Solar-driven, highly sustained splitting of seawater into hydrogen and oxygen fuels

Yun Kuang, Michael J. Kenney, Yongtao Meng, Wei Hsuan Hung, Yijin Liu, Jianan Erick Huang, Rohit Prasanna, Pengsong Li, Yaping Li, Lei Wang, Meng Chang Lin, Michael D. McGehee, Xiaoming Sun, Hongjie Dai

研究成果: 雜誌貢獻文章同行評審

206 引文 斯高帕斯(Scopus)

摘要

Electrolysis of water to generate hydrogen fuel is an attractive renewable energy storage technology. However, grid-scale freshwater electrolysis would put a heavy strain on vital water resources. Developing cheap electrocatalysts and electrodes that can sustain seawater splitting without chloride corrosion could address the water scarcity issue. Here we present a multilayer anode consisting of a nickel–iron hydroxide (NiFe) electrocatalyst layer uniformly coated on a nickel sulfide (NiSx) layer formed on porous Ni foam (NiFe/NiSx-Ni), affording superior catalytic activity and corrosion resistance in solar-driven alkaline seawater electrolysis operating at industrially required current densities (0.4 to 1 A/cm 2 ) over 1,000 h. A continuous, highly oxygen evolution reaction-active NiFe electrocatalyst layer drawing anodic currents toward water oxidation and an in situ-generated polyatomic sulfate and carbonate-rich passivating layers formed in the anode are responsible for chloride repelling and superior corrosion resistance of the salty-water-splitting anode.
原文英語
頁(從 - 到)6624-6629
頁數6
期刊Proceedings of the National Academy of Sciences of the United States of America
116
發行號14
DOIs
出版狀態已發佈 - 4月 2019
對外發佈

ASJC Scopus subject areas

  • 多學科

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