Hydrogen Fuel From Seawater

  • Author: ChemistryViews.org
  • Published: 06 October 2017
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Energy & Environmental Science/RSC
  • Associated Societies: Royal Society of Chemistry (RSC), UK
thumbnail image: Hydrogen Fuel From Seawater

Yang Yang, University of Central Florida (UCF), Orlando, FL, USA, and colleagues have designed a hybrid nanomaterial that harnesses solar energy to generate hydrogen from seawater. The photocatalyst harvests a broad spectrum of light, is durable enough to handle the biomass of seawater and withstand the corrosive salt.

To produce this nonmetal plasmonic MoS2@TiO2 heterostructure for highly efficient photocatalytic H2 generation, tiny nanocavities were chemically etched onto the surface of an ultrathin film of titanium dioxide. The nanocavity indentations were coated with nanoflakes of molybdenum disulfide. By controlling the density of sulfur vacancy within the nanoflakes a broad spectral response – ranging from ultraviolet-visible (UV-Vis) to near-infrared (NIR) wavelengths – can be used to produce energy. This makes the material at least twice as efficient as current photocatalysts. A high H2 yield rate of 181 μmol h–1cm–2 (equal to 580 mmol h–1g–1 based on the loading mass of MoS2) was achieved using a low catalyst loading mass.

The study demonstrates that the photocatalytic activities of nonmetal, earth-abundant materials can be enhanced with plasmonic effects. Currently, the researchers are working to scale up the relatively easy and inexpensive catalyst production.


 

Article Views: 819

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission. more


CONNECT:

ChemistryViews.org on Facebook

ChemistryViews.org on Twitter ChemistryViews.org on YouTube ChemistryViews.org on LinkedIn Sign up for our free newsletter


A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH