耐蚀镍基催化剂的制备及电解海水性能的研究  

Preparation of corrosion resistant nickel-based materials and study onthe performance for seawater electrolysis

作　　者：关亚峰 朱胜利[1] 李朝阳[1] 姜辉[1] 徐文策[1] 梁砚琴[1] GUAN Yafeng;ZHU Shengli;LI Zhaoyang;JIANG Hui;XU Wence;LIANG Yanqin(School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China)

机构地区：[1]天津大学材料科学与工程学院,天津300350

出　　处：《功能材料》2023年第9期9001-9006,9021,共7页Journal of Functional Materials

基　　金：国家自然科学基金项目(52103218)。

摘　　要：开发抑制析氯的竞争反应和氯离子腐蚀的高效电解海水催化剂是至关重要的。通过两步法(激光扫描法+浸泡置换法)在泡沫镍上快速制备了一种高活性且耐蚀的NiFe-LDH@MnO_(2)/NF电解海水催化剂。该催化剂中NiFe-LDH提高了催化反应的活性,MnO_(2)层防止催化剂被氯侵蚀,二者的协同作用使催化剂在碱性盐水介质中表现出优异的析氧性能。所制备的NiFe-LDH@MnO_(2)/NF催化剂在10 mA/cm^(2)的电流密度下,过电位仅为270 mV,在100 mA/cm^(2)的大电流密度下过电位为360 mV,且在10 mA/cm^(2)的电流密度下可稳定催化析氧100 h,为工业电解海水制氢催化剂的制备提供理论指导。Developing high-efficiency catalysts to inhibit the competitive reaction of chlorine evolution and corrosion is essential for electrolytic seawater.In this paper,a high performance and corrosion resistant NiFe-LDH@MnO_(2)/NF catalyst for seawater electrolysis was prepared rapidly on a nickel foam by two steps(laser scanning method and immersion replacement method).The NiFe-LDH of catalyst improves the activity of catalytic reaction,and the MnO_(2)layer prevents the catalyst from being eroded by chlorine.The synergism effect of two aspects makes the catalyst exhibit excellent oxygen evolution performance in alkaline brine medium.The overpotential of the NiFe-LDH@MnO_(2)/NF catalyst is only 270 mV at the current density of 10 mA/cm^(2),and 360 mV at the high current density of 100 mA/cm^(2),along with stable oxygen evolution reaction for 100 h at the current density of 10 mA/cm^(2).This provides theoretical guidance for the preparation of industrial electrolytic seawater catalyst to produce hydrogen.

关 键 词：MnO_(2) 析氧反应 NiFe-LDH 电解海水 激光扫描 

分 类 号：TQ151.1[化学工程—电化学工业] TB34[一般工业技术—材料科学与工程]