A sensitivity-controlled hydrogen peroxide sensor based on self-assembled Prussian Blue modified electrode

作者：Liu Yu; Chu Zhenyu; Jin Wanqin^*

来源：Electrochemistry Communications, 2009, 11(2): 484-487.

DOI：10.1016/j.elecom.2008.12.029

• Prussian Blue
• Self-assembly
• Modified electrode
• Hydrogen peroxide
• Sensor

In this communication, a hydrogen peroxide (H(2)O(2)) sensor based on self-assembled Prussian Blue (PB) modified electrode was reported. Thin film of PB was deposited on the electrode by self-assembly process including multiple sequential adsorption of ferric ions and hexacyanoferrate ions. The as-prepared PB modified electrode displayed sufficient stability for practical sensing application. At an applied potential of -0.05 V vs. Ag/AgCl (sat. KCI), PB modified electrode with 30 layers exhibited a linear dependence on H(2)O(2) concentration in the range of 1 X 10(-6)-4 x 10(-4) M (r = 0.9998) with a sensitivity of 625 mA M(-1) cm(-2). It was found that the sensitivity of H(2)O(2) sensors could be well controlled by adjusting the number of deposition cycles for PB preparation. This work demonstrates the feasibility of self-assembled PB modified electrode in sensing application, and provides an effective approach to control the sensitivity of PB-based amperometric biosensors.

• 出版日期2009-2
• 单位南京工业大学