Electrochemically reduced graphene oxide on gold nanoparticles modified with a polyoxomolybdate film. Highly sensitive non-enzymatic electrochemical detection of H2O2

Gold nanoparticles (AuNPs) were prepared via the chloroauric acidreduction using Keggin-type anions (PMo12O403−). The layer of AuNPs was deposited on the glassy carbon electrode (GC) and conditioned using repetitive potential cycling between 0.3 and −0.4 V vs. SCE in the buffer solution at pH = 6. The changes in the polyoxometalate structure upon cycling are studied using Raman spectra. Graphene oxide (GO) was drop-cast on a thin layer of AuNPs...