Boosting Electrocatalytic Water Oxidation by Creating Defects and Lattice-Oxygen Active Sites on Ni-Fe Nanosheets

被引：17

作者：

Chen, Chi ^{[1
]}

Zhang, Peili ^{[1
]}

Wang, Mei ^{[1
]}

Zheng, Dehua ^{[2
]}

Chen, Junchi ^{[1
]}

Li, Fusheng ^{[1
]}

Wu, Xiujuan ^{[1
]}

Fan, Ke ^{[1
]}

Sun, Licheng ^{[1
,3
,4
]}

机构：

[1] Dalian Univ Technol, Inst Artificial Photosynth, State Key Lab Fine Chem, DUT KTH Joint Educ & Res Ctr Mol Devices, Dalian 116024, Peoples R China

[2] Qingdao Univ Sci & Technol, Coll Chem & Mol Engn, Key Lab Ecochem Engn, Qingdao 266042, Peoples R China

[3] Dalian Univ Technol, Inst Energy Sci & Technol, Dalian 116024, Peoples R China

[4] KTH Royal Inst Technol, Dept Chem, Sch Engn Sci Chem Biotechnol & Hlth, S-10044 Stockholm, Sweden

来源：

CHEMSUSCHEM | 2020年 / 13卷 / 18期

基金：

中国国家自然科学基金; 瑞典研究理事会;

关键词：

DOUBLE HYDROXIDE; EVOLUTION REACTION; OXIDES;

D O I：

10.1002/cssc.202001362

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Layered nickel-iron oxide/hydroxide nanosheets have proven to be the most efficient catalyst for the water oxidation reaction. Introducing structural defects to the nanosheets is a particularly attractive method for increasing the number of active sites and tailoring the intrinsic electronic properties. Herein, defects were introduced on Ni-Fe nanosheets through sequentially electrodoping and dedoping the surface of the material with tetramethylammonium ions. The as-prepared defect-rich Ni-Fe nanosheets showed an enhanced catalytic performance for the oxygen evolution reaction (OER) compared with conventional NiFe layered double hydroxides (LDHs), exhibiting an overpotential of only 172 mV at the current density of 10 mA cm(-2). The relationship between pH and OER activity indicated that the lattice oxygens participated in the catalytic OER process as active sites. This work provides new insights into the understanding of the structure-activity relationship of layered materials and helps to develop new methods to implement defects on such frameworks aided by organic molecules.

引用

页码：5067 / 5072

页数：6

共 38 条

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