Synthesis and electrocatalytic activity of multi-walled carbon nanotubes/Cu–Ag nanocomposites
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Cu–Ag bimetallic nanoparticles with atomic ratio of 2.1:1 and diameter in the range of 15–30 nm were decorated on acid-treated multi-walled carbon nanotubes by a chemical reduction method, which was characterized by transmission electron microscope (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and high-resolution transmission electron microscopy (HRTEM). The Cu–Ag/MWNTs nanocomposites were used to construct a modified electrode toward biosensing of H2O2 with a high sensitivity. The catalytic ability of MWNTs/Cu–Ag toward H2O2 was much better than that of MWNTs/Cu and MWNTs/Ag, which indicated that there is a cooperation effect between Cu and Ag.
KeywordsGlassy Carbon Electrode Modify Electrode Hydrazine Hydrate Bimetallic Nanocomposite Mixed Nitrate Solution
We thank Science and Technological Fund of Anhui Province for Outstanding Youth (No. 04046065), the Education Department (Nos. 2001KJ115ZD, 2006KJ006TD) of Anhui Province, the State Education Ministry (EYTP, SRF for ROCS) and National Natural Science Foundation (Nos. 20271002, 20490217, 20671002) of P.R. China for financial support.