Bimetallic Catalysts with Important Defects

  • Author:
  • Published: 10 October 2015
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
  • Source / Publisher: Nature Communications/Nature Publishing Group
thumbnail image: Bimetallic Catalysts with Important Defects

Bimetallic core-shell catalysts, combining a core of one metal and a one-atom thick layer of another, can be more effective than either metal alone. However, rationally designing new catalysts of this class requires a better understanding of their mode of action.

Dionisios G. Vlachos and Wei Guo, University of Delaware, Newark, DE, USA, have used density functional theory calculations and Monte Carlo simulations to elucidate the mechanism of ammonia decomposition using nickel monolayers on a platinum (111) host surface. The results of the study indicate that a presumably "defective" patched distribution of nickel on the surface performed better as a catalyst than a "perfect" closed nickel surface.

The team explained this phenomenon by the characteristics of the active sites: patches on the surface provide both nickel terraces and edges, which show different catalytic activity. While the terraces catalyze N−H bond breaking, the edges of the nickel patches facilitate the formation of N2. The results provide new oppurtunities for catalyst design, and the researchers are planning to investigate both other bimetallic materials and different reactions.


Article Views: 1813

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, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

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