Wang Hefeng, Li Zixiao, Hong Shaohuan, Yang Chaoxin, Liang Jie, Dong Kai, Zhang Hui, Wang Xiaoyan, Zhang Min, Sun Shengjun, Yao Yongchao, Luo Yongsong, Liu Qian, Li Luming, Chu Wei, Du Miao, Gong Feng, Sun Xuping, Tang Bo
College of Chemistry, Chemical Engineering and Materials Science, Shandong Normal University, Jinan, Shandong, 250014, China.
Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, China.
Small. 2024 Jul;20(28):e2311431. doi: 10.1002/smll.202311431. Epub 2024 Feb 16.
Renewable electricity-driven seawater splitting presents a green, effective, and promising strategy for building hydrogen (H)-based energy systems (e.g., storing wind power as H), especially in many coastal cities. The abundance of Cl in seawater, however, will cause severe corrosion of anode catalyst during the seawater electrolysis, and thus affect the long-term stability of the catalyst. Herein, seawater oxidation performances of NiFe layered double hydroxides (LDH), a classic oxygen (O) evolution material, can be boosted by employing tungstate (WO ) as the intercalated guest. Notably, insertion of WO to LDH layers upgrades the reaction kinetics and selectivity, attaining higher current densities with ≈100% O generation efficiency in alkaline seawater. Moreover, after a 350 h test at 1000 mA cm, only trace active chlorine can be detected in the electrolyte. Additionally, O evolution follows lattice oxygen mechanism on NiFe LDH with intercalated WO .
可再生电力驱动的海水分解为构建基于氢（H）的能源系统（例如，将风能存储为氢）提供了一种绿色、有效且有前景的策略，特别是在许多沿海城市。然而，海水中丰富的Cl会在海水电解过程中导致阳极催化剂的严重腐蚀，从而影响催化剂的长期稳定性。在此，作为一种经典的析氧材料，镍铁层状双氢氧化物（LDH）的海水氧化性能可以通过使用钨酸盐（WO ）作为插层客体来提高。值得注意的是，将WO 插入LDH层可提升反应动力学和选择性，在碱性海水中以≈100%的析氧效率获得更高的电流密度。此外，在1000 mA cm 下进行350 h测试后，电解液中仅能检测到痕量活性氯。此外，在插层有WO 的NiFe LDH上，析氧遵循晶格氧机制。
