Synthesis of size-controlled Bi particles by electrochemical deposition

Small sized bismuth particles are prepared by an electrochemical method using a triple voltage pulse technique. The bath composition and electrochemical parameters are optimized to yield monodisperse particles. The particles have been characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray analysis, X-ray photoelectron spectroscopy, UV-visible spectroscopy and X-ray diffraction technique. The particles, as deposited, are highly crystalline in nature and the particle size and shape get tuned depending on the conditions of deposition

Studies on electrodeposition of Fe–W alloys for fuel cell applications

Electrodeposition of Fe–W alloy has been carried out from acidic triammonium citrate (TAC) complex bath solution. The deposit is characterised by XRD, SEM, EDAX, XPS and polarization techniques. The alloys are amorphous and become partially crystalline on heat treatment. The composition (Fe/W) of elements in the coating and their oxidation states vary from the surface to the bulk of the material. The coatings exhibit as novel electrode material with low over voltage and good corrosion resistance for anodic oxidation of methanol in $H_2SO_4$ medium. The anodic peak current, a measure of oxidation reaction rate is considerably high on Fe–Walloy when compared to pure Fe and also the relative surface area of Fe by alloying it with W found to increase by 1200-fold