Affiliation:
1. College of Chemistry, Chemical Engineering and Materials Science Shandong Normal University Jinan Shandong 250014 China
2. Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Chengdu Sichuan 610054 China
3. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education School of Energy and Environment Southeast University Nanjing Jiangsu 211189 China
4. Department of Otolaryngology‐Head & Neck Surgery West China Hospital Sichuan University Chengdu Sichuan 610041 China
5. Institute for Advanced Study Chengdu University Chengdu Sichuan 610106 China
6. Laoshan Laboratory Qingdao Shandong 266237 China
Abstract
AbstractRenewable electricity‐driven seawater splitting presents a green, effective, and promising strategy for building hydrogen (H2)‐based energy systems (e.g., storing wind power as H2), 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 (O2) evolution material, can be boosted by employing tungstate (WO42–) as the intercalated guest. Notably, insertion of WO42− to LDH layers upgrades the reaction kinetics and selectivity, attaining higher current densities with ≈100% O2 generation efficiency in alkaline seawater. Moreover, after a 350 h test at 1000 mA cm−2, only trace active chlorine can be detected in the electrolyte. Additionally, O2 evolution follows lattice oxygen mechanism on NiFe LDH with intercalated WO42−.
Funder
National Natural Science Foundation of China
Cited by
7 articles.
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