Kinetic model of oxidation of metal nanoparticles: Cabrera-Mott and Kirkendall effects
Journal article, 2019

The conventional Cabrera-Mott model for the formation of a thin (nm-sized) flat oxide film on the surface of a macroscopic metal crystal implies that the process is limited by the field-facilitated activated jumps of metal ions at the metal-oxide interface. Earlier, it was modified in order to describe oxidation of metal nanoparticles with the formation of the oxide shell around the close-packed metallic core. In reality, oxidation of metal nano particles is often accompanied by the appearance of a hollow in the metallic core (Kirkendall effect). Herein, the analytical treatment takes this effect into account. The numerical results obtained by integration of the corresponding equation show the specifics of the oxidation kinetics in this case.

Supported metal nanoparticles

Core

Diffusion

Oxidation

Models of surface kinetics

Hollow

Shell

Author

Vladimir Zhdanov

Chalmers, Physics, Biological Physics

Russian Academy of Sciences

Surface Science

0039-6028 (ISSN)

Vol. 684 24-27

Subject Categories

Inorganic Chemistry

Materials Chemistry

DOI

10.1016/j.susc.2018.12.006

More information

Latest update

8/18/2019