Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density

Chengzhong Wang; Mingze Zhu; Zhengyi Cao; Ping Zhu; Yunqing Cao; Xiaoyong Xu; Chunxiang Xu; Zongyou Yin

doi:10.1016/j.apcatb.2021.120071

Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density

Chengzhong Wang, Mingze Zhu, Zhengyi Cao, Ping Zhu, Yunqing Cao, Xiaoyong Xu^*, Chunxiang Xu^*, Zongyou Yin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

230 Citations (Scopus)

Abstract

Direct seawater electrolysis is an attractive technology for scalable hydrogen production as well as seawater desalination, which however demands efficient and robust anodic catalysts that can sustain oxygen evolution reaction (OER) against chloride corrosion. Here we report an outstanding anodic catalyst consisting of three-dimensional standing arrays of hetero-lateral Ni₃S₂/Co₃S₄ (NiCoS) nanosheets uniformly grown on Ni foam for alkaline seawater electrolysis, in which the in-situ derived Ni/Co (oxy)hydroxide surface layer endows abundant active sites and superior resistance to chloride corrosion. Combined with an efficient hydrogen evolution reaction catalyst of Ni/Mo sulfides, a two-electrode electrolyzer affords an industrial-level high current density up to 800 mA cm⁻² at a super low voltage of 2.08 V for overall alkaline seawater splitting steadily over 100 h without chloride corrosion at room temperature. Furthermore, powered by a commercial single III-V triple-junction solar cell, the integrated system demonstrates light-driven overall seawater splitting with an impressive 15.13 % solar-to-hydrogen efficiency. This work is instrumental in the development of seawater electrolysis for sustainable hydrogen production by renewable energy sources.

Original language	English
Article number	120071
Journal	Applied Catalysis B: Environmental
Volume	291
DOIs	https://doi.org/10.1016/j.apcatb.2021.120071
Publication status	Published - 15 Aug 2021

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title = "Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density",

abstract = "Direct seawater electrolysis is an attractive technology for scalable hydrogen production as well as seawater desalination, which however demands efficient and robust anodic catalysts that can sustain oxygen evolution reaction (OER) against chloride corrosion. Here we report an outstanding anodic catalyst consisting of three-dimensional standing arrays of hetero-lateral Ni3S2/Co3S4 (NiCoS) nanosheets uniformly grown on Ni foam for alkaline seawater electrolysis, in which the in-situ derived Ni/Co (oxy)hydroxide surface layer endows abundant active sites and superior resistance to chloride corrosion. Combined with an efficient hydrogen evolution reaction catalyst of Ni/Mo sulfides, a two-electrode electrolyzer affords an industrial-level high current density up to 800 mA cm−2 at a super low voltage of 2.08 V for overall alkaline seawater splitting steadily over 100 h without chloride corrosion at room temperature. Furthermore, powered by a commercial single III-V triple-junction solar cell, the integrated system demonstrates light-driven overall seawater splitting with an impressive 15.13 % solar-to-hydrogen efficiency. This work is instrumental in the development of seawater electrolysis for sustainable hydrogen production by renewable energy sources.",

keywords = "Bimetallic sulfides, Industrial electrolysis, Seawater splitting, Solar-to-hydrogen conversion",

author = "Chengzhong Wang and Mingze Zhu and Zhengyi Cao and Ping Zhu and Yunqing Cao and Xiaoyong Xu and Chunxiang Xu and Zongyou Yin",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = aug,

day = "15",

doi = "10.1016/j.apcatb.2021.120071",

language = "English",

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T1 - Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density

AU - Wang, Chengzhong

AU - Zhu, Mingze

AU - Cao, Zhengyi

AU - Zhu, Ping

AU - Cao, Yunqing

AU - Xu, Xiaoyong

AU - Xu, Chunxiang

AU - Yin, Zongyou

PY - 2021/8/15

Y1 - 2021/8/15

N2 - Direct seawater electrolysis is an attractive technology for scalable hydrogen production as well as seawater desalination, which however demands efficient and robust anodic catalysts that can sustain oxygen evolution reaction (OER) against chloride corrosion. Here we report an outstanding anodic catalyst consisting of three-dimensional standing arrays of hetero-lateral Ni3S2/Co3S4 (NiCoS) nanosheets uniformly grown on Ni foam for alkaline seawater electrolysis, in which the in-situ derived Ni/Co (oxy)hydroxide surface layer endows abundant active sites and superior resistance to chloride corrosion. Combined with an efficient hydrogen evolution reaction catalyst of Ni/Mo sulfides, a two-electrode electrolyzer affords an industrial-level high current density up to 800 mA cm−2 at a super low voltage of 2.08 V for overall alkaline seawater splitting steadily over 100 h without chloride corrosion at room temperature. Furthermore, powered by a commercial single III-V triple-junction solar cell, the integrated system demonstrates light-driven overall seawater splitting with an impressive 15.13 % solar-to-hydrogen efficiency. This work is instrumental in the development of seawater electrolysis for sustainable hydrogen production by renewable energy sources.

AB - Direct seawater electrolysis is an attractive technology for scalable hydrogen production as well as seawater desalination, which however demands efficient and robust anodic catalysts that can sustain oxygen evolution reaction (OER) against chloride corrosion. Here we report an outstanding anodic catalyst consisting of three-dimensional standing arrays of hetero-lateral Ni3S2/Co3S4 (NiCoS) nanosheets uniformly grown on Ni foam for alkaline seawater electrolysis, in which the in-situ derived Ni/Co (oxy)hydroxide surface layer endows abundant active sites and superior resistance to chloride corrosion. Combined with an efficient hydrogen evolution reaction catalyst of Ni/Mo sulfides, a two-electrode electrolyzer affords an industrial-level high current density up to 800 mA cm−2 at a super low voltage of 2.08 V for overall alkaline seawater splitting steadily over 100 h without chloride corrosion at room temperature. Furthermore, powered by a commercial single III-V triple-junction solar cell, the integrated system demonstrates light-driven overall seawater splitting with an impressive 15.13 % solar-to-hydrogen efficiency. This work is instrumental in the development of seawater electrolysis for sustainable hydrogen production by renewable energy sources.

KW - Bimetallic sulfides

KW - Industrial electrolysis

KW - Seawater splitting

KW - Solar-to-hydrogen conversion

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DO - 10.1016/j.apcatb.2021.120071

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VL - 291

JO - Applied Catalysis B: Environmental

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Heterogeneous bimetallic sulfides based seawater electrolysis towards stable industrial-level large current density

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