title: Corrosion resistant three-dimensional nanotextured silicon for water photo-oxidation.
abstract: We demonstrate the ability to chemically transform bulk silicon into a nanotextured surface that exhibits excellent electrochemical stability in aqueous conditions for water photo-oxidation. Conformal defective graphene coatings on nanotextured silicon formed by thermal treatment enable over 50× corrosion resistance in aqueous electrolytes based upon Tafel analysis and impedance spectroscopy. This enables nanotextured silicon as an effective oxygen-evolution photoanode for water splitting with saturation current density measured near 35 mA cm(-2) under 100 mW cm(-2) (1 sun) illumination. Our approach builds upon simple and scalable processing techniques with silicon to develop corrosion resistant electrodes that can benefit a broad range of catalytic and photocatalytic applications.
authors.affiliation: Department of Mechanical Engineering, Vanderbilt University, Nashville, TN 37235, USA. cary.l.pint@vanderbilt.edu.
authors.forename: Rachel
authors.initials: R
authors.lastname: Carter
authors.forename: Shahana
authors.initials: S
authors.lastname: Chatterjee
authors.forename: Evan
authors.initials: E
authors.lastname: Gordon
authors.forename: Keith
authors.initials: K
authors.lastname: Share
authors.forename: William R
authors.initials: WR
authors.lastname: Erwin
authors.forename: Adam P
authors.initials: AP
authors.lastname: Cohn
authors.forename: Rizia
authors.initials: R
authors.lastname: Bardhan
authors.forename: Cary L
authors.initials: CL
authors.lastname: Pint