Bimetallic catalyst of PtIr nanoparticles with high electrocatalytic ability for hydrogen peroxide oxidation

Shih Hong Chang, Min Hsin Yeh, John Rick, Wei Nien Su, Din Goa Liu, Jyh Fu Lee, Chung Chiun Liu, Bing Joe Hwang

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

Carbon supported platinum-iridium bimetallic nanoparticles (PtIr/C) for the electrochemical sensing of hydrogen peroxide (H2O2) were developed. Both the cyclic voltammogram (CV) and the amperometric response indicated that PtIr/C possesses a higher oxidation current than either Pt/C or Ir/C over the detection range 0-10 mM at 0.25 V (vs. SCE). The addition of Ir appears to facilitate oxidation kinetics and decrease the competitive adsorption of dioxygen and oxygenated intermediates. These changes were investigated by electrochemical measurements and X-ray absorption near edge spectroscopy (XANES). This study demonstrated that the PtIr/C provide a stable platform for electrochemical sensing of H2O2-derivated biospecies without enzymes and redox mediators.

Original languageEnglish
Pages (from-to)55-60
Number of pages6
JournalSensors and Actuators, B: Chemical
Volume190
DOIs
StatePublished - 2014

Keywords

  • Bimetallic nanocatalysts
  • Electrocatalytic activity
  • Hydrogen peroxide oxidation reaction
  • Platinum
  • Unfilled d-states

Fingerprint

Dive into the research topics of 'Bimetallic catalyst of PtIr nanoparticles with high electrocatalytic ability for hydrogen peroxide oxidation'. Together they form a unique fingerprint.

Cite this