文献类型：期刊文献

英文题名：Joule-Heating-Driven Encapsulation of FeCo Nanoparticles in Ion-Selective Carbon Shell for Stable Seawater Electrolysis

作者：Kuang, Guanhao[1];Wang, Keyu[1];Wang, Yixing[1,2];Lei, Linfeng[1,2];Zhuang, Linzhou[1];Xu, Zhi[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Suzhou Lab, Suzhou 215000, Peoples R China

年份：2025

卷号：18

期号：11

外文期刊名：CHEMSUSCHEM

收录：;EI(收录号：20251218073581);WOS:【SCI-EXPANDED(收录号:WOS:001446758800001)】；

基金：The authors gratefully acknowledge the research funding provided by National Key R&D Program of China (Grant No. 2021YFB3801301), National Natural Science Foundation of China (Grant Nos. 22378119, 22075076, and 22208092), and Shanghai Pilot Program for Basic Research (22TQ1400100-4).

语种：英文

外文关键词：Joule heating; encapsulation; seawater splitting; ion selectivity; oxygen evolution

摘要：The oxygen evolution reaction (OER) in seawater is notoriously hindered by slow kinetics and high overpotential, compounded by chloride-induced corrosion, which impedes efficient hydrogen production via seawater electrolysis. A key challenge is to devise an OER catalyst that not only mitigates chlorine oxidation and corrosion but is also cost-effective. In this work, the bimetallic iron-cobalt (FeCo) nanoparticles are swiftly encapsulated within N-doped carbon shells in mere seconds using the Joule-heating technique, a process significantly faster than the several hours required by traditional furnace heating. Meanwhile, the high temperature could offer the necessary activation energy for Fe/Co atom redispersion on the carbon shell via forming abundant metal-nitrogen (Co/Fe-N-C) active sites. These Co/Fe-N-C sites exhibit exceptional activity for OER catalysis. Consequently, the sample prepared by Joule-heating at 800 degrees C for 5 seconds (FeCo@CN-J-5) demonstrates superior OER performance, achieving a current density that is 35 times greater than that prepared without N doping and 6 times higher than that prepared via furnace heating. Moreover, FeCo@CN-J-5 operates stably for 100 hours at 200 mA cm-2 with negligible degradation in the highly corrosive electrolyte of 0.1 M KOH + 0.6 M NaCl, demonstrating its promising potential for practical seawater splitting.