Synthesis of Platinum Nanoparticles by using Molybdenum Disulfide as a Template and its Application to Enzyme‐like Catalysis

Abstract

Abstract Platinum nanoparticles were synthesized with molybdenum disulfide (MoS 2 ) as a template through a facile hydrothermal method. The as‐prepared nanocomposites (Pt‐MoS 2 ) were characterized by TEM, HRTEM, electrochemical impedance spectroscopy, and X‐ray photoelectron spectroscopy, and they were then used to fabricate a biosensor for enzyme‐like catalysis of hydrogen peroxide (H 2 O 2 ). The electrochemical activity for the reduction reactions of H 2 O 2 was evaluated in N 2 ‐saturated phosphate buffer solution. The cyclic voltammetry and amperometry results demonstrated that the biosensor modified by the nanocomposites exhibited a fast amperometric response and excellent electrocatalytic activity for reduction of H 2 O 2 with a wide linear range from 0.004 to 48.5 m M and a low detection limit of 0.001 m M at 3σ. Thus, the present work indicates that Pt nanoparticles can be synthesized on the surface of few‐layer MoS 2 owing to interfacial PtS bonds and that the composites show a clear enhancement in the catalytic activity relative to that of the platinum nanoparticles alone. This method provides a new way to prepare metal nanoparticles for extensive applications in the field of catalysis.