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.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry