Surface modifications electrodeposition

Yang, X.F., et al. 2002. Electrodeposition of polypyrrole on aluminum alloy. In Proceedings of the International Conference on Surface Modification Technologies, 15th, 119. Indianapolis, IN. 

Gurtner C, Wun AW, Sailor MJ (1999) Surface modification of porous silicon by electrochemical reduction of organo halides. Angew Chem Int Ed 38 1966-1968 Hamadache F, Duvail JL, Scheuren V, Piraux L, Poleunis C, Bertrand P, Belkaid MS (2002) Electrodeposition of Fe-Co alloys into nanoporous p-type silicon influence of the electrolyte composition. J Mater Res 17 1074-1084... 

Abstract To improve the corrosion resistance of magnesium (Mg) alloys, surface modification is applied in an attempt to produce a corrosion resistant barrier. In this chapter, a new method to deposit aluminum (Al) film on an Mg alloy surface is demonstrated. Electrodeposition of Al on AZ91D Mg alloy, using an acidic aluminum chloride-l-ethyl-3-methylimidazolium chloride ionic liquid (AICI3-EMIC), has been shown to be feasible. The existence of Al coating can cause a substantial increase in corrosion resistance, reducing the susceptibility of Mg alloy to aqueous corrosion. 

Fused-salt electroplating, which is commonly referred to as metal-liding, is a process for surface modification and surface hardening by electrodeposition fiom fused-salt electrolytes. Two unique aspects of this electrodeposition process are (1) elements that cannot be plated by conventional processes may plate by fused-salt electrodeposition and (2) if the deposition rate is controlled to match the diffusion rate of the... 

The chemically modified electrodes (CMEs) are those with chemically active species added to their matrixes (bulk modifications) or even immobilized on their surfaces (by electrodeposition, or physical interaction) in order to control their reactivity, stability and/or selectivity. These electrodes can be used in several applications, such as electroanalysis, electrocatalysis, photoelectrochemical experiments, biosensing, among others [9-13]. 

Abstract Electrodeposition is a weU-known conventional surface modification method to improve the surface characteristics, decorative and functional, of a wide variety of materials. Now, electrodeposition is emerging as an accepted versatile technique for the preparation of nanomaterials. Work done in this direction is discussed in this chapter. The basics of electrodeposition are introduced, then the electrodeposition of nanomaterials using special techniques for reducing grain size. Methods such as pulse and pulse reverse current deposition, template-assisted deposition and use of additives and grain refiners are explained with suitable examples. Deposition of nanostructured metals, alloys, metal matrix composites, multilayers and biocompatible materials reported in the literature are discussed. Finally, there is a discussion of the improved corrosion resistance of electrodeposited nanostructured materials, quoting results reported in Uterature. 

This chapter will carefully differentiate situations in which coordination of metal ions assists in the achievement of specific electrochemical aims from experiments designed to study the electrochemistry of coordination compounds. (For information on the latter topic, see, particularly, Chapters 8.1-8.3). Two major areas have been selected for consideration one almost classical, namely the electrodeposition of metals, the other of more recent origin, namely the modification of electrode surfaces. 

Additives have been routinely used in corrosion catalysis and electrodeposition (3,A),flelds In which metals Interface with electrolytic solutions. Studies In these areas are part of the field of modification of metal surfaces In order to change the rates of processes occurring at the surface. In recent years there has been a good deal of work on what Is known as chemical modifications of electrodes (. While these semipermanent modifications have Involved seme sophisticated Investigations, the additive field Is largely studied by a trial and error process. The work In our laboratories has been aimed at obtaining an understanding of the role of additives In these... 

In order to study the influence of the surface composition of the thin film electrode on IR features of CO adsorption, nm-Pt/GC and nm-Ru/GC electrodes were modified with Ru and Pt, respectively. Modifications to the Pt on the nm-Ru/GC surface and the Ru on the nm-Pt/GC surface were carried out by employing an electrodeposition method [48]. The nm-Pt/GC or nm-Ru/GC electrode was introduced into 0.1 M H2SO4 solution containing ImM Ru or Pt" ions, and the potential was cycled between —0.25 and 0.40 V at a scan rate of 50mV s. The quantity of Pt deposited on the nm-Ru/GC surface or Ru deposited on the nm-Pt/ GC surface was controlled by varying the number of potential cycles that initiated the deposition. 

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