An unusual H2O2 electrochemical sensor based on Ni(OH)(2) nanoplates grown on Cu substrate

作者：Gu, Aixia; Wang, Guangfeng; Gu, Jing; Zhang, Xiaojun^*; Fang, Bin

来源：Electrochimica Acta, 2010, 55(24): 7182-7187.

DOI：10.1016/j.electacta.2010.07.023

• Cu-Ni(OH)(2)
• Nanocomposites
• Electocatalysis
• Amperometric sensor
• H2O2

In this work. Ni(OH)(2) nanoplates grown on the Cu substrate were synthesized and characterized by scanning electron microscopy (SEM). X-ray powder diffraction (XRD). and X-ray photoelectron spectroscopy (XPS). Then a novel Cu-Ni(OH)(2) modified glass carbon electrode (Cu-Ni(OH)(2)/GCE) was fabricated and evaluated by electrochemical impedance spectroscopy (EIS). cyclic voltammetry (CV). and typical amperometric response (i-t) method Exhilaratingly, the Cu-Ni(OH)(2)/GCE shows significant electrocatalytic activity toward the reduction of H2O2 At an applied potential of-0 1 V, the sensor produces an ultrahigh sensitivity of 408 1 mu A mM(-1) with a low detection limit of 1.5 mu M (S/N = 3) The response time of the proposed electrode was less than 5s What's more, the proposed sensor displays excellent selectivity, good stability, and satisfying repeatability.

• 出版日期2010-10-1
• 单位安徽师范大学