将DNA功能化多壁碳纳米管（MWCNTs）复合材料修饰于玻碳基底（GC）表面制得DNA-MWCNTs/GC电极，并在此基础上电沉积负载Pt纳米颗粒构建了一种新型无酶H₂O₂传感电极. 利用扫描电子显微镜（SEM）表征制得的修饰电极，同时通过循环伏安法和计时电流法研究了该传感电极的H2O2响应性能. 结果表明，该传感电极的H₂O₂检测在0.04 ~ 18.07 mmol·L^-1浓度范围内成线性相关，检出限3.85 μmol·L^-1（S/N = 3），且有良好的重现性、稳定性与选择性.

The DNA-multi-walled carbon nanotubes (MWCNTs)/glassy carbon (GC) electrode was prepared by modifying the DNA functionalized MWCNTs composite on a GC electrode. A novel non-enzymatic H₂O₂ sensing electrode was fabricated by electrodepositing Pt nanoparticles on the DNA-MWCNTs/GC electrode. The modified electrodes were characterized by scanning electron microscope (SEM). The response properties of the sensing electrode to H₂O₂ were investigated by cyclic voltammetry and chronoamperometry. The results indicated that the sensing electrode exhibited a good linear relationship between response current and H₂O₂ concentration in the range of 0.04 ~ 18.07 mmol·L^-1 with a detection limit of 3.85 μmol·L^-1 (S/N = 3), as well as excellent reproducibility, stability and selectivity.