Defects Activate Inert Hexagonal Boron Nitride

  • Author: ChemistryViews
  • Published: 25 November 2021
  • Copyright: Wiley-VCH GmbH
thumbnail image: Defects Activate Inert Hexagonal Boron Nitride

Hexagonal boron nitride (hBN, pictured) is structurally similar to graphite. It has strong covalent bonds and is chemically fairly inert. This makes it difficult to functionalize the material. Introducing defects into the structure of hBN could help to overcome this difficulty. However, this usually requires energy-intensive methods using plasma or time-consuming ball-milling.


Jose L. Mendoza-Cortes, Michigan State University, East Lansing, USA, Mauricio Terrones, The Pennsylvania State University, University Park, USA, and Shinshu University, Nagano, Japan, and colleagues have used a scalable ball-milling process in a cryogenic environment, or "cryomilling", using liquid nitrogen to selectively and efficiently introduce defects in hBN. In this approach, the milling time can be reduced down to minutes, depending on the desired level of defects. The team used X-ray diffraction to monitor the structural changes during cryomilling.


The researchers found that cryomilling not only reduced the particle size, but also introduced defects such as hydroxyl groups and free radicals into the structure of hBN. The free-radical sites can react with metal cations to form single metal atoms or nanoclusters (e.g., with Pt, Au, Ag, Fe, or Cu) on the surface of the boron nitride. The resulting materials could be useful for catalysis. The team used boron nitride functionalized with bi-metallic AgPt nanoclusters as a catalyst for the hydrogen evolution reaction.


 

 

Article Views: 618

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 ChemistryViews.org, 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