Hetero MOF-On-MOF of Ni-BDC/NH2-MIL-88B(Fe) Enables Efficient Electrochemical Seawater Oxidation

被引：52

作者：

Bao, Yanji ^{[1
]}

Ru, Haifeng ^{[1
]}

Wang, Yifeng ^{[1
]}

Zhang, Kexi ^{[1
]}

Yu, Rentong ^{[1
]}

Wu, Qiang ^{[2
]}

Yu, Aimin ^{[3
]}

Li, Dong-Sheng ^{[4
]}

Sun, Chenghua ^{[3
]}

Li, Weiwei ^{[1
]}

Tu, Jinchun ^{[1
]}

机构：

[1] Hainan Univ, Coll Mat Sci & Engn, State Key Lab Marine Resource Utilizat South China, Haikou 570228, Peoples R China

[2] Hainan Med Univ, Haikou 571199, Peoples R China

[3] Swinburne Univ Technol, Dept Chem & Biotechnol, Hawthorn, Vic 3122, Australia

[4] China Three Gorges Univ, Coll Mat & Chem Engn, Key Lab Inorgan Nonmet Crystalline & Energy Conver, Yichang 443002, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2024年 / 34卷 / 22期

基金：

中国国家自然科学基金; 海南省自然科学基金;

关键词：

electrocatalyst; heterojunction; metal-organic framework-on-metal-organic framework; oxygen evolution reaction; seawater; ARRAYS; CORROSION;

D O I：

10.1002/adfm.202314611

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Seawater electrolysis is a sustainable technology for producing hydrogen that would neither cause global freshwater shortages nor create carbon emissions. However, this technology is severely hampered by the insufficient stability and the competition from the chlorine evolution reaction (ClER) in actual application. Herein, a metal-organic framework (MOF)-on-MOF heterojunction (Ni-BDC/NH2-MIL-88B(Fe)) denoted as (Ni-BDC/NM88B(Fe)) is synthesized as an effective oxygen evolution reaction (OER) electrocatalyst for high-performance seawater electrolysis, which exhibits a long stability of 200 h and low overpotentials of 232 and 299 mV at 100 mA cm(-2) in alkaline freshwater and seawater solution, respectively. The exceptional performance is attributed to the rapid self-reconstruction of Ni-BDC/NM88B(Fe) to produce NiFeOOH protective layer, thereby avoiding ClER-induced dissolution. Moreover, the interface interaction between Ni-BDC and NM88B(Fe) could form the Ni & horbar;O & horbar;Fe bonds in Ni-BDC/NM88B(Fe) to promote the electron transfer and lower the energy barrier of the rate-determining step, thereby accelerating the OER. These electrochemical properties make it intriguing candidate as an efficient electrocatalyst for practical alkaline seawater electrolysis.

引用

页数：11

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