Unassisted water splitting from bipolar Pt/dye-sensitized TiO 2 photoelectrode arrays

Direct photodecomposition of water to yield hydrogen and oxygen was achieved with bipolar Pt/dye-sensitized TiO2 photoelectrode panels, capable of vectorial electron transfer. This novel photoelectrochemical cell, which can overcome the problems of the location of the semiconductor bandedges relative to the water decomposition energy level and the requirement of dye and semiconductor stability during water decomposition in aqueous solution, splits water directly upon illumination without any additional energy input. The maximum hydrogen evolution efficiency of this system, based on the short-circuit current, was 3.7%. © 2005 The Electrochemical Society. DOI: 10.1149/1.2077090 All rights reserved.

[1]  Allen J. Bard,et al.  Artificial Photosynthesis: Solar Splitting of Water to Hydrogen and Oxygen , 1995 .

[2]  James R. White,et al.  Semiconductor Electrodes LVI . Principles of Multijunction Electrodes and Photoelectrosynthesis at Texas Instruments' p/n‐Si Solar Arrays , 1985 .

[3]  T. Mallouk,et al.  Bipolar TiO2/Pt semiconductor photoelectrodes and multielectrode arrays for unassisted photolytic water splitting , 1986 .

[4]  H. Tributsch,et al.  ELECTROCHEMISTRY OF EXCITED MOLECULES: PHOTO‐ELECTROCHEMICAL REACTIONS OF CHLOROPHYLLS * , 1971 .

[5]  James R. Bolton,et al.  Limiting and realizable efficiencies of solar photolysis of water , 1985, Nature.

[6]  Turner,et al.  A monolithic photovoltaic-photoelectrochemical device for hydrogen production via water splitting , 1998, Science.

[7]  A. G. Sarkisyan,et al.  Study of quantum efficiency of doped Fe2O3 ceramic photoelectrodes , 1994 .

[8]  Peng Wang,et al.  A stable quasi-solid-state dye-sensitized solar cell with an amphiphilic ruthenium sensitizer and polymer gel electrolyte , 2003, Nature materials.

[9]  Alan Campion,et al.  Bipolar CdSe/CoS semiconductor photoelectrode arrays for unassisted photolytic water splitting , 1987 .

[10]  M. Grätzel,et al.  A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 films , 1991, Nature.

[11]  Adam Heller,et al.  Hydrogen-Evolving Solar Cells , 1984, Science.

[12]  P. Liska,et al.  Engineering of efficient panchromatic sensitizers for nanocrystalline TiO(2)-based solar cells. , 2001, Journal of the American Chemical Society.

[13]  J. Turner,et al.  Photoelectrolysis of HBr and HI Using a Monolithic Combined Photoelectrochemical/Photovoltaic Device , 1999 .