Interface physicochemical processes controlling sulphate anion incorporation in porous anodic alumina and their dependence on the thermodynamic and transport properties of cations

Patermarakis, G; Chandrinos, J; Moussoutzanis, K

dc.contributor.author	Patermarakis, G	en
dc.contributor.author	Chandrinos, J	en
dc.contributor.author	Moussoutzanis, K	en
dc.date.accessioned	2014-03-01T01:16:39Z
dc.date.available	2014-03-01T01:16:39Z
dc.date.issued	2001	en
dc.identifier.issn	0022-0728	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14150
dc.subject	Cation mobility effect	en
dc.subject	Interface processes	en
dc.subject	Porous anodic alumina	en
dc.subject	Sulphate anion incorporation	en
dc.subject.classification	Chemistry, Analytical	en
dc.subject.classification	Electrochemistry	en
dc.subject.other	Anodic oxidation	en
dc.subject.other	Composition effects	en
dc.subject.other	Dissolution	en
dc.subject.other	Electric charge	en
dc.subject.other	Electrolytes	en
dc.subject.other	Enthalpy	en
dc.subject.other	Hydration	en
dc.subject.other	Lithium compounds	en
dc.subject.other	Negative ions	en
dc.subject.other	Phase interfaces	en
dc.subject.other	Porous materials	en
dc.subject.other	Positive ions	en
dc.subject.other	Sulfur compounds	en
dc.subject.other	Sulfuric acid	en
dc.subject.other	Thermodynamics	en
dc.subject.other	Transport properties	en
dc.subject.other	Chain mobility effect	en
dc.subject.other	Porous anodic alumina	en
dc.subject.other	Alumina	en
dc.title	Interface physicochemical processes controlling sulphate anion incorporation in porous anodic alumina and their dependence on the thermodynamic and transport properties of cations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0022-0728(01)00544-7	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0022-0728(01)00544-7	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	Aluminium was anodised in H2SO4, LiHSO4, NaHSO4, KHSO4, Mg(HSO4)(2) and Al(HSO4)(3) electrolytes. The kinetics of growth of porous anodic alumina films and of the pore wall oxide dissolution during anodisation was studied. Based on the derived kinetic parameters, suitable physicochemical processes in the barrier layer I electrolyte interface controlling the anion incorporation in the barrier laver were suggested and relevant models were formulated. According to these processes Al3+ and H+ ions are rejected from the pore base surface in the attached double layer, where Al3+ ions are solvated, and are transferred to the pore filling solution. The strongly different mobilities of Al3+ and H+ and the necessary space negative charge density distribution in the double layer result in similar concentration distributions of Al3+ and anions inside it, which differ strongly from that of H+. These Al3+ and anion concentrations increase with decreasing mobility of the main cations in the solution which depends on their hydration enthalpy and transport mechanism. The concentration of incorporated anions inside both a thin surface layer of the barrier layer and the double layer vary similarly. For identical surface density and base diameter of pores the decrease of the above mobility reinforces anion incorporation. (C) 2001 Elsevier Science B.V. All rights reserved.	en
heal.publisher	ELSEVIER SCIENCE SA	en
heal.journalName	Journal of Electroanalytical Chemistry	en
dc.identifier.doi	10.1016/S0022-0728(01)00544-7	en
dc.identifier.isi	ISI:000170755600008	en
dc.identifier.volume	510	en
dc.identifier.issue	1-2	en
dc.identifier.spage	59	en
dc.identifier.epage	66	en