Size-Dependent Electrochemical Properties of Pure Metallic Nanoparticles

A generalized size-dependent thermodynamic model was derived to describe the electrochemical properties of nanoparticles, which takes into account the effects of size-dependent stress distributions in the surface shell and core of nanoparticles, based on the thermodynamic equilibrium theory. This mo...

Full description

Saved in:
Bibliographic Details
Published inJournal of physical chemistry. C Vol. 124; no. 5; pp. 3403 - 3409
Main Authors Ma, Hongxin, Gao, Panpan, Qian, Ping, Su, Yanjing
Format Journal Article
LanguageEnglish
Published American Chemical Society 06.02.2020
Online AccessGet full text

Cover

More Information
Summary:A generalized size-dependent thermodynamic model was derived to describe the electrochemical properties of nanoparticles, which takes into account the effects of size-dependent stress distributions in the surface shell and core of nanoparticles, based on the thermodynamic equilibrium theory. This model can be used to simultaneously analyze the nanoparticle size, stresses, electrochemical properties, and their coupling behaviors in thermodynamic equilibrium nanoparticles. Combined with the molecular dynamics simulations, the spherical nanoparticles of pure metals (Au, Pt, Ni, Cu, and Fe) were modeled as a core–shell structure. The thermodynamic analysis showed that the anodic current density decreased with decreasing nanoparticle radius, implying that the stability of nanoparticles was enhanced, which is qualitatively consistent with some experimental observations.
ISSN:1932-7447
1932-7455
DOI:10.1021/acs.jpcc.9b10962