title: A hematite photoanode with gradient structure shows an unprecedentedly low onset potential for photoelectrochemical water oxidation.
abstract: Ultra-high onset potential hinders the application of hematite for photoelectrochemical (PEC) water splitting. Herein, a hematite photoanode with an unprecedentedly low onset potential of 0.50 V vs. the reversible hydrogen electrode for PEC water oxidation is reported. The drastically reduced onset potential is mainly ascribed to the passivation of the hematite surface states and the gradient structure made by H2-O2 flame at high temperature.
authors.affiliation: State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian National Laboratory for Clean Energy, Dalian 116023, China. canli@dicp.ac.cn.
authors.forename: Jingfeng
authors.initials: J
authors.lastname: Han
authors.forename: Xu
authors.initials: X
authors.lastname: Zong
authors.forename: Zhiliang
authors.initials: Z
authors.lastname: Wang
authors.forename: Can
authors.initials: C
authors.lastname: Li