Song Jiayun, Li Zixiao, Sun Shengjun, Yang Chaoxin, Cai Zhengwei, Wang Xiaoyan, Yue Meng, Zhang Min, Wang Hefeng, Farouk Asmaa, Hamdy Mohamed S, Sun Xuping, Tang Bo
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan 250014, Shandong, China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China.
J Colloid Interface Sci. 2025 Feb;679(Pt B):1-8. doi: 10.1016/j.jcis.2024.10.086. Epub 2024 Oct 16.
Seawater electrolysis taking advantage of coastal/offshore areas is acknowledged as a potential way of large-scale producing H to substitute traditional technology. However, anodic catalysts with high overpotentials and limited lifespans (caused by chloride-induced competitive chemical reactions) hinder the system of seawater electrolysis for H production. Herein, we present a citrate anion (CA) modified NiFe layered double hydroxide nanosheet array on nickel foam (NiFe LDH@NiFe-CA/NF), which serves as an efficient and stable electrocatalyst towards long-term alkaline seawater oxidation. It requires only a low overpotential of 387 mV to achieve a current density of 1000 mA cm, outperforming NiFe LDH/NF (414 mV). Moreover, NiFe LDH@NiFe-CA/NF exhibits continuous oxygen evolution testing for 300 h at 1000 mA cm due to its anti-corrosion characterization. Additionally, the fabricated cell can stably operate at 300 mA cm (60 °C, 6 M KOH + seawater) and only require 1.69 V, achieving low energy consumption of seawater splitting.
利用沿海/近海地区的海水电解被认为是大规模生产氢气以替代传统技术的一种潜在方法。然而，具有高过电位和有限寿命的阳极催化剂（由氯离子诱导的竞争性化学反应引起）阻碍了用于制氢的海水电解系统。在此，我们展示了一种在泡沫镍上的柠檬酸根阴离子（CA）修饰的镍铁层状双氢氧化物纳米片阵列（NiFe LDH@NiFe-CA/NF），它作为一种高效且稳定的电催化剂用于长期碱性海水氧化。实现1000 mA cm的电流密度仅需387 mV的低过电位，优于NiFe LDH/NF（414 mV）。此外，由于其抗腐蚀特性，NiFe LDH@NiFe-CA/NF在1000 mA cm下表现出300小时的连续析氧测试。此外，所制备的电池在300 mA cm（60°C，6 M KOH + 海水）下能够稳定运行，仅需1.69 V，实现了海水分解的低能耗。
