Jump to main content
Jump to site search


Shape Control in Concave Metal Nanoparticles by Etching

Abstract

The shape control of nanoparticles constitutes one of the main challenges in today’s nanotechnology. The synthetic procedures are based on trial-and-error methods and are difficult to rationalize as many ingredients are typically used. For instance, concave nanoparticles exhibiting high-index facets can be obtained for Pt with different HCl treatments. These structures present exceptional capacities when employed as catalysts in electrochemical processes, as they maximize the activity per mass unit of the expensive material. Here we show how atomistic simulations based on Density Functional Theory that take into account the environment can predict the morphology for the nanostructures and how it is even possible to address the appearance of concave structures. To describe the control by etching we have reformulated the Wulff construction through the use of a geometric model that leads to concave polyhedra which have a larger surface-to-volume ratio as compared to that for nanocubes. Such an increase makes this sort of nanoparticles excellent candidates to improve electrocatalytic performance.

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Jun 2017, accepted on 30 Jul 2017 and first published on 01 Aug 2017


Article type: Paper
DOI: 10.1039/C7NR03889E
Citation: Nanoscale, 2017, Accepted Manuscript
  •   Request permissions

    Shape Control in Concave Metal Nanoparticles by Etching

    Q. Li, M. Rellan-Pineiro, N. Almora-Barrios, M. Garcia-Rates, I. Remediakis and N. Lopez, Nanoscale, 2017, Accepted Manuscript , DOI: 10.1039/C7NR03889E

Search articles by author

Spotlight

Advertisements