钯修饰电极的制备及其对H_2O_2的电催化还原作用研究 |
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引用本文: | 宋诗稳,王小梅,齐广才,于浩.钯修饰电极的制备及其对H_2O_2的电催化还原作用研究[J].安徽农业科学,2012,40(22):11501-11503. |
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作者姓名: | 宋诗稳 王小梅 齐广才 于浩 |
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作者单位: | 1. 延安大学能源与环境工程学院,陕西延安716000;延安大学化学与化工学院,陕西延安716000 2. 延安大学化学与化工学院,陕西延安,716000 |
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基金项目: | 延安大学自然科学专硕基金 |
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摘 要: | 目的]研究钯化学修饰电极在H2O2检测中的应用。方法]采用循环伏安法制备了钯修饰的复合陶瓷碳电极(Pd/CCE),研究了该修饰电极对H2O2的电催化性能。结果]在含有PdCl2.2H2O的H2SO4溶液中(pH 1.2),控制扫描电位范围为0~1.0 V(vs.SCE)连续扫描40圈时制得的Pd/CCE修饰电极对H2O2具有较强的电催化活性,安培法检测H2O2的线性范围为6.0×10-5~1.0×10-2mol/L,检出限为2.2×10-5mol/L(3Sb)。结论]直接电沉积得到的钯修饰电极,可实现较低电位下测定H2O2,且电极具有制作简单、价格低廉、响应时间短和表面容易更新等特点。
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关 键 词: | 化学修饰电极 钯 电催化 过氧化氢 |
Preparation of Pd Modified Electrode and Its Electrocatalysis for H2O2 Reduction |
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Institution: | SONG Shi-wen et al(College of Energy and Environmental Engineering,Yan’an University,Yan’an,Shaanxi 716000) |
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Abstract: | Objective] To study the electrocatalysis for H2O2 using Pd chemically modified electrode.Method] A new type of Pd modified composite ceramic carbon electrode(Pd/CCE) was fabricated by using cyclic voltammetry and its electrocatalytic reduction of H2O2 was investigated.Result] The modified electrode had excellent electrocatalytic activity towards the reduction of H2O2 containing PdCl2·2H2O with the pH of 1.2 by controlling the scanning potential at 0-1.0 V(vs.SCE) and scanning for 40 circles.Under the optimum conditions,the catalytic current had relationship with concentration of H2O2 over the range of 6.0×10-5 mol/L to 1.0×10-2 mol/L with the detection limit of 2.2×10-5 mol/L(3Sb).Conclusion] The Pd/CCE obtained by electrodeposition could determine H2O2 under lower working potential.Additionally,it had many advantages including simplicity and convenience of preparation,cheapness of raw materials,short response time and convenience of surface renewal. |
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Keywords: | Chemically modified electrode Palladium Electrocatalysis Hydrogen peroxide |
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