Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings

Matthew T. McDowell, Michael F. Lichterman, Joshua M. Spurgeon, Shu Hu, Ian D. Sharp, Bruce S. Brunschwig, Nathan S Lewis

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

Ultrathin dual layers of TiO2 and Ni have been used to stabilize polycrystalline BiVO4 photoanodes against photocorrosion in an aqueous alkaline (pH = 13) electrolyte. Conformal, amorphous TiO2 layers were deposited on BiVO4 thin films by atomic-layer deposition, with Ni deposited onto the TiO2 by sputtering. Under simulated air mass 1.5 illumination, the dual-layer coating extended the lifetime of the BiVO4 photoanodes during photoelectrochemical water oxidation from minutes, for bare BiVO4, to hours, for the modified electrodes. X-ray photoelectron spectroscopy showed that these layers imparted chemical stability to the semiconductor/electrolyte interface. Transmission electron microscopy revealed the structure and morphology of the polycrystalline BiVO4 film as well as of the thin coating layers. This work demonstrates that protection schemes based on ultrathin corrosion-resistant overlayers can be applied beneficially to polycrystalline photoanode materials under conditions relevant to efficient solar-driven water-splitting systems.

Original languageEnglish
Pages (from-to)19618-19624
Number of pages7
JournalJournal of Physical Chemistry C
Volume118
Issue number34
DOIs
Publication statusPublished - 2014

Fingerprint

vanadates
Bismuth
bismuth
Electrolytes
coatings
Coatings
Polycrystalline materials
Atomic layer deposition
Chemical stability
Sputtering
Water
X ray photoelectron spectroscopy
Lighting
Corrosion
Semiconductor materials
Transmission electron microscopy
Thin films
Oxidation
Electrodes
electrolytes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

McDowell, M. T., Lichterman, M. F., Spurgeon, J. M., Hu, S., Sharp, I. D., Brunschwig, B. S., & Lewis, N. S. (2014). Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings. Journal of Physical Chemistry C, 118(34), 19618-19624. https://doi.org/10.1021/jp506133y

Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings. / McDowell, Matthew T.; Lichterman, Michael F.; Spurgeon, Joshua M.; Hu, Shu; Sharp, Ian D.; Brunschwig, Bruce S.; Lewis, Nathan S.

In: Journal of Physical Chemistry C, Vol. 118, No. 34, 2014, p. 19618-19624.

Research output: Contribution to journalArticle

McDowell, MT, Lichterman, MF, Spurgeon, JM, Hu, S, Sharp, ID, Brunschwig, BS & Lewis, NS 2014, 'Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings', Journal of Physical Chemistry C, vol. 118, no. 34, pp. 19618-19624. https://doi.org/10.1021/jp506133y
McDowell, Matthew T. ; Lichterman, Michael F. ; Spurgeon, Joshua M. ; Hu, Shu ; Sharp, Ian D. ; Brunschwig, Bruce S. ; Lewis, Nathan S. / Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 34. pp. 19618-19624.
@article{afd5ad0205664a308186adcbfaacee56,
title = "Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings",
abstract = "Ultrathin dual layers of TiO2 and Ni have been used to stabilize polycrystalline BiVO4 photoanodes against photocorrosion in an aqueous alkaline (pH = 13) electrolyte. Conformal, amorphous TiO2 layers were deposited on BiVO4 thin films by atomic-layer deposition, with Ni deposited onto the TiO2 by sputtering. Under simulated air mass 1.5 illumination, the dual-layer coating extended the lifetime of the BiVO4 photoanodes during photoelectrochemical water oxidation from minutes, for bare BiVO4, to hours, for the modified electrodes. X-ray photoelectron spectroscopy showed that these layers imparted chemical stability to the semiconductor/electrolyte interface. Transmission electron microscopy revealed the structure and morphology of the polycrystalline BiVO4 film as well as of the thin coating layers. This work demonstrates that protection schemes based on ultrathin corrosion-resistant overlayers can be applied beneficially to polycrystalline photoanode materials under conditions relevant to efficient solar-driven water-splitting systems.",
author = "McDowell, {Matthew T.} and Lichterman, {Michael F.} and Spurgeon, {Joshua M.} and Shu Hu and Sharp, {Ian D.} and Brunschwig, {Bruce S.} and Lewis, {Nathan S}",
year = "2014",
doi = "10.1021/jp506133y",
language = "English",
volume = "118",
pages = "19618--19624",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "34",

}

TY - JOUR

T1 - Improved stability of polycrystalline bismuth vanadate photoanodes by use of dual-layer thin TiO2/Ni coatings

AU - McDowell, Matthew T.

AU - Lichterman, Michael F.

AU - Spurgeon, Joshua M.

AU - Hu, Shu

AU - Sharp, Ian D.

AU - Brunschwig, Bruce S.

AU - Lewis, Nathan S

PY - 2014

Y1 - 2014

N2 - Ultrathin dual layers of TiO2 and Ni have been used to stabilize polycrystalline BiVO4 photoanodes against photocorrosion in an aqueous alkaline (pH = 13) electrolyte. Conformal, amorphous TiO2 layers were deposited on BiVO4 thin films by atomic-layer deposition, with Ni deposited onto the TiO2 by sputtering. Under simulated air mass 1.5 illumination, the dual-layer coating extended the lifetime of the BiVO4 photoanodes during photoelectrochemical water oxidation from minutes, for bare BiVO4, to hours, for the modified electrodes. X-ray photoelectron spectroscopy showed that these layers imparted chemical stability to the semiconductor/electrolyte interface. Transmission electron microscopy revealed the structure and morphology of the polycrystalline BiVO4 film as well as of the thin coating layers. This work demonstrates that protection schemes based on ultrathin corrosion-resistant overlayers can be applied beneficially to polycrystalline photoanode materials under conditions relevant to efficient solar-driven water-splitting systems.

AB - Ultrathin dual layers of TiO2 and Ni have been used to stabilize polycrystalline BiVO4 photoanodes against photocorrosion in an aqueous alkaline (pH = 13) electrolyte. Conformal, amorphous TiO2 layers were deposited on BiVO4 thin films by atomic-layer deposition, with Ni deposited onto the TiO2 by sputtering. Under simulated air mass 1.5 illumination, the dual-layer coating extended the lifetime of the BiVO4 photoanodes during photoelectrochemical water oxidation from minutes, for bare BiVO4, to hours, for the modified electrodes. X-ray photoelectron spectroscopy showed that these layers imparted chemical stability to the semiconductor/electrolyte interface. Transmission electron microscopy revealed the structure and morphology of the polycrystalline BiVO4 film as well as of the thin coating layers. This work demonstrates that protection schemes based on ultrathin corrosion-resistant overlayers can be applied beneficially to polycrystalline photoanode materials under conditions relevant to efficient solar-driven water-splitting systems.

UR - http://www.scopus.com/inward/record.url?scp=84906861085&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84906861085&partnerID=8YFLogxK

U2 - 10.1021/jp506133y

DO - 10.1021/jp506133y

M3 - Article

VL - 118

SP - 19618

EP - 19624

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 34

ER -