Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Issue 43, 2018
Previous Article Next Article

Correlating anisotropy and disorder with the surface structure of platinum nanoparticles

Author affiliations


Due to the competition between numerous physicochemical variables during formation and processing, platinum nanocatalysts typically contain a mixture of shapes, distributions of sizes, and a considerable degree of surface imperfection. Structural imperfection and sample polydispersivity are inevitable at scale, but accepting bulk and surface diversity as legitimate design features provides new opportunities for nanoparticle design. In recent years disorder and anisotropy have been embraced as useful design parameters but predicting the impact of uncontrollable imperfection a priori is challenging. In the present work we have created an ensemble of uniquely imperfect nanoparticles extracted from classical molecular dynamics trajectories and applied statistical filters to restrict the ensemble in ways that reflect common industrial design principles. We find that targeting different sizes and size distributions may be an effective way of promoting or suppressing internal disorder or crystallinity (as required), but the degree of anisotropy of the particle as a whole has a greater impact on the population of different types of surface ordering and active sites. These results indicate that tuning of disordered and anisotropic Pt nanoparticles is possible, but it is not as straightforward as geometrically ideal nanoparticles with a high degree of crystallinity. It is unlikely that a synthesis strategy could eliminate this diversity entirely, or ensure this type of structural complexity does not develop post-synthesis under operational conditions, but it may be possible to bias the formation of specific bulk structures and the surface anisotropy.

Graphical abstract: Correlating anisotropy and disorder with the surface structure of platinum nanoparticles

Back to tab navigation

Supplementary files

Publication details

The article was received on 10 Aug 2018, accepted on 05 Oct 2018 and first published on 30 Oct 2018

Article type: Paper
DOI: 10.1039/C8NR06450D
Nanoscale, 2018,10, 20393-20404

  •   Request permissions

    Correlating anisotropy and disorder with the surface structure of platinum nanoparticles

    B. Sun, H. Barron, B. Wells, G. Opletal and A. S. Barnard, Nanoscale, 2018, 10, 20393
    DOI: 10.1039/C8NR06450D

Search articles by author