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Characterization of a Photoelectrochemical Cell Using Porous TiO2 and Its Application to a Z-Scheme System for Water Splitting in Combination with a P-Type InP Photocathode

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Specific surface area is one of the most important factors for improving the photoelectrochemical properties of photoelectrodes. We have investigated the interface resistance between TiO2 and an electrolyte solution on increasing the specific surface area through the impedance analysis. A change in morphology was found to produce an increase in the photocurrent associated with proton production, thus promoting H2 evolution in the photocathode. A Z-scheme system with no need of an external electrical bias was employed using a porous TiO2 photoanode, a P-type InP photocathode, and platinum as electrocatalyst. A conversion efficiency of 0.35% was achieved for solar water splitting in a neutral electrolyte solution, as determined by quantifying the amount of hydrogen evolved.
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Keywords: InP; Photoelectrochemical Cell; Porous TiO2; Solar Water Splitting; Z-Scheme

Document Type: Research Article

Affiliations: Department of Chemical and Biomolecular Engineering, Sogang University, Seoul 121-742, Republic of Korea

Publication date: August 1, 2017

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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