Diffusion-limited currents to nanoparticles of various shapes supported on an electrode; Spheres, hemispheres, and distorted spheres and hemispheres

Journal article

The finite difference method is used to simulate the current at a spherical nanoparticle sitting upon a planar electrode, assuming electrolysis occurs only at the nanoparticle surface. The accuracy of the simulation technique is confirmed by using the same approach to simulate a hemispherical electrode. Nanoparticles with the geometry of a distorted sphere or hemisphere are also considered. Equations are given for the corresponding masstransport-limiting current. For the spherical nanoparticle, this expression is ilim = -8.71nFZ)rs[A]bulk, where D is the diffusion coefficient, rs is the radius of the particle, [A]bulk is the bulk concentration of the electroactive species, and n is the number of electrons transferred. © 2007 American Chemical Society.

Authors: Streeter, I; Compton, R

• Publication status: Published
• Journal: JOURNAL OF PHYSICAL CHEMISTRY C
• Volume: 111
• Issue: 49
• Pages: 18049-18054
• Publication date: 2007-12-13
• DOI: 10.1021/jp076593i
• EISSN: 1932-7455
• ISSN: 1932-7447
• Language: English