Electrochemical selective dissolution of Pd- based amorphous alloys

Electrochemical selective dissolution of Pd- based amorphous alloys

Oral presentation

Lazar Draganov Kardozo, Lyuben Mihaylov, Tony Spassov
Faculty of Chemistry and Pharmacy, University of Sofia “St. Kliment Ohridski”, Sofia

Pd43Ni10Cu27Si20 amorphous alloys were synthesized by rapid quenching from the melt, using a planar flow technique. Their thermal stability and crystallization behavior were studied by differential scanning calorimetry and x-ray diffraction. The selective dissolution of the alloy was studied by potential step and cyclic polarization techniques in water solution of KCl and HNO3 (pH=1) at room temperature. The electrocatalytic activity and the kinetic parameters of the HER were evaluated by cyclic voltammetry techniques in 6M KOH at room temperature. The electrocatalytic activity for HER of selectively dissolved Pd43Ni10Cu27Si20 was found to exceed noticeably that of the as-quenched alloy.