title: Antimony-doped tin oxide nanorods as a transparent conducting electrode for enhancing photoelectrochemical oxidation of water by hematite.
abstract: We report the growth of well-defined antimony-doped tin oxide (ATO) nanorods as a conductive scaffold to improve hematite's photoelectrochemical water oxidation performance. The hematite grown on ATO exhibits greatly improved performance for photoelectrochemical water oxidation compared to hematite grown on flat fluorine-doped tin oxide (FTO). The optimized photocurrent density of hematite on ATO is 0.67 mA/cm(2) (0.6 V vs Ag/AgCl), which is much larger than the photocurrent density of hematite on flat FTO (0.03 mA/cm(2)). Using H2O2 as a hole scavenger, it is shown that the ATO nanorods indeed act as a useful scaffold and enhanced the bulk charge separation efficiency of hematite from 2.5% to 18% at 0.4 V vs Ag/AgCl.
authors.affiliation: Departments of Chemical Engineering and Chemistry, Center for Electrochemistry, Texas Materials Institute, Center for Nano and Molecular Science, University of Texas at Austin , 1 University Station C0400, Austin, Texas 78712, United States.
authors.forename: Yiqing
authors.initials: Y
authors.lastname: Sun
authors.forename: William D
authors.initials: WD
authors.lastname: Chemelewski
authors.forename: Sean P
authors.initials: SP
authors.lastname: Berglund
authors.forename: Chun
authors.initials: C
authors.lastname: Li
authors.forename: Huichao
authors.initials: H
authors.lastname: He
authors.forename: Gaoquan
authors.initials: G
authors.lastname: Shi
authors.forename: C Buddie
authors.initials: CB
authors.lastname: Mullins