Membrane electrode assembly-based photoelectrochemical cell for hydrogen generation |
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Authors: | King-Tsai Jeng Yu-Chang LiuYung-Fang Leu Yu-Zhen ZengJen-Chren Chung Tsong-Yang Wei |
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Affiliation: | Institute of Nuclear Energy Research (INER), 1000 Wenhua Road, Longtan, Taoyuan 32546, Taiwan |
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Abstract: | A novel photoelectrochemical cell (PEC) for generation of hydrogen via photocatalytic water splitting is proposed and investigated. At the heart of the PEC is a membrane electrode assembly (MEA) integrated with Degussa P25 TiO2 powder as a model photocatalyst for the photoanode and Pt catalyst powder for the dark cathode, respectively. It serves as a compact photocatalytic reactor for water splitting as well as an effective separator for the generated hydrogen and oxygen. The unique characteristic of the MEA-based PEC is that the use of co-catalyst, sacrificial reagent and supporting electrolyte in the cell is totally not required. The novel PEC can be operated without addition of water in the cathode compartment resulting in improved photo conversion efficiency. In addition, the application of a Degussa P25/BiVO4 mixed photocatalyst was found to significantly enhance the hydrogen generation. Further improvements for the MEA-based PEC utilizing solar energy are also proposed. |
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Keywords: | Photocatalytic water splitting Hydrogen generation Photoelectrochemical cell Membrane electrode assembly Photo conversion efficiency |
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