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

Abstract

A new electrochemical technique to detect hydrogen peroxide ( H 2 O 2) 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 – Bi III greatly enhanced the electrocatalysis of GCE–AS- Pt – Bi III towards H 2 O 2, which is ascribed to more Pt – OH obtained on GCE–AS- Pt – Bi III surface for the presence of Bi III . Based on its high electrocatalysis, GCE–AS- Pt – Bi III was used to determine the content of H 2 O 2 in the sample of sheet bean curd with standard addition method. Meantime, its electrocatalytic activity also was studied.