Issue 40, 2015

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 50Ɨ 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 cmāˆ’2 under 100 mW cmāˆ’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.

Graphical abstract: Corrosion resistant three-dimensional nanotextured silicon for water photo-oxidation

Supplementary files

Article information

Article type
Paper
Submitted
12 Jun 2015
Accepted
08 Sep 2015
First published
16 Sep 2015

Nanoscale, 2015,7, 16755-16762

Corrosion resistant three-dimensional nanotextured silicon for water photo-oxidation

R. Carter, S. Chatterjee, E. Gordon, K. Share, W. R. Erwin, A. P. Cohn, R. Bardhan and C. L. Pint, Nanoscale, 2015, 7, 16755 DOI: 10.1039/C5NR03897A

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