中文摘要：

文章将纳米金与钴氢氧化物膜的催化作用有效结合,制备了GNPs/CoOOH复合修饰电极,该修饰电极在碱性条件下对邻苯二酚和对苯二酚具有较强的电催化活性。考察了支持电解质酸度及纳米金沉积时间对邻苯二酚和对苯二酚电化学响应的影响,选取0.1 mol/L PBS（pH 10.0）作为支持电解质,纳米金的最佳沉积时间为4 min。在优化的实验条件下,利用差示脉冲伏安法（DPV）对邻苯二酚和对苯二酚进行选择性检测：当两者浓度同时改变时,对苯二酚和邻苯二酚的氧化峰电流与其浓度分别在7~100μmol/L和6~100μmol/L范围内呈良好的线性关系,对应的检出限分别为0.9、0.8μmol/L（S/N=3）。该复合修饰电极具有较好的重现性、稳定性及较强的抗干扰能力。

英文摘要：

Combing the advantageous features of gold nanoparticles （GNPs） and cobalt hydroxide film （CoOOH）, GNPs/ CoOOH composite film was prepared on the surface of glassy carbon electrode. Under alkaline solutions, the modified electrode exhibited excellent electrocatalytic activities towards catechol （CA） and hydroquinone （HQ）. Effects of pH value and electrodeposition time of GNPs on the oxidation peak current of catechol and hydroquinone were studied by differential pulse voltammetry （DPV）. The optimized pH value and electrodeposition time were separately 10.0 （0.1 mol/L PBS） and 4 rain. Under the optimized conditions, the oxidation peak current of HQ and CA were separately linearly with concentration of CA in the range of 7-100 μmol/L and 6-100 μmol/L with the detection limit of 0.9 μmol/L （S/N=3） for HQ and 0.8 μmol/L （S/N= 3） for CA. The modified electrode exhibited good producibility, stability and selectivity.