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首页> 外文期刊>International Journal of Electrochemical Science >Synergistic Effects of Bismuth Adatoms on Electrocatalytic Properties of Electrodeposited Nanostructured Platinum Electrodes
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Synergistic Effects of Bismuth Adatoms on Electrocatalytic Properties of Electrodeposited Nanostructured Platinum Electrodes

机译：铋原子对电沉积纳米结构铂电极电催化性能的协同效应

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摘要

An innovative simple procedure for preparation of platinum nanostructured electrode deposited on atantalum substrate by application of a square wave potential regime has been established. Thepotential regime comprises a square wave between two limits, the lower limit allows spontaneousdeposition of platinum while the upper limit does not. The dependence of the produced particles interms of size and uniformity of distribution was explored. The optimal conditions for preparation ofthe nanostructured platinum deposits were 100 Hz frequency, -0.4 V and 0.00 V lower and higher-limits of the square wave respectively with an amplitude of 0.4 V . The optimal concentration of PtCl4 -3 -3 3+ was 1.0x10 M. The prepared surfaces were allowed to contact 0.5 M H2SO4 + 1x10 M Bi solutionwere Bi atoms were irreversibly adsorbed at the platinum nanostructured surfaces to form PtnanoBiadsurfaces (a notation for platinum nanostructured surface with irreversibly adsorbed Bi atoms). Theelectrocatalytic properties of PtnanoBiad catalytic surfaces were tested for electrooxidation of methanoland formic acid. PtnanoBiad electrode showed higher electrocatalytic properties than the plain Ptnanoelectrode. This proves the notion of the synergistic effects of Bi adatoms and nanostructured surfacesin imparting higher electrocatalytic properties to platinum electrodes.
机译：建立了一种创新的简单程序，通过应用方波电势机制来制备沉积在钽基板上的铂纳米结构电极。势态包括两个极限之间的方波，下限允许自发沉积铂，而上限则不允许。探索了所产生的颗粒对尺寸和分布均匀性的依赖性。制备纳米结构铂沉积物的最佳条件是频率为100 Hz，振幅为0.4 V的方波的下限和上限分别为-0.4 V和0.00V。 PtCl4 -3 -3 3+的最佳浓度为1.0x10M。使制备的表面接触0.5 M H2SO4 + 1x10 M Bi溶液，将Bi原子不可逆地吸附在铂纳米结构表面上，以形成PtnanoBiadsurfaces（铂纳米结构表示法）表面具有不可逆吸附的Bi原子）。测试了PtnanoBiad催化表面的电催化性能，以测定甲醇和甲酸的电氧化性能。 PtnanoBiad电极显示出比普通Ptnano电极更高的电催化性能。这证明了Bi吸附原子和纳米结构表面在赋予铂电极更高的电催化性能方面的协同作用。

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