Photocurrent enhancement via trapping of photogenerated electrons of TiO2 particles

Michael D. Ward; Allen J. Bard

doi:10.1021/j100215a021

Photocurrent enhancement via trapping of photogenerated electrons of TiO₂ particles

Michael D. Ward, Allen J. Bard

Chemistry

Research output: Contribution to journal › Article

Abstract

The photocurrente derived from TiO₂ suspensions are enhanced when reducible species such as Cu²⁺ and Fe³⁺ are added to cells containing these suspensions. This process is proposed to occur via trapping of photogenerated electrons in the TiO₂ by these solution species, thereby reducing the extent of deleterious electron-hole recombination. The ability of platinum deposits on TiO₂ particles to participate in electron trapping and enhance photocurrent via formation of Pt-H species was demonstrated by electrochemical detection of adsorbed H on irradiated Pt/TiO₂.

Original language	English (US)
Pages (from-to)	3599-3605
Number of pages	7
Journal	Journal of physical chemistry
Volume	86
Issue number	18
DOIs	https://doi.org/10.1021/j100215a021
State	Published - Jan 1 1982

ASJC Scopus subject areas

Engineering(all)
Physical and Theoretical Chemistry

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10.1021/j100215a021

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Ward, M. D., & Bard, A. J. (1982). Photocurrent enhancement via trapping of photogenerated electrons of TiO₂ particles. Journal of physical chemistry, 86(18), 3599-3605. https://doi.org/10.1021/j100215a021

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abstract = "The photocurrente derived from TiO2 suspensions are enhanced when reducible species such as Cu2+ and Fe3+ are added to cells containing these suspensions. This process is proposed to occur via trapping of photogenerated electrons in the TiO2 by these solution species, thereby reducing the extent of deleterious electron-hole recombination. The ability of platinum deposits on TiO2 particles to participate in electron trapping and enhance photocurrent via formation of Pt-H species was demonstrated by electrochemical detection of adsorbed H on irradiated Pt/TiO2.",

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