中文摘要：

利用电纺丝技术制得钯/碳纳米纤维复合材料（Pd/CNFs）,并将其用于修饰玻碳电极Pd/CNF-GCE/CME。Pd/CNF-GCE/CME对邻苯二酚和对苯二酚的氧化还原反应具有较高的电催化活性,显著提高了二者电化学反应的可逆性。考察了支持电解质的酸度对邻苯二酚和对苯二酚电化学响应的影响,选用0.1mol/LPBS（pH8.0）作为支持电解质。用微分脉冲伏安（DPV）法对邻苯二酚和对苯二酚进行选择性检测：当混合溶液中存在50μmol/L对苯二酚时,邻苯二酚的氧化峰电流与其浓度在1～90μmol/L范围内呈线性关系,检出限为0.3μmol/L（S/N=3）;当存在50μmol/L邻苯二酚时,对苯二酚的氧化峰电流与其浓度在2～100μmol/L范围内呈线性关系,检出限为1.0μmol/L。另外,此修饰电极具有较好的重现性和较强的抗干扰能力。将此修饰电极用于模拟水样中邻苯二酚和对苯二酚的测定,结果令人满意。

英文摘要：

Palladium nanoparticle/carbon nanofibers（Pd/CNFs） were prepared by electrospinning technique with subsequent thermal treatments and were employed to modify glassy carbon electrode （Pd/CNF-GCE/ CME）. Pd/CNF-GCE/CME exhibited excellent electrocatalytie activities towards cateehol and hydroquinone, and the reversibility of eateehol and hydroquinone were significantly improved. The effects of pH value on the oxidation peak current and potential of catechol and hydroquinone were studied by differential pulse vohammetry（DPV）, and 0. 1 mol/L PBS （pH 8.0） was selected as the supporting electrolyte. Under the optimized conditions, the oxidation peak current of catechol was linearly with the concentration of catechol in the range of 1 -90 μmol/L in the presence of 50 μmol/L hydroquinone with the detection limit of O. 3 Ixmol/L（ S/N = 3 ） and the oxidation peak current of hydroquinone was linearly with the concentration of hydroquinone in the range of 2 - 100 μmol/L in the presence of 50μmol/L catechol with the detection limit of 1.0 μmol/L. Furthermore, the modified electrode exhibited good reproducibility and selectivity. The modified electrode has been used for the determination of catechol and hydroquinone in imitative water samples with satisfactory results.