Co3O4 for Water Electrolysis

  • Author: Angewandte Chemie International Edition
  • Published Date: 17 January 2017
  • Source / Publisher: Angewandte Chemie International Edition/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Co<sub>3</sub>O<sub>4</sub> for Water Electrolysis

Electrochemical water splitting is important for renewable energy technologies, such as hydrogen fuel production and rechargeable metal-air batteries. A variety of earth-abundant and cost-effective electrocatalysts have been developed as catalysts for water electrolysis. However, further improvement of the electrochemical performance remains challenging.

Shi-Zhang Qiao, University of Adelaide, Australia, and colleagues have developed an electrochemical self-templating strategy to prepare hollow Co3O4 microtube arrays. CoHPO4 microrods with relatively low stability were first grown on a nickel foam. A subsequent potentiostat treatment in alkaline media resulted in the transformation of protonated CoHPO4 microrods into hollow Co3O4 microtubes with hierarchical porosity and high surface area.

The resulting self-supported catalysts can be directly used in catalyzing oxygen and hydrogen evolution. In overall water electrolysis, the catalyst provides a current density of 10 mA m–2 at 400 mV overpotential, along with a high durability. The microtubes surpass the performance of the precious-metal catalysts IrO2/C and Pt/C.


Article Views: 2734

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 permisson 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