FLOWER-LIKE NANOPARTICLES OF Pt-BiIII ASSEMBLED ON AGMATINE SULFATE MODIFIED GLASSY CARBON ELECTRODE AND THEIR ELECTROCATALYSIS OF H2O2

A new electrochemical technique to detect hydrogen peroxide (H2O2) was developed. The Pt nanoparticles and Bi-III were subsequently assembled on agmatine sulfate (AS) modified glassy carbon electrode (GCE) and the prepared GCE-AS-Pt-Bi-III was characterized by scanning electron microscopy (SEM) with result showing that the flower-like nanostructure of Pt-Bi-III was yielded. Compared with Pt nanoparticles, the flower-like nanostructure of Pt-BiIII greatly enhanced the electrocatalysis of GCE-AS-Pt-Bi-III towards H2O2, which is ascribed to more Pt-OH obtained on GCE-AS-Pt-BiIII surface for the presence of BiIII. Based on its high electrocatalysis, GCE-AS-PtBiIII was used to determine the content of H2O2 in the sample of sheet bean curd with standard addition method. Meantime, its electrocatalytic activity also was studied.