| Abstract [eng] |
The purpose of this work was to form AuMn/Ti, Au/Ti and Mn/Ti catalysts, to characterize them and evaluate their possibilities to be used as anode materials in low-temperature hydrazine and sodium borohydride fuel cells. Gold and manganese particles were deposited on titanium plates using an electrochemical metal deposition method. The surface morphology, internal structure and chemical composition of the obtained catalysts were analyzed using SEM, XRD, XPS and ICP-OES. Electrocatalytic activity for oxygen reduction was evaluated by recording linear sweep voltammograms. The oxidation of hydrazine and sodium borohydride was evaluated by cyclic voltammetry and chronoamperometry. During the work, AuMn/Ti and Au/Ti catalysts were formed, in which the size of deposited Au particles is from 170 to 500 nm, and Mn particles in AuMn/Ti and Mn/Ti catalysts are ~1,5 – 3,0 μm in size. Modification of the Au/Ti catalyst with Mn particles significantly increases its activity for the oxidation reactions of hydrazine and sodium borohydride compared to the activity of the Au/Ti and Mn/Ti catalysts. |
