Zhai Xiurong, Gao Zhongjun
Department of Chemisry and Chemical Engineering, Jining University, Qufu 273155, China.
Anal Sci. 2010;26(3):343-7. doi: 10.2116/analsci.26.343.
A prussian blue (PB) electrodeposited on nano Ag-coated multiwalled carbon nanotubes (nano Ag-MWNTs) was reported. Also a PB/nano Ag-MWNTs composite modified glass carbon (GC) electrode was used to investigate the electrochemical behavior concerning the reduction of hydrogen peroxide. The experiment results showed that the PB/nano Ag-MWNTs/GC electrode had a wide linear range, a fast response time and high sensitivity toward the electrocatalytic reduction of hydrogen peroxide. PB and nano Ag-MWNTs had a synergistic electrocatalytic effect toward the reduction of hydrogen peroxide. The PB/nano Ag-MWNTs/GC electrode exhibited a wide linear response range of 8 x 10(-8) to 5 x 10(-3) mol/L with a correlation coefficient of 0.998 for the detection of hydrogen peroxide. Also the response time, detection limit (S/N = 3) and sensitivity of the PB/nano Ag-MWNTs/GC electrode were respectively determined to be 2 s, 4 x 10(-8) mol/L and 920 A/mol cm(2). Another attractive characteristic was that the PB/nano Ag-MWNTs/GC electrode showed high stability and reproducibility.
据报道，普鲁士蓝（PB）电沉积在纳米银包覆的多壁碳纳米管（nano Ag-MWNTs）上。此外，还使用了PB/nano Ag-MWNTs复合修饰玻碳（GC）电极来研究关于过氧化氢还原的电化学行为。实验结果表明，PB/nano Ag-MWNTs/GC电极具有宽线性范围、快速响应时间以及对过氧化氢电催化还原的高灵敏度。PB和nano Ag-MWNTs对过氧化氢的还原具有协同电催化作用。PB/nano Ag-MWNTs/GC电极在检测过氧化氢时呈现出8×10⁻⁸至5×10⁻³ mol/L的宽线性响应范围，相关系数为0.998。此外，PB/nano Ag-MWNTs/GC电极的响应时间、检测限（S/N = 3）和灵敏度分别确定为2 s、4×10⁻⁸ mol/L和920 A/mol cm²。另一个吸引人的特性是PB/nano Ag-MWNTs/GC电极表现出高稳定性和重现性。
