Jump to main content
Jump to site search

Issue 5, 2015
Previous Article Next Article

Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays

Author affiliations

Abstract

Free-standing, membrane-embedded, Si microwire arrays have been used to affect the solar-driven, unassisted splitting of HI into H2 and I3. The Si microwire arrays were grown by a chemical-vapor-deposition vapor–liquid–solid growth process using Cu growth catalysts, with a radial n+p junction then formed on each microwire. A Nafion proton-exchange membrane was introduced between the microwires and Pt electrocatalysts were then photoelectrochemically deposited on the microwires. The composite Si/Pt–Nafion membrane was mechanically removed from the growth substrate, and Pt electrocatalysts were then also deposited on the back side of the structure. The resulting membrane-bound Si microwire arrays spontaneously split concentrated HI into H2(g) and I3 under 1 Sun of simulated solar illumination. The reaction products (i.e. H2 and I3) were confirmed by mass spectrometry and ultraviolet–visible electronic absorption spectroscopy.

Graphical abstract: Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays

Back to tab navigation

Supplementary files

Publication details

The article was received on 22 Jan 2015, accepted on 01 Apr 2015 and first published on 01 Apr 2015


Article type: Paper
DOI: 10.1039/C5EE00227C
Citation: Energy Environ. Sci., 2015,8, 1484-1492
  • Open access: Creative Commons BY-NC license
  •   Request permissions

    Unassisted solar-driven photoelectrosynthetic HI splitting using membrane-embedded Si microwire arrays

    S. Ardo, S. H. Park, E. L. Warren and N. S. Lewis, Energy Environ. Sci., 2015, 8, 1484
    DOI: 10.1039/C5EE00227C

    This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material and it is not used for commercial purposes.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements