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Title: Modeling the migration of platinum nanoparticles on surfaces using a kinetic Monte Carlo approach

Journal Article · · Journal of Physical Chemistry. C
ORCiD logo [1];  [2];  [3];  [3];  [3];  [3]; ORCiD logo [4]
  1. Stanford Univ., Stanford, CA (United States)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States); Institute of Catalysis Research and Technology (IKFT), Eggenstein-Leopoldshafen (Germany)
  3. BASF SE, Ludwigshafen (Germany)
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States)

We propose a kinetic Monte Carlo (kMC) model for simulating the movement of platinum particles on supports, based on atom-by-atom diffusion on the surface of the particle. The proposed model was able to reproduce equilibrium cluster shapes predicted using Wulff-construction. The diffusivity of platinum particles was simulated both purely based on random motion and assisted using an external field that causes a drift velocity. The overall particle diffusivity increases with temperature; however, the extracted activation barrier appears to be temperature independent. Additionally, this barrier was found to increase with particle size, as well as, with the adhesion between the particle and the support.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1349280
Journal Information:
Journal of Physical Chemistry. C, Vol. 121, Issue 8; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 24 works
Citation information provided by
Web of Science

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Cited By (4)

Toward rational nanoparticle synthesis: predicting surface intermixing in bimetallic alloy nanocatalysts journal January 2017
A coordination-based model for transition metal alloy nanoparticles journal January 2019
Communication: Diverse nanoscale cluster dynamics: Diffusion of 2D epitaxial clusters journal November 2017
Complex oscillatory decrease with size in diffusivity of {100}-epitaxially supported 3D fcc metal nanoclusters journal January 2019

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