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利用软模板结合电沉积法制备了一种有序化氰桥混配聚合物修饰铂电极(Nd-Fe-MoO42-/Pt),用循环伏安法研究了在该化学修饰铂电极的丙三醇电催化氧化,并重点讨论了支持电解质的H+和SO42-浓度、丙三醇浓度、扫速等因素对丙三醇电催化氧化活性的影响.结果表明,在弱酸性硫酸钠支持电解质中,适当量SO42-的存在有助于提高Nd-Fe-MoO42-/Pt电极的丙三醇电催化氧化电流;-0.2~0.3 V电位区间内,其丙三醇氧化峰1电流与循环伏安曲线扫描速率的平方根之间呈现良好的线性关系,体现了扩散控制的反应特性;Nd-Fe-MoO42-/Pt电极的丙三醇电催化氧化电流密度值约为裸铂电极的4倍,而丙三醇电催化氧化反应的表观活化能相对较小,修饰电极的电催化氧化呈现了明显的协同效应,其电催化氧化活性高、电流响应快、催化稳定性好.
An ordered nitrocellulose bridged polymer modified platinum electrode (Nd-Fe-MoO42- / Pt) was prepared by soft template and electrodeposition. The cyclic voltammetry And electrocatalytic oxidation of alcohols were studied.The effects of H + and SO42- concentration, glycerol concentration and sweeping speed on the electrocatalytic oxidation of glycerol were also discussed.The results showed that in weak acid sodium sulfate supported electrolytes, The presence of an appropriate amount of SO42- helps to improve the glycerol electrocatalytic oxidation current of the Nd-Fe-MoO42- / Pt electrode. In the potential range of -0.2 ~ 0.3 V, the peak current of glycerol oxidation 1 and the cyclic voltammetry The square root of the scan rate showed a good linear relationship, reflecting the diffusion control of the reaction characteristics; Nd-Fe-MoO42- / Pt electrode glycerol electrocatalytic oxidation current density is about 4 times the bare platinum electrode, and C The apparent activation energy of electrocatalytic oxidation of triol is relatively small. The electrocatalytic oxidation of the modified electrode exhibits a synergistic effect. The electrocatalytic oxidation activity is high, the current response is fast, and the catalytic stability is good.