Sulfate-assisted Ni/Fe-based electrodes for anion exchange membrane saline splitting  

作　　者：Yujun Han Li Shao Yuhang Liu Guodong Li Tongzhou Wang Xuerong Zheng Jihong Li Xiaopeng Han Wenbin Hu Yida Deng 

机构地区：[1]School of Materials Science and Engineering,Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of Education,Tianjin University,Tianjin 300072,China [2]State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China [3]State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China [4]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China

出　　处：《Nano Research》2024年第7期5985-5995,共11页纳米研究（英文版）

基　　金：supported by the Key research and development program of Hainan province(No.ZDYF2022GXJS006);the National Natural Science Foundation of China(Nos.52231008,52201009,52122107,and 52301013);International Science and Technology Cooperation Program of Hainan Province(No.GHYF2023007);the Hainan Provincial Natural Science Foundation of China(No.223RC401);the Education Department of Hainan Province(Nos.Hnky2024ZD-2 and Hnky2023ZD-2);Starting Research Funds of the Hainan University of China(Nos.KYQD(ZR)-21105 and KYQD(ZR)-23090);Collaborative Innovation Center of Marine Science and Technology,Hainan University(Nos.XTCX2022HYC18 and XTCX2022HYC22);the Scientific and Technological Project of Yunnan Precious Metals Laboratory(No.YPML-2023050268).

摘　　要：Saline water electrolysis is an appealing strategy for hydrogen production,attracting more attention in recent years.NiFe-based electrodes exhibit promise as catalysts for saline water electrolysis.Nevertheless,they suffer from the inferior service life of the oxygen evolution reaction(OER).Herein,we report an oxygen-evolution electrode consisting of a sulfate-modulated nickel-iron hydroxide(NiFeOOH)affording as the catalytic active layer and Fe-Ni_(3)S_(2) as the corrosion-proof layer.The developed electrode only requires overpotentials of 220 and 292 mV to deliver the current density of 10 and 500 mA·cm^(−2),respectively.More importantly,it presents long-term stability exceeding 140 and 100 h in 1 M KOH at high current densities of 500 and 1000 mA·cm^(−2),respectively,as well as 120 h for saline water electrolysis at 100 mA·cm^(−2).Experimental results reveal that the generated sulfate plays an indispensable role in improving stability and corrosion resistance.We assembled and tested an anion exchange membrane electrolyzer with Pt/C and NiFeS/NIF as the cathode and anode,respectively,under industrial conditions.This overall water-splitting electrolyzer achieves an impressive energy conversion efficiency of 75%±0.5%.This report offers fresh insights into the design of stable NiFe-based electrodes,which may further promote its practical applications for saline water electrolysis.

关 键 词：saline water electrolysis oxygen evolution reaction anode material water splitting 

分 类 号：O64[理学—物理化学]