title: CoSe2Embedded in C3N4: An Efficient Photocathode for Photoelectrochemical Water Splitting.
abstract: An efficient H2evolution catalyst is developed by grafting CoSe2nanorods into C3N4nanosheets. The as-obtained C3N4-CoSe2heterostructure can show excellent performance in H2evolution with outstanding durability. To generate phatocathode for photoelectrochemical water splitting CoSe2grafted in C3N4was decorated on the top of p-Si microwires (MWs). p-Si/C3N4-CoSe2heterostructure can work as an efficient photocathode material for solar H2production in PEC water splitting. In 0.5 M H2SO4, p-Si/C3N4-CoSe2can afford photocurrent density -4.89 mA/cm2at "0" V vs RHE and it can efficiently work for 3.5 h under visible light. Superior activity of C3N4-CoSe2compared to CoSe2toward H2evolution is explained with the help of impedance spectroscopy.
authors.affiliation: Department of Chemistry, National Taiwan University , Taipei 106, Taiwan.
authors.forename: Mrinmoyee
authors.initials: M
authors.lastname: Basu
authors.affiliation: Department of Physics, National Taiwan Normal University , Taipei 116, Taiwan.
authors.forename: Zhi-Wei
authors.initials: ZW
authors.lastname: Zhang
authors.affiliation: Department of Chemistry, National Taiwan University , Taipei 106, Taiwan.
authors.forename: Chih-Jung
authors.initials: CJ
authors.lastname: Chen
authors.affiliation: Department of Chemistry, National Taiwan University , Taipei 106, Taiwan.
authors.forename: Tzu-Hsiang
authors.initials: TH
authors.lastname: Lu
authors.affiliation: Department of Physics, National Taiwan Normal University , Taipei 116, Taiwan.
authors.forename: Shu-Fen
authors.initials: SF
authors.lastname: Hu
authors.affiliation: Department of Chemistry, National Taiwan University , Taipei 106, Taiwan.|Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology, National Taipei University of Technology , Taipei 106, Taiwan.
authors.forename: Ru-Shi
authors.initials: RS
authors.lastname: Liu
keywords: C3N4−CoSe2; heterostructure; hydrogen evolution; nanorod; photocathode