对苯二甲酸
金属有机骨架
电化学
选择性
安培法
电极
电催化剂
无机化学
可逆氢电极
基质(水族馆)
化学
过氧化氢
检出限
水热合成
热液循环
材料科学
催化作用
化学工程
工作电极
有机化学
物理化学
聚酯纤维
海洋学
吸附
色谱法
工程类
地质学
作者
Lizi Yang,Cailing Xu,Weichun Ye,Weisheng Liu
标识
DOI:10.1016/j.snb.2015.03.104
摘要
In this work, a new Co metal-organic framework (Co(pbda)(4,4-bpy)·2H2O]nCo-MOF) (bpy = 4,4-bipyridine; H2pbda = 3-(pyridine-3-yloxy)benzene-1,2-dicarboxylic acid) was synthesized under hydrothermal conditions and then applied as the active materials for high performance hydrogen peroxide sensor. Single-crystal X-ray analysis reveals a three-dimensional supramolecular architecture with a uninodal 4-connected net with the gis topology. The cyclic voltammogram of the Co-MOF modified GC electrode shows a pair of reduction peaks at ca. −0.40 V in 0.1 M NaOH solution corresponding to CoIII-MOF/CoII-MOF couple. The amperometric response demonstrates the high electrocatalytic activity of the Co-MOF modified GC electrode towards H2O2 reduction with a wide linear range from 5 μM to 9.0 mM, a low detection limit of 3.76 μM and a high sensitivity of 83.10 μA mM−1 cm2 at an applied potential of −0.40 V. Moreover, the favourable selectivity and long-term stability were also obtained. Additionally, it was found that Co-MOF possessed highly efficient intrinsic peroxidase-like activity so that it could catalyze H2O2 to produce hydroxyl radical, which oxidized peroxidase substrate (terephthalic acid) to produce colour. Thus, this new Co-MOF has a great potential for applications in H2O2 electrochemical detection.
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