کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
192839 | 459753 | 2008 | 6 صفحه PDF | دانلود رایگان |
The potential application of Al-incorporated mesoporous SiO2 (denoted as Al-MCM-41) in electrochemistry as a novel electrode material was investigated. The peak currents of K3[Fe(CN)6] remarkably increase and the peak potential separation obviously decreases at the mesoporous Al-MCM-41 modified carbon paste electrode (CPE). These phenomena suggest that the mesoporous Al-MCM-41 modified CPE possesses larger electrode area and electron transfer rate constant. Furthermore, the electrochemical behavior of epinephrine (EP) was investigated in different supporting electrolytes such as 0.01 mol L−1 HClO4 and pH 7.0 phosphate buffer. It is found that the mesoporous Al-MCM-41 modified CPE exhibits catalytic ability to the oxidation of EP due to remarkable peak current enhancement and negative shift of peak potential. The electrochemical oxidation mechanism was also discussed. Finally, a novel electrochemical method was proposed for the determination of EP, which used to determine EP in urine samples.
Journal: Electrochimica Acta - Volume 53, Issue 14, 30 May 2008, Pages 4615–4620