Platinum-Niobium(V) Oxide/Carbon Nanocomposites Prepared By Microwave Synthesis For Ethanol Oxidation

Abstract

In the present work, Pt nanoparticles were deposited by means of microwave synthesis on the primary carbon supported Nb2O5 composite which was prepared in two different ways: (A) by dispersion of Nb2O5 and carbon with the mass ratio equal to 1:1 in a 2-propanol solution by ultrasonication for 30 min. with further desiccation of the mixture and (B) by heating the Nb2O5/C composite obtained according to the procedure (A) at 500 °C for 2 h. The transmission electron microscopy was used to determine the shape and the size of catalyst particles. X-ray diffraction and inductively coupled plasma optical emission spectroscopy were employed to characterize the structure and composition of the synthesized catalysts. The electrocatalytic activity of the synthesized catalysts towards the oxidation of ethanol in an alkaline medium was investigated by means of cyclic voltammetry.

Co3O4/C and Au supported Co3O4/C nanocomposites – Peculiarities of fabrication and application towards oxygen reduction reaction

“…Cobalt or cobalt oxide nanoparticles as well as gold nanoparticles can be reduced using various reducing agents. Commonly used reducing agents for gold nanoparticles include sodium borohydride, sodium citrate, ascorbic acid and alcohols [22][23][24]. Co or cobalt oxides nanoparticles can also be reduced by polyols or borohydride from cobalt salt solutions or by the decomposition of an organometallic [25][26][27].…”

Oxidatively induced exposure of active surface area during microwave assisted formation of Pt3Co nanoparticles for oxygen reduction reaction

“…Komarneni et al 38 investigated a microwave based polyol route toward Pt and Ag NP production wherein a greatly enhanced reaction rate was observed. Later, more solvothermal microwave processes were explored for the production of Pt-Co nanowires 39 and nanoparticles 40,41 as active catalyst materials. Most of the methods reported do however involve multiple, sometimes complex, steps that result in relatively complicated procedures and ultimately impair the commercial feasibility.…”