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Homogeneous and Heterogeneous Nucleation in Electrocrystallization
Uppsala universitet, Humanistisk-samhällsvetenskapliga vetenskapsområdet, Historisk-filosofiska fakulteten, Filosofiska institutionen. (Theoretical Philosophy)
(engelsk)Inngår i: Electrochimica Acta, ISSN 0013-4686, E-ISSN 1873-3859Artikkel i tidsskrift (Fagfellevurdert) Submitted
Abstract [en]

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. 

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nucleation
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URN: urn:nbn:se:uu:diva-284238OAI: oai:DiVA.org:uu-284238DiVA, id: diva2:920069
Tilgjengelig fra: 2016-04-15 Laget: 2016-04-15 Sist oppdatert: 2017-11-30bibliografisk kontrollert

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