Homogeneous and Heterogeneous Nucleation in Electrocrystallization
(English)In: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859Article in journal (Refereed) Submitted
The belief amongst most electrochemists that the appropriate models, representing “homogeneous” and “heterogeneous” nucleation in the context of electrocrystallization, are spherical and spherical-cap shapes, respectively, is challenged. A proper foundation for modelling heterogeneous nucleation is introduced. The free energy required for the formation of a nucleus within an indent is derived and compared with that required for the formation of a nucleus onto a flat surface of an electrode. It is shown for the first time, using the classical theory of nucleation, that a much smaller free energy is required for nucleating within an indent on the surface of an electrode than nucleating onto a flat electrode surface. The applicability of the model, with the corresponding equations, to nucleation in the context of electrocrystallization is established.
Place, publisher, year, edition, pages
Research subject Chemistry with specialization in Physical Chemistry
IdentifiersURN: urn:nbn:se:uu:diva-284238OAI: oai:DiVA.org:uu-284238DiVA: diva2:920069