Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Electrocatalytic oxygen reduction (ORR) has become the focus of considerable attention due of its slow kinetics and the need for better electrocatalysts for fuel cell cathodes in the recent years. In recent publications some results have been reported on the electrocatalytic activity of carbon supported polypyrrole (Ppy), polyaniline (Pani) and poly(3- methylthiophene) (P3MT), modified with cobalt or nickel salts. For these conductive polymer samples,Read more
The development of aluminum bronzes has progressed to complex alloys with the addition of iron, nickel, manganese, and other elements due to their resistance in nonoxidizing mineral acids, in organic acids like acetic, citric, lactic and in some chloride containing solution. The addition of about 4% nickel in aluminum bronzes with about 9% Al increase the dealloying resistance. The main task of this work was to compare electrochemical and corrosionRead more
Cyclic voltammetry was used in order to deposit conducting polytyramine (PTy) on graphite substrates. In acidic media, ca. 40 deposition cycles resulted in the formation of stable polymer films with reasonably good resistivity. Electrochemical deposition of platinum on the PTy-covered graphite substrate allowed us to obtain a composite material that exhibits, for a platinum loading of 0.34 mg cm−2, a specific electrochemically active surface areaRead more
The paper is focused on preparation and microstructure and electrochemical characterization of carbon-TiO2/Pt catalyst used as electrode in fuel cells applications. The platinum deposition was comparatively studied on graphitized carbon substrate and carbon substrate covered with titanium oxide. A strong influence on the platinum deposition, depending of the TiO2 presence, was found. The platinum nanoparticles about 5 nm in size are dispersed inRead more