Strain affects CO oxidation on metallic nanoparticles non-linearly
Journal article, 2019

Adsorption and reaction energies on metal surfaces are known to depend sensitively on strain. How such effects influence catalytic reactions over nanoparticles is, however, largely unexplored. Here we investigate the effect of strain on the catalytic performance of CO oxidation over Pt nanoparticles using scaling relations kinetic Monte Carlo simulations. The catalytic activities are compared with the corresponding results for Pt(111). We find that a moderate expansive strain yields higher catalytic activities for both nanoparticles and extended surfaces. The strong kinetic couplings between different sites on nanoparticles makes the particles respond non-linearly to strain. This is in contrast with Pt(111), which shows a linear response to strain.
The present work demonstrates the possibilities with strain-engineering and highlights the limitation in extrapolating results from extended surfaces to nanoparticles.

Heterogeneous catalysis

Scaling relations

Nanoparticles

Density functional theory

Strain

Kinetic Monte Carlo

Author

Mikkel Jørgensen

Competence Centre for Catalysis (KCK)

Chalmers, Physics, Chemical Physics

Henrik Grönbeck

Competence Centre for Catalysis (KCK)

Chalmers, Physics, Chemical Physics

Topics in Catalysis

1022-5528 (ISSN) 1572-9028 (eISSN)

Subject Categories

Inorganic Chemistry

Other Chemistry Topics

Organic Chemistry

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Infrastructure

C3SE (Chalmers Centre for Computational Science and Engineering)

DOI

10.1007/s11244-019-01145-6

More information

Latest update

10/4/2019