What Makes a Good Photoanode?

  • ChemPubSoc Europe Logo
  • Author: ChemPlusChem
  • Published Date: 20 July 2016
  • Source / Publisher: ChemPlusChem/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: What Makes a Good Photoanode?

Related Societies

Photoelectrochemical water splitting is an elegant way to transform water into molecular oxygen and hydrogen with the help of sunlight. Water is an abundant resource and hydrogen can directly be used as carbon-free chemical fuel to power a combustion engine or a fuel cell. A major limitation of efficient water splitting lies in finding stable semiconductor photoanodes with suitable bandgaps.


Markus Niederberger, ETH Zurich, Switzerland, and colleagues processed commercially available tungsten oxide nanopowders into nanostructured films and tested them as photoanodes for photoelectrochemical water splitting. The team found that these photoanodes showed high photocurrent densities of up to 3.5 mA/cm at 1.23 V under simulated sunlight. However, further experiments indicated oxidation of the electrolyte rather than of water.


While the study proposes a scalable approach to the fabrication of photoanodes from commercially available WO3 powders, it also indicates that photocurrent density measurements alone are not sufficient to fully evaluate the performance of a photoanode material. These results should have an impact on the technological construction of future water-splitting devices.


 

Article Views: 1518

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