Effects of different additives on bimetallic Au-Pt nanoparticles electrodeposited onto indium tin oxide electrodes |
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Authors: | Barbara Ballarin Massimo Gazzano |
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Affiliation: | a Dipartimento di Chimica Fisica ed Inorganica, Università di Bologna, V.le Risorgimento, 4, 40136-Bologna, Italy b INSTM, UdR Bologna, Italy c ISOF-CNR, V. Selmi, 40126-Bologna, Italy |
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Abstract: | Bimetallic Au-Pt nanoparticles (Au-PtNPs) have been synthesized using an electrochemical reduction approach. The effects of the addition of different additives in the electrodeposition bath namely KI, 1-nonanesulfonic acid sodium salt and Triton X-100 have been investigated. The structural characterization of the bimetallic nanoparticles has been carried out using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), UV-vis spectroscopy, X-ray diffraction (XRD) and cyclic voltammetry (CV). The Au-PtNPs prepared in the presence of KI and Triton X-100 characterized by a relatively narrow size distribution as well as a higher particle density and surface coverage whereas no changes in the morphology were observed. These results suggest a dependence of the size and distribution of the bimetallic nanoparticles from the type and concentration of the additives employed. |
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Keywords: | Bimetallic nanoparticles Electrosynthesis AU-Pt nanoparticles |
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