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Synthesis of Platinum Nanoparticles by using Molybdenum Disulfide as a Template and its Application to Enzyme‐like Catalysis
Author(s) -
Duan Kaiyue,
Du Yongling,
Feng Qingliang,
Ye Xiaoliang,
Xie Hong,
Xue Muyin,
Wang Chunming
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201400051
Subject(s) - molybdenum disulfide , platinum nanoparticles , catalysis , platinum , cyclic voltammetry , biosensor , amperometry , dielectric spectroscopy , nanoparticle , high resolution transmission electron microscopy , nanocomposite , materials science , inorganic chemistry , electrocatalyst , molybdenum , electrochemistry , chemistry , chemical engineering , nanotechnology , organic chemistry , electrode , transmission electron microscopy , engineering , metallurgy
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 PtS 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.