Nanosheet Electrodes for Water Splitting

  • Author:
  • Published: 15 March 2017
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Small/Wiley-VCH
thumbnail image: Nanosheet Electrodes for Water Splitting

Splitting water into hydrogen and oxygen is key to a possible hydrogen economy that could replace fossil fuels. However, the high overpotential and sluggish kinetics of the oxygen evolution reaction (OER) make it difficult to realize this process in an efficient way. Catalysts that lower this overpotential are therefore needed.

Wen-Hua Zhang, An-Wu Xu, University of Science and Technology of China, Hefei, and colleagues have developed a one-step process to create iron–nickel sulfide nanosheets (pictured) on FeNi alloy foils (Fe–Ni3S2/FeNi) which show high catalytic activity for the OER. The team used a solvothermal process to directly grow Fe-doped Ni3S2 nanosheets on the FeNi alloy foils by reacting them with sulfide ions. The foil acts as support and current collector, and the nanosheets anchored on its surface have a high surface area and a large number of active sites for catalysis.

The resulting free-standing electrodes were tested in a water-splitting setup, and the researchers found that the material has a high catalytic activity and good stability for the OER in alkaline media. The overpotential is comparatively low at 282 mV at 10 mA cm−2. The team attributes these properties to the Fe-doping, which induces a disordered state in the nickel sulfide structure that changes its electronic properties and improves electron transport and catalytic activity.


Article Views: 2430

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

If you would like to reuse any content, in print or online, from, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH