Electrochemical Investigation of the Energetics of Particulate Titanium Dioxide Photocatalysts. The Methyl Viologen-Acetate System

Michael D. Ward; James R. White; Allen J. Bard

doi:10.1021/ja00339a007

Electrochemical Investigation of the Energetics of Particulate Titanium Dioxide Photocatalysts. The Methyl Viologen-Acetate System

Michael D. Ward, James R. White, Allen J. Bard

Chemistry

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

Abstract

Addition of methyl viologen (MV²⁺) enhances the anodic currents observed for TiO₂ suspensions under illumination by trapping of photogenerated electrons with formation of MV⁺·. The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and E_redox of the MV²⁺/MV⁺· couple. The location of the Fermi level in the anatase powders was estimated as -0.05 V vs. NHE (pH 0) based on the observed variation of photocurrent with pH. The shift in the quasi-Fermi level with light intensity is also discussed.

Original language	English (US)
Pages (from-to)	27-31
Number of pages	5
Journal	Journal of the American Chemical Society
Volume	105
Issue number	1
DOIs	https://doi.org/10.1021/ja00339a007
State	Published - Jan 1983

ASJC Scopus subject areas

Catalysis
General Chemistry
Biochemistry
Colloid and Surface Chemistry

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title = "Electrochemical Investigation of the Energetics of Particulate Titanium Dioxide Photocatalysts. The Methyl Viologen-Acetate System",

abstract = "Addition of methyl viologen (MV2+) enhances the anodic currents observed for TiO2 suspensions under illumination by trapping of photogenerated electrons with formation of MV+·. The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and Eredox of the MV2+/MV+· couple. The location of the Fermi level in the anatase powders was estimated as -0.05 V vs. NHE (pH 0) based on the observed variation of photocurrent with pH. The shift in the quasi-Fermi level with light intensity is also discussed.",

author = "Ward, {Michael D.} and White, {James R.} and Bard, {Allen J.}",

year = "1983",

month = jan,

doi = "10.1021/ja00339a007",

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AU - White, James R.

AU - Bard, Allen J.

PY - 1983/1

Y1 - 1983/1

N2 - Addition of methyl viologen (MV2+) enhances the anodic currents observed for TiO2 suspensions under illumination by trapping of photogenerated electrons with formation of MV+·. The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and Eredox of the MV2+/MV+· couple. The location of the Fermi level in the anatase powders was estimated as -0.05 V vs. NHE (pH 0) based on the observed variation of photocurrent with pH. The shift in the quasi-Fermi level with light intensity is also discussed.

AB - Addition of methyl viologen (MV2+) enhances the anodic currents observed for TiO2 suspensions under illumination by trapping of photogenerated electrons with formation of MV+·. The magnitude of the photocurrent depends upon the relative location of the semiconductor Fermi level and Eredox of the MV2+/MV+· couple. The location of the Fermi level in the anatase powders was estimated as -0.05 V vs. NHE (pH 0) based on the observed variation of photocurrent with pH. The shift in the quasi-Fermi level with light intensity is also discussed.

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Electrochemical Investigation of the Energetics of Particulate Titanium Dioxide Photocatalysts. The Methyl Viologen-Acetate System

Abstract

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