化学研究与应用
化學研究與應用
화학연구여응용
CHEMICAL RESEARCH AND APPLICATION
2010年
3期
384-386
,共3页
多金属氧酸盐%化学传感器%电化学性质
多金屬氧痠鹽%化學傳感器%電化學性質
다금속양산염%화학전감기%전화학성질
polyoxometalate%electrochemical sensor%electrochemical behavior
A polyoxometalate (NH_4)_(42)[Mo_(132)O_(372)(CH_3 COO)_(30)(H_2O)_(72)] was synthesized by electrochemical method. The polyoxometalate film was gown on a glassy carbon by the electrodepositing method. Its electrochemical behaviors were studied by cyclic vohammetry and amperometry. This film electrode exhibited a high catalytic activity for iodate reduction. By determining the steady-state current of iodate with constant potential amperometry, the optimal detection potential was obtained, which was 0.2V. Amperometry revealed a good linear relationship between peak current and the concentration of iodate in the range of 1×10~(-6) and 2 × 10~(-4) mol/L and the detection limit of 5 × 10~(-7) mol/L. The diffusion coefficient of 4.45 × 10~(-7)cm~2/s for iodate was calculated. As a result,it is much promising for the polynxometalate film modified electrode to be used as an electrochemical sensor for detecting the reduction of iodate.
