Correlation of photocurrent-voltage curves with flat-band potential for stable photoelectrodes for the photoelectrolysis of water

Jeffrey M. Bolts; Mark S. Wrighton

doi:10.1021/j100565a004

Correlation of photocurrent-voltage curves with flat-band potential for stable photoelectrodes for the photoelectrolysis of water

Jeffrey M. Bolts
, Mark S. Wrighton

Department of Chemistry

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

315 Scopus citations

Abstract

Using the differential capacitance technique, the flat-band potential of n-type TiO₂, SnO₂, SrTiO₃, KTaO₃, and KTa_0.77Nb_0.23O₃ electrodes has been determined as a function of pH in aqueous electrolytes. Plots of flat-band potential vs. pH are linear in all cases and have a slope of ∼0.059 V/pH unit. The flat-band potential correlates nicely with the onset for photoanodic currents corresponding to O₂ evolution at the n-type semiconductor and H₂ at the dark Pt cathode. The ordering of flat-band potentials at a given pH is SrTiO₃ ∼ KTaO₃ ∼ KTa_0.77Nb_0.23O₃ > TiO₂ > SnO₂ (SnO₂ most positive vs. SCE).

Original language	English
Pages (from-to)	2641-2645
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	80
Issue number	24
DOIs	https://doi.org/10.1021/j100565a004
State	Published - 1976

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@article{e639a3a97535426cab9603964d3f3d36,

title = "Correlation of photocurrent-voltage curves with flat-band potential for stable photoelectrodes for the photoelectrolysis of water",

abstract = "Using the differential capacitance technique, the flat-band potential of n-type TiO2, SnO2, SrTiO3, KTaO3, and KTa0.77Nb0.23O3 electrodes has been determined as a function of pH in aqueous electrolytes. Plots of flat-band potential vs. pH are linear in all cases and have a slope of ∼0.059 V/pH unit. The flat-band potential correlates nicely with the onset for photoanodic currents corresponding to O2 evolution at the n-type semiconductor and H2 at the dark Pt cathode. The ordering of flat-band potentials at a given pH is SrTiO3 ∼ KTaO3 ∼ KTa0.77Nb0.23O3 > TiO2 > SnO2 (SnO2 most positive vs. SCE).",

author = "Bolts, \{Jeffrey M.\} and Wrighton, \{Mark S.\}",

year = "1976",

doi = "10.1021/j100565a004",

language = "English",

volume = "80",

pages = "2641--2645",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

number = "24",

}

TY - JOUR

T1 - Correlation of photocurrent-voltage curves with flat-band potential for stable photoelectrodes for the photoelectrolysis of water

AU - Bolts, Jeffrey M.

AU - Wrighton, Mark S.

PY - 1976

Y1 - 1976

N2 - Using the differential capacitance technique, the flat-band potential of n-type TiO2, SnO2, SrTiO3, KTaO3, and KTa0.77Nb0.23O3 electrodes has been determined as a function of pH in aqueous electrolytes. Plots of flat-band potential vs. pH are linear in all cases and have a slope of ∼0.059 V/pH unit. The flat-band potential correlates nicely with the onset for photoanodic currents corresponding to O2 evolution at the n-type semiconductor and H2 at the dark Pt cathode. The ordering of flat-band potentials at a given pH is SrTiO3 ∼ KTaO3 ∼ KTa0.77Nb0.23O3 > TiO2 > SnO2 (SnO2 most positive vs. SCE).

AB - Using the differential capacitance technique, the flat-band potential of n-type TiO2, SnO2, SrTiO3, KTaO3, and KTa0.77Nb0.23O3 electrodes has been determined as a function of pH in aqueous electrolytes. Plots of flat-band potential vs. pH are linear in all cases and have a slope of ∼0.059 V/pH unit. The flat-band potential correlates nicely with the onset for photoanodic currents corresponding to O2 evolution at the n-type semiconductor and H2 at the dark Pt cathode. The ordering of flat-band potentials at a given pH is SrTiO3 ∼ KTaO3 ∼ KTa0.77Nb0.23O3 > TiO2 > SnO2 (SnO2 most positive vs. SCE).

UR - https://www.scopus.com/pages/publications/0001059031

U2 - 10.1021/j100565a004

DO - 10.1021/j100565a004

M3 - Article

AN - SCOPUS:0001059031

SN - 0022-3654

VL - 80

SP - 2641

EP - 2645

JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 24

ER -

Correlation of photocurrent-voltage curves with flat-band potential for stable photoelectrodes for the photoelectrolysis of water

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