Improvement of Amperometric Biosensor Performance for H2O2 Detection based on Bimetallic PtM (M = Ru, Au, and Ir) Nanoparticles. (8th February 2012)

• Record Type: Journal Article
• Authors: Zhang, Yuan; Janyasupab, Metini; Liu, Chen-Wei; Lin, Po-Yuan; Wang, Kuan-Wen; Xu, Jiaqiang; Liu, Chung-Chiun
• Other Names: Anik Ulku Academic Editor.
• Is Part Of: International journal of electrochemistry. Volume 2012(2012)
• Publication Date: 2012-02-08
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; 660.297
• DOI: 10.1155/2012/410846
• Languages: English
• ISSNs: 2090-3529

Abstract

Abstract : Novel bimetallic nanoparticles have been synthesized via rapid microwave irradiation, leading to an improved sensitivity and a highly anti-interference property for amperometric biosensor in H2 O2 detection. The material characterizations were performed by TEM, XRD, and EDX, which show the bimetallic formation of Pt-based catalysts and well-dispersed nanoparticles of 2–5 nm. The sensitivities for the detection of H2 O2 of PtRu, PtAu, and PtIr as the biosensor working electrode catalysts are 539.01 (R 2 = 0.99 ), 415.46 (R 2 = 0.99 ), and 404.52 (R 2 = 0.97 ) μA mM −1 cm -2, respectively, nearly twice higher than the pure Pt catalyst (221.77 μA mM −1 cm −2, R 2 = 0.98 ), at a low applied potential of +0.25 V versus Ag/AgCl. Furthermore, Pt-Ru and Pt-Ir show a highly sensitive response and a promising anti-interference capability to ascorbic acid, a major interferent, by reducing the interferent current as low as 7-8% significantly lower than that of Pt (30% change). The enhancement of both sensitivity and selectivity in the bimetallic catalysts can be found practical applications in biosensing.