Comparison of electrocatalytic activity for glucose electrooxidation of gold nanoparticles fabricated by different methods

Abstract

In this study, the gold nanoparticles (AuNPs) without carbon support were prepared using the well-known citrate reduction method. The carbon supported AuNPs nanocomposites were fabricated by two different approaches: chemical adsorption of AuNPs from the prepared citrate stabilized AuNP colloidal solution on the carbon powder surface and one-pot microwave-assisted synthesis. The nanocomposites were characterized using scanning electron microscopy (SEM) and inductively coupled plasma optical emission spectroscopy (ICP-OES). The electrocatalytic activity of the prepared catalysts was evaluated for the electrooxidation of glucose in an alkaline media using cyclic voltammetry. The highest electrocatalytic activity was observed for the catalyst of carbon supported Au nanoparticles prepared by microwave-assisted synthesis, followed by the catalyst of carbon supported Au nanoparticles prepared by means of the adsorption method, whereas the pure Au nanoparticles without carbon support exhibited the lowest electrocatalytic properties for glucose electrooxidation.

Flexible Pt2Pd alloy nanosheet electrocatalysts for efficient oxygen reduction reaction and zinc–air batteries

“…We chose the borane morpholine complex as the reductant due to its mild reaction conditions, high safety profile, and low reverse reaction. [34][35][36] Moreover, it has been reported to be effective in the synthesis of PdPt NPs. 37 After the addition of the borane morpholine complex, the final Pt 2 -Pd PANS was obtained.…”

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].…”