Silicon and tungsten oxide nanostructures for water splitting

Karla R Reyes Gil, Joshua M. Spurgeon, Nathan S Lewis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Inorganic semiconductors are promising materials for driving photoelectrochemical water-splitting reactions. However, there is not a single semiconductor material that can sustain the unassisted splitting of water into H2 and O2. Instead, we are developing a three part cell design where individual catalysts for water reduction and oxidation will be attached to the ends of a membrane. The job of splitting water is therefore divided into separate reduction and oxidation reactions, and each catalyst can be optimized independently for a single reaction. Silicon might be suitable to drive the water reduction. Inexpensive highly ordered Si wire arrays were grown on a single crystal wafer and transferred into a transparent, flexible polymer matrix. In this array, light would be absorbed along the longer axial dimension while the resulting electrons or holes would be collected along the much shorter radial dimension in a massively parallel array resembling carpet fibers on a microscale, hence the term "solar carpet". Tungsten oxide is a good candidate to drive the water oxidation. Self-organized porous tungsten oxide was successfully synthesized on the tungsten foil by anodization. This sponge-like structure absorbs light efficiently due to its high surface area; hence we called it "solar sponge".

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume7408
DOIs
Publication statusPublished - 2009
EventSolar Hydrogen and Nanotechnology IV - San Diego, CA, United States
Duration: Aug 3 2009Aug 6 2009

Other

OtherSolar Hydrogen and Nanotechnology IV
CountryUnited States
CitySan Diego, CA
Period8/3/098/6/09

Fingerprint

water splitting
tungsten oxides
Silicon
Nanostructures
silicon oxides
Oxides
Tungsten
Water
Oxidation
water
oxidation
Catalyst
catalysts
Semiconductors
microbalances
Semiconductor materials
foils
tungsten
Catalysts
wafers

Keywords

  • Hydrogen production
  • Membrane
  • Semiconductor
  • Silicon
  • Solar cell
  • Tungsten oxide
  • Water splitting

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Gil, K. R. R., Spurgeon, J. M., & Lewis, N. S. (2009). Silicon and tungsten oxide nanostructures for water splitting. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7408). [74080S] https://doi.org/10.1117/12.825545

Silicon and tungsten oxide nanostructures for water splitting. / Gil, Karla R Reyes; Spurgeon, Joshua M.; Lewis, Nathan S.

Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7408 2009. 74080S.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gil, KRR, Spurgeon, JM & Lewis, NS 2009, Silicon and tungsten oxide nanostructures for water splitting. in Proceedings of SPIE - The International Society for Optical Engineering. vol. 7408, 74080S, Solar Hydrogen and Nanotechnology IV, San Diego, CA, United States, 8/3/09. https://doi.org/10.1117/12.825545
Gil KRR, Spurgeon JM, Lewis NS. Silicon and tungsten oxide nanostructures for water splitting. In Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7408. 2009. 74080S https://doi.org/10.1117/12.825545
Gil, Karla R Reyes ; Spurgeon, Joshua M. ; Lewis, Nathan S. / Silicon and tungsten oxide nanostructures for water splitting. Proceedings of SPIE - The International Society for Optical Engineering. Vol. 7408 2009.
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