Hydrogen peroxide sensor based on Prussian blue electrodeposited on (3-mercaptopropyl)-trimethoxysilane polymer-modified gold electrode.
A hydrogen peroxide (H(2)O(2)) sensor was developed by electrodepositing Prussian blue (PB) on a gold electrode modified with (3-mercaptopropyl)-trimethoxysilane (MPS) polymer. The characterization of the self-assembled electrode was investigated by cyclic voltammetry and electrochemical impedance spectroscopy. The results of electrochemical experiments showed that such constructed sensor had a favorable catalytic ability to reduce H(2)O(2). The MPS film on the modified gold electrode greatly enhanced the pH-adaptive range of PB. Large surface-to-volume ratio property of double-layer 2d-network MPS-modified PB electrode enabled stable and highly sensitive performance of the non-enzymatic H(2)O(2) sensor. The linear range of H(2)O(2) determined is from 2.0 × 10(-6) to 2.0 × 10(-4) mol L(-1) with a correlation coefficient of 0.9991 and a detection limit for H(2)O(2) of 1.8 × 10(-6) mol L(-1). The influences of the potentially interfering substances on the determination of H(2)O(2) were investigated. This modified electrode exhibits a good selectivity and high sensitivity with satisfactory results.
Zhang
Yu
Y
Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, School of Chemistry and Chemical Engineering, Southwest University, Chongqing, People's Republic of China.
Luo
Hong Qun
HQ
Li
Nian Bing
NB
D004566:Electrodes; D005295:Ferrocyanides / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000032:analysis*; D017646:Organosilicon Compounds; D011108:Polymers / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*
D005295:Ferrocyanides; D017646:Organosilicon Compounds; D011108:Polymers; D012821:Silanes; D006046:Gold; C102833:(3-mercaptopropyl)trimethoxysilane; D006861:Hydrogen Peroxide; C000170:ferric ferrocyanide