journal article·2024-11Open access

Stable Seawater Electrolysis Over 10 000 H via Chemical Fixation of Sulfate on NiFeBa‐LDH

Haocheng Chen, Pingying Liu, Wenbo Li, Wenwen Xu, Yingjie Wen, Sixie Zhang, Li Yi, Yeqi Dai, Xu Chen, Sheng Dai, Ziqi Tian, Liang Chen, Zhiyi Lu

Advanced Materials· Volume 36· Issue 45

Abstract

Abstract Although hydrogen production through seawater electrolysis combined with offshore renewable energy can significantly reduce the cost, the corrosive anions in seawater strictly limit the commercialization of direct seawater electrolysis technology. Here, it is discovered that electrolytic anode can be uniformly protected in a seawater environment by constructing NiFeBa‐LDH catalyst assisted with additional SO 4 2− in the electrolyte. In experiments, the NiFeBa‐LDH achieves unprecedented stability over 10 000 h at 400 mA cm −2 in both alkaline saline electrolyte and alkaline seawater. Characterizations and simulations reveal that the atomically dispersed Ba 2+ enables the chemical fixation of free SO 4 2− on the surface, which generates a dense SO 4 2− layer to repel Cl − along with the preferentially adsorbed SO 4 2− in the presence of an applied electric field. In terms of the simplicity and effectiveness of catalyst design, it is confident that it can be a beacon for the commercialization of seawater electrolysis technology.
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Research context

OpenAlex topics: Advanced battery technologies research · Advancements in Battery Materials · Electrocatalysts for Energy Conversion

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo Zhejiang 315201 P. R. China

College of Materials Science and Engineering Zhejiang University of Technology Hangzhou Zhejiang 310032 P. R. China

School of Materials Science and Engineering Jingdezhen Ceramic University Jingdezhen Jiangxi 333403 P. R. China

Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering Feringa Nobel Prize Scientist Joint Research Centre Frontiers Science Center for Materiobiology and Dynamic Chemistry Institute of Fine Chemicals School of Chemistry and Molecular Engineering East China University of Science & Technology Shanghai 200237 P. R. China

University of Chinese Academy of Sciences Beijing 100049 P. R. China

Funding

National Natural Science Foundation of China · Nanjing University

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