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首页> 外文期刊>International Journal of Electrochemical Science >Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium
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Enhanced Activity of Polycrystalline Palladium Decorated by Ru Nanoislands for Hydrogen Evolution in Alkaline Medium

机译：Ru纳米岛修饰的多晶钯在碱性介质中析氢的增强活性

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摘要

Hydrogen evolution reaction (HER) was studied on polycrystalline Pd, Pd(poly), decorated byspontaneously deposited Ru nanoislands below full coverage. Surface features of as-preparedbimetallic Ru/Pd(poly) electrodes were explored by Field Emission Scanning Electron Microscopywith Energy Dispersive X-ray Spectrometer. Electrochemical properties and hydrogen evolutionactivities of obtained electrodes were investigated in an alkaline electrolyte by Cyclic and LinearSweep Voltammetry, respectively. It was found that the activities of bimetallic Ru/Pd(poly) electrodesfor HER significantly exceeded the activity of bare Pd(poly) and approached the activity of Pt, whichis the most active material for this reaction. This enhancement was explained by the favorableinfluence of the electronic interaction between Pd substrate and Ru nanoislands on the adsorption ofthe reactive H species.
机译：对多晶Pd，Pd（poly）上的氢析出反应（HER）进行了研究，该Pd由自发沉积的Ru纳米岛在完全覆盖下修饰。用场致发射扫描电子显微镜和能量色散X射线能谱仪研究了制备的双金属Ru / Pd（poly）电极的表面特征。分别通过循环和线性扫描伏安法在碱性电解液中研究了所得电极的电化学性质和氢释放活性。结果发现，双金属Ru / Pd（poly）电极对HER的活性大大超过了裸Pd（poly）的活性，并接近了Pt的活性，Pt是该反应中最活泼的材料。 Pd底物和Ru纳米岛之间的电子相互作用对反应性H物种的吸附具有有利影响，可以解释这种增强。

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