sc7b01799_si_001.pdf (2.14 MB)
Enhanced Photoelectrochemical Water Oxidation Performance of Fe2O3 Nanorods Array by S Doping
journal contribution
posted on 2017-08-09, 00:00 authored by Rong Zhang, Yiyu Fang, Tao Chen, Fengli Qu, Zhiang Liu, Gu Du, Abdullah M. Asiri, Tao Gao, Xuping SunAs
a promising candidate for photoelectrochemical (PEC) water oxidation,
the photoelectrochemical water splitting efficiency of hematite (Fe2O3) is limited by its low electron mobility. In
this work, we report a new strategy for great enhancement of PEC water
oxidation activity on Fe2O3. The S-doped Fe2O3 (S:Fe2O3) nanorods array
on a Ti plate shows a substantially increased photocurrent density
of 1.42 mA cm–2 at 1.23 V vs RHE in 1.0 M NaOH under
simulated sunlight irradiation (AM 1.5G, 100 mW cm–2), 2.45 times that of Fe2O3 counterpart (0.58
mA cm–2). Both density functional theory calculations
and experimental measurements verify that the superior activity is
contributed to the enhanced electron mobility after S doping. This
study offers an attractive photoanode in water-splitting devices for
solar hydrogen production application.