Investigations on redox behaviour of Pu(IV)/Pu(III) in H2SO4 on Pt nanoparticles-modified glassy carbon and platinum electrodes

Abstract

Abstract Redox behaviour of Pu(IV)/Pu(III) couple in 1 M H2SO4 was investigated on platinum nanoparticles (PtNPs)-modified glassy carbon (GC) and Pt electrodes. PtNPs-modified electrodes were prepared by electrodeposition of Pt from 10 mM K2PtCl4+0.1 M H2SO4 solution. Redox kinetics were observed to improve in both the oxidation and reduction processes after electrodeposition of PtNPs in contrast to bare electrodes. However, significant improvement was seen for the reduction of Pu(IV) to Pu(III) in PtNPs coated GC electrode compared to bare GC electrode. These studies are of great relevance to develop electroanalytical methodologies for Pu determination using nanoparticles modified electrodes.