BiVO4/CuWO4 Heterojunction Photoanodes for Efficient Solar Driven Water Oxidation

Satyananda Kishore Pilli; Todd G. Deutsch; Thomas E. Furtak; Logan D. Brown; John A. Turner; Andrew M. Herring

doi:10.1039/C2CP44577H

BiVO4/CuWO4 Heterojunction Photoanodes for Efficient Solar Driven Water Oxidation

Satyananda Kishore Pilli, Todd G. Deutsch, Thomas E. Furtak, Logan D. Brown, John A. Turner, Andrew M. Herring

Chemistry and Nanoscience

Colorado School of Mines

Research output: Contribution to journal › Article › peer-review

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Abstract

BiVO₄/CuWO₄ heterojunction electrodes were prepared using spray deposition of a highly porous bismuth vanadate film onto the surface of an electrodeposited three dimensional network connected copper tungstate. Bilayer BiVO₄/CuWO₄/fluorine doped tin oxide glass (FTO) electrodes demonstrated higher photocurrent magnitudes than either with BiVO₄/FTO or CuWO₄/FTO electrodes in 1.0 M Na ₂SO₄ electrolyte buffered at pH 7. The photocurrent is enhanced by the formation of the heterojunction that aids charge carrier collection brought about by the band edge offsets. When the pH 7 buffered electrolytes contained 1.0 M bicarbonate is employed instead of 1.0 M sulfate, the charge transfer resistance was decreased. This led to nearly 1.8 times the photocurrent density at 1.0 V vs. Ag/AgCl. The photocurrent was stable over 24 hours in bicarbonate electrolyte. This journal is

Original language	American English
Pages (from-to)	3273-3278
Number of pages	6
Journal	Physical Chemistry Chemical Physics
Volume	15
Issue number	9
DOIs	https://doi.org/10.1039/C2CP44577H https://doi.org/10.1039/c2cp44577h
State	Published - 2013

NREL Publication Number

NREL/JA-5600-58335

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title = "BiVO4/CuWO4 Heterojunction Photoanodes for Efficient Solar Driven Water Oxidation",

abstract = "BiVO4/CuWO4 heterojunction electrodes were prepared using spray deposition of a highly porous bismuth vanadate film onto the surface of an electrodeposited three dimensional network connected copper tungstate. Bilayer BiVO4/CuWO4/fluorine doped tin oxide glass (FTO) electrodes demonstrated higher photocurrent magnitudes than either with BiVO4/FTO or CuWO4/FTO electrodes in 1.0 M Na 2SO4 electrolyte buffered at pH 7. The photocurrent is enhanced by the formation of the heterojunction that aids charge carrier collection brought about by the band edge offsets. When the pH 7 buffered electrolytes contained 1.0 M bicarbonate is employed instead of 1.0 M sulfate, the charge transfer resistance was decreased. This led to nearly 1.8 times the photocurrent density at 1.0 V vs. Ag/AgCl. The photocurrent was stable over 24 hours in bicarbonate electrolyte. This journal is",

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AU - Pilli, Satyananda Kishore

AU - Deutsch, Todd G.

AU - Furtak, Thomas E.

AU - Brown, Logan D.

AU - Turner, John A.

AU - Herring, Andrew M.

PY - 2013

Y1 - 2013

N2 - BiVO4/CuWO4 heterojunction electrodes were prepared using spray deposition of a highly porous bismuth vanadate film onto the surface of an electrodeposited three dimensional network connected copper tungstate. Bilayer BiVO4/CuWO4/fluorine doped tin oxide glass (FTO) electrodes demonstrated higher photocurrent magnitudes than either with BiVO4/FTO or CuWO4/FTO electrodes in 1.0 M Na 2SO4 electrolyte buffered at pH 7. The photocurrent is enhanced by the formation of the heterojunction that aids charge carrier collection brought about by the band edge offsets. When the pH 7 buffered electrolytes contained 1.0 M bicarbonate is employed instead of 1.0 M sulfate, the charge transfer resistance was decreased. This led to nearly 1.8 times the photocurrent density at 1.0 V vs. Ag/AgCl. The photocurrent was stable over 24 hours in bicarbonate electrolyte. This journal is

AB - BiVO4/CuWO4 heterojunction electrodes were prepared using spray deposition of a highly porous bismuth vanadate film onto the surface of an electrodeposited three dimensional network connected copper tungstate. Bilayer BiVO4/CuWO4/fluorine doped tin oxide glass (FTO) electrodes demonstrated higher photocurrent magnitudes than either with BiVO4/FTO or CuWO4/FTO electrodes in 1.0 M Na 2SO4 electrolyte buffered at pH 7. The photocurrent is enhanced by the formation of the heterojunction that aids charge carrier collection brought about by the band edge offsets. When the pH 7 buffered electrolytes contained 1.0 M bicarbonate is employed instead of 1.0 M sulfate, the charge transfer resistance was decreased. This led to nearly 1.8 times the photocurrent density at 1.0 V vs. Ag/AgCl. The photocurrent was stable over 24 hours in bicarbonate electrolyte. This journal is

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BiVO4/CuWO4 Heterojunction Photoanodes for Efficient Solar Driven Water Oxidation

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