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

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 signi...

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Published inAngewandte Chemie Vol. 127; no. 16; pp. 4952 - 4957
Main Authors Wu, Yizhen, Chen, Mingxing, Han, Yongzhen, Luo, Hongxia, Su, Xiaojun, Zhang, Ming-Tian, Lin, Xiaohuan, Sun, Junliang, Wang, Lei, Deng, Liang, Zhang, Wei, Cao, Rui
Format Journal Article
LanguageEnglish
German
Published Weinheim WILEY-VCH Verlag 13.04.2015
WILEY‐VCH Verlag
Wiley Subscription Services, Inc
Subjects
Acetates
Aqueous solutions
Catalysis
Catalysts
Chemistry
Eisen
Electrodes
Elektrokatalyse
Filmpräparation
Iron
Low energy
Oxidation
Phosphates
Photosynthesis
Sauerstoffentwicklung
Thin films
Wasseroxidation
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Summary: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 FeII ions in acetate buffer at pH 7.0 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 756 h−1 at an applied overpotential of 530 mV. 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 O2 evolution in neutral aqueous media. Ein Katalysator mit eiserner Kraft: Eisen‐basierte Filme wurden mittels Cyclovoltammetrie innerhalb einer Minute auf Elektroden abgeschieden. Die Filme, die eine sehr niedrige Eisenbeladung aufwiesen, waren bemerkenswert stabil und katalysierten die Wasseroxidation in neutralem wässrigem Medium mit hoher Umsatzfrequenz (siehe Bild; ITO=Indiumzinnoxid).
Bibliography:Thousand Talents Program
We are grateful for support from the "Thousand Talents Program" of China, the National Natural Science Foundation of China under grant no. 21101170, the Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China.
ArticleID:ANGE201412389
National Natural Science Foundation of China - No. 21101170
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ark:/67375/WNG-66L0KPBW-H
We are grateful for support from the “Thousand Talents Program” of China, the National Natural Science Foundation of China under grant no. 21101170, the Fundamental Research Funds for the Central Universities, and the Research Funds of Renmin University of China.
These authors contributed equally to this work.
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SourceType-Scholarly Journals-1
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ISSN:0044-8249
1521-3757
DOI:10.1002/ange.201412389