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- Title
Photoassisted Oxygen Reduction Reaction in H<sub>2</sub>-O<sub>2</sub> Fuel Cells.
- Authors
Zhang, Bingqing; Wang, Shengyang; Fan, Wenjun; Ma, Weiguang; Liang, Zhenxing; Shi, Jingying; Liao, Shijun; Li, Can
- Abstract
The oxygen reduction reaction (ORR) is a key step in H2-O2 fuel cells, which, however, suffers from slow kinetics even for state-of-the-art catalysts. In this work, by making use of photocatalysis, the ORR was significantly accelerated with a polymer semiconductor (polyterthiophene). The onset potential underwent a positive shift from 0.66 to 1.34 V, and the current was enhanced by a factor of 44 at 0.6 V. The improvement was further confirmed in a proof-of-concept light-driven H2-O2 fuel cell, in which the open circuit voltage ( Voc) increased from 0.64 to 1.18 V, and the short circuit current ( Jsc) was doubled. This novel tandem structure combining a polymer solar cell and a fuel cell enables the simultaneous utilization of photo- and electrochemical energy, showing promising potential for applications in energy conversion and storage.
- Subjects
OXYGEN reduction; ANALYTICAL mechanics; CATALYSTS; PHOTOCATALYSIS; OPEN-circuit voltage
- Publication
Angewandte Chemie International Edition, 2016, Vol 55, Issue 47, p14748
- ISSN
1433-7851
- Publication type
Article
- DOI
10.1002/anie.201607118