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Novel bimetallic nanoparticles have been synthesized via rapid microwave irradiation, leading to an improved sensitivity anda highly anti-interference property for amperometric biosensor in H2O2 detection. The material characterizationswere performed by TEM, XRD, and EDX, which show the bimetallic formation of Pt-based catalysts and well-dispersed nanoparticles of2–5 nm. The sensitivities for the detection of H2O2 of PtRu, PtAu, and PtIr as the biosensor working electrode catalysts are 539.01 (R2=0.99), 415.46 (R2=0.99), and 404.52 (R2=0.97) μA mM−1 cm-2, respectively, nearly twice higher than the pure Pt catalyst (221.77 μA mM−1 cm−2, R2=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

international journal of electrochemistry

Improvement of Amperometric Biosensor Performance for H2O2Detection based on Bimetallic PtM (M = Ru, Au, and Ir) Nanoparticles