Citation: LIU Min-Min, WEI Wen-Tao, LU Yi-Zhong, WU Hai-Bin, CHEN Wei. Synthesis of Graphene-Supported Hollow AgPd Alloy Nanoparticles and Application in Detection of Hydrogen Peroxide[J]. Chinese Journal of Analytical Chemistry, ;2012, 40(10): 1477-1481. doi: 10.3724/SP.J.1096.2012.20281
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We demonstrate a novel method to synthesize the graphene-supported AgPd alloy nanocrystals (AgPd/GO) which exhibits unique hollow structure and excellent electrocatalytic activity for H2O2 reduction. The hybrid nanomaterials were synthesized via a two-step method. The graphene supported Ag nanoparticles (Ag/GO) were first synthesized by using sodium citrate as both reducing and stabilizing agents. AgPd alloy nanoparticles supported on graphene (AgPd/GO) were then prepared through a galvanic displacement reaction at 100 ℃. The structure of the prepared materials was characterized with UV-visible spectroscopy and transmission electron microscopy (TEM). The electrochemical measurements showed that AgPd/GO had excellent electrocatalytic activity toward the reduction of hydrogen peroxide. Such hollow Ag/Pd alloy nanoparticles supported on graphene exhibited a low detection limit (1.4 μmol/L) and good linear ranges (0.01 mmol/L-1.4 mmol/L) for H2O2 detection, which render them the suitable electrochemical sensors for hydrogen peroxide detection in practical applications.
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