Fast and Simple Preparation of Iron-Based Thin Films as Highly Efficient Water-Oxidation Catalysts in Neutral Aqueous Solution

被引：269

作者：

Wu, Yizhen ^{[1
]}

Chen, Mingxing ^{[1
]}

Han, Yongzhen ^{[1
]}

Luo, Hongxia ^{[1
]}

Su, Xiaojun ^{[2
]}

Zhang, Ming-Tian ^{[2
]}

Lin, Xiaohuan ^{[3
]}

Sun, Junliang ^{[3
]}

Wang, Lei ^{[4
]}

Deng, Liang ^{[4
]}

Zhang, Wei ^{[5
]}

Cao, Rui ^{[1
,5
]}

机构：

[1] Renmin Univ China, Dept Chem, Beijing 100872, Peoples R China

[2] Tsinghua Univ, Dept Chem, CBMS, Beijing 100084, Peoples R China

[3] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China

[4] Chinese Acad Sci, Shanghai Inst Organ Chem, State Key Lab Organometall Chem, Shanghai 200032, Peoples R China

[5] Shaanxi Normal Univ, Sch Chem & Chem Engn, Xian 710119, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2015年 / 54卷 / 16期

基金：

中国国家自然科学基金;

关键词：

electrocatalysis; film preparation; iron; oxygen evolution; water splitting; OXYGEN EVOLUTION REACTION; EVOLVING CATALYST; ELECTROCATALYSTS; HYDROXIDE; PHOSPHATE; ELECTRODEPOSITION; COMPLEXES; GRAPHENE; OXIDES;

D O I：

10.1002/anie.201412389

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Water oxidation is the key step in natural and artificial photosynthesis for solar-energy conversion. As this process is thermodynamically unfavorable and is challenging from a kinetic point of view, the development of highly efficient catalysts with low energy cost is a subject of fundamental significance. Herein, we report on iron-based films as highly efficient water-oxidation catalysts. The films can be quickly deposited onto electrodes from Fe-II ions in acetate buffer at pH7.0 by simple cyclic voltammetry. The extremely low iron loading on the electrodes is critical for improved atom efficiency for catalysis. Our results showed that this film could catalyze water oxidation in neutral phosphate solution with a turnover frequency (TOF) of 756h(-1) at an applied overpotential of 530mV. The significance of this approach includes the use of earth-abundant iron, the fast and simple method for catalyst preparation, the low catalyst loading, and the large TOF for O-2 evolution in neutral aqueous media.

引用

页码：4870 / 4875

页数：6

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