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

被引：756

作者：

Kuang, Yun ^{[1
,2
,3
]}

Kenney, Michael J. ^{[1
]}

Meng, Yongtao ^{[1
,4
]}

Hung, Wei-Hsuan ^{[1
,5
]}

Liu, Yijin ^{[6
]}

Huang, Jianan Erick ^{[1
]}

Prasanna, Rohit ^{[7
]}

Li, Pengsong ^{[2
,3
]}

Li, Yaping ^{[2
,3
]}

Wang, Lei ^{[8
,9
]}

Lin, Meng-Chang ^{[4
]}

McGehee, Michael D. ^{[7
,10
]}

Sun, Xiaoming ^{[2
,3
,4
]}

Dai, Hongjie ^{[1
]}

机构：

[1] Stanford Univ, Dept Chem, Stanford, CA 94305 USA

[2] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[3] Beijing Univ Chem Technol, Beijing Adv Innovat Ctr Soft Matter Sci & Engn, Beijing 100029, Peoples R China

[4] Shandong Univ Sci & Technol, Coll Elect Engn & Automat, Qingdao 266590, Shandong, Peoples R China

[5] Feng Chia Univ, Dept Mat Sci & Engn, Taichung 40724, Taiwan

[6] SLAC Natl Accelerator Lab, Stanford Synchrotron Radiat Light Source, Menlo Pk, CA 94025 USA

[7] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[8] Tianjin Univ Technol, Inst New Energy Mat, Ctr Electron Microscopy, Tianjin 300384, Peoples R China

[9] Tianjin Univ Technol, Sch Mat, Tianjin Key Lab Adv Funct Porous Mat, Tianjin 300384, Peoples R China

[10] Univ Colorado, Dept Chem Engn, Boulder, CO 80309 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2019年 / 116卷 / 14期

基金：

美国国家科学基金会;

关键词：

seawater splitting; hydrogen production; electrocatalysis; anticorrosion; solar driven; EVOLUTION REACTION; ION-SELECTIVITY; OXIDE ANODES; WATER; ELECTROCATALYST; FILMS; ELECTROLYSIS; CATALYSTS;

D O I：

10.1073/pnas.1900556116

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

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.

引用

页码：6624 / 6629

页数：6

共 35 条

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