Metal-Free Electrocatalyst

  • ChemPubSoc Europe Logo
  • Author: Andrea Stomps
  • Published Date: 21 November 2016
  • Source / Publisher: Chemistry – A European Journal/Wiley-VCH
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
thumbnail image: Metal-Free Electrocatalyst

Related Societies

Electrocatalysts for oxygen reduction and evolution reactions (ORR and OER) are essential for renewable energy technologies such as fuel cells or water splitting. The development of metal-free electrocatalysts to replace expensive precious-metal-based catalysts has generated much interest.


Bhalchandra Kakade and colleagues, SRM University, India, have developed a simple and cost-effective strategy to prepare a bifunctional electrocatalyst consisting of carbon nanotubes and boron nitride through a one-step hydrothermal method followed by annealing at 750 °C. The team studied the material in terms of morphology using transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). They also evaluated the catalytic performance using cyclic voltammetry and rotating ring-disk electrode measurements and compared it to the state-of-the-art precious-metal-based electrocatalyst, Pt/C.


This metal-free nanocomposite shows excellent activity towards both ORR and OER, most likely owing to a synergistic effect between the two components and the formation of ideal sites for oxygen adsorption with subsequent reduction. Additionally, the researchers were able to eliminate cross-over effects from undesirable methanol oxidation occurring in direct methanol fuel cells that would result in loss of electrocatalytic activity. The catalyst shows a high resistance against CO poisoning, which remains a considerable challenge for metal-based catalysts.


 

Article Views: 1690

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