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首页> 外文期刊>Journal of Applied Electrochemistry >Electro-reduction of oxygen and electro-oxidation of methanol at Pd monolayer-modified macroporous Pt electrode
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Electro-reduction of oxygen and electro-oxidation of methanol at Pd monolayer-modified macroporous Pt electrode

机译：钯单层修饰大孔铂电极上氧的电还原和甲醇的电氧化

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With polystyrene latex spheres self-assembled on indium tin oxide-coated glass electrode as templates, highly ordered macroporous Pt was prepared by electrochemical deposition. Then, the macroporous Pt was modified by Pd monolayer involving the galvanic displacement of Cu monolayer formed by under-potential deposition on macroporous Pt. Electrocatalytic properties of the Pd-modified macroporous Pt electrode for oxygen reduction were investigated by cyclic voltammetry and chronoamperometry in O2-saturated solution containing 0.1 M HClO4. Methanol electro-oxidation on the Pd-modified macroporous Pt surfaces in 0.5 M H2SO4 containing 1 M CH3OH was studied by cyclic voltammetry. The corresponding results showed that Pd-modified macroporous Pt electrode had negative catalytic activity for methanol oxidation in compared with macroporous Pt. However, Pd-modified macroporous Pt electrode had positive electrocatalytic activity to O2 reduction.
机译：以自组装在氧化铟锡玻璃电极上的聚苯乙烯胶乳球为模板，通过电化学沉积制备了高度有序的大孔铂。然后，通过Pd单层对大孔Pt进行改性，该过程涉及在大孔Pt上通过欠电势沉积形成的Cu单层的电位移。通过循环伏安法和计时电流法研究了Pd修饰的大孔Pt电极在含0.1 M HClO 4 的O 2 饱和溶液中对氧还原的电催化性能。通过循环伏安法研究了0.5 MH 2 SO 4 中含有1 M CH 3 OH的Pd修饰的大孔Pt表面上的甲醇电氧化。 。相应的结果表明，与大孔Pt相比，Pd修饰的大孔Pt电极对甲醇氧化具有负催化活性。然而，Pd修饰的大孔Pt电极对O 2 的还原具有正电催化活性。

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