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Towards an electroless deposition of gold on metallic substrates using ionic li...
Sá, A. I. Correia de; Eugénio, S.; Quaresma, S.; Rangel, C. M.; Vilar, RuiRecent research has suggested a number of applications for gold in fuel cells and related hydrogen fuel processing, which include coatings for light weight corrosion resistance bipolar plates and the incorporation of gold as catalyst to provide improvements in electrode conductivity, among others. This paper reports on the electroless deposition of gold on copper substrates from a HAuCl4.3H2O solution in 1-buty...
Towards an electroless deposition of gold on metallic substrates using ionic li...
Sá, A. I. Correia de; Quaresma, S.; Eugénio, S.; Rangel, C. M.; Vilar, RuiRecent research has suggested a number of applications for gold in fuel cells and related hydrogen fuel processing, which include light weight corrosion resistance bipolar plates and the incorporation of gold as catalyst to provide improvements in electrode conductivity, among others. This paper reports on the electroless deposition of gold on copper substrates from a HAuCl4.3H2O solution in 1-butyl-1- methylpy...
Electrodeposition of black chromium from CR(III) ionic liquid solution
Eugénio, S.; Rangel, C. M.; Vilar, RuiBlack chromium is an important coating material used in solar thermal systems as a spectrally selective surface. This coating is usually obtained by electrodeposition from sulphate free chromium (VI) aqueous solutions which represent a health and environmental hazard due to the presence of Cr(VI), a known toxic and carcinogenic agent. Recent developments in green chemistry have shown that ionic liquids can be u...
Electrodeposition of black chromium thin films from trivalent chromium-ionic li...
Eugénio, S.; Vilar, Rui; Rangel, C. M.; Baskaran, I.In the present study, black chromium thin films were electrodeposited from a solution of 1-butyl-3- methylimidazolium tetrafluoroborate ([BMIm][BF4] ionic liquid containing trivalent chromium (Cr(III)). Homogeneous and well adherent coatings have been obtained on nickel, copper and stainless steel substrates. The nucleation and growth of the films were investigated by cyclic voltammetry and current-density/time...
Niobium and chromium rich coatings tailored by laser alloying: XRD analysis at ...
Costa,Adilson Rodrigues da; Craievich,Aldo; Vilar,RuiLaser treatment technologies have been widely used to modify superficial layers of different materials. In this work we prepare Nb and Cr rich coatings according to laser alloying technique using cast iron as substrate material. Nb and Cr are intensive used in order to overcome challenges like good chemical and mechanical performance at high temperatures. Following laser alloying the surface-modified samples we...
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