Chemicals removal (water treatment) - Copper - Copper alloys - Copper compounds - Electrolytic reduction - Mass transfer - Membranes - Microfluidics - Nafion membranes - Nanocatalysts - Nanoneedles - Nitrates - Nitrogen removal - Thin walled structures

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 μm). 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. ? 2026 Elsevier B.V.