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首页> 外文期刊>Electrocatalysis >Activation of Nickel for Hydrogen Evolution by Spontaneous Deposition of Iridium
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Activation of Nickel for Hydrogen Evolution by Spontaneous Deposition of Iridium

机译：通过自发沉积铱活化镍以释放氢

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Activation of Ni electrodes was performed by spontaneous deposition of Ir from HC1 solutions of IrCl3. The efficiency of deposition has been found to depend on the aging of the precursor as well as of its aqueous solution, as revealed by IR-Vis qualitative analysis. The electrochemical behavior of activated electrodes was studied by cyclic voltammetry (CV) and quasi-stationary polarization curves for hydrogen evolution in alkaline solutions. CV shows hydrogen adsorption/desorption peaks whose magnitude is proportional to the amount of deposited Ir. Tafel plots show slopes decreasing from ca. 120 mV, typical of bare Ni, down to ca. 40 mV typical of pure Ir.
机译：通过从IrCl3的HCl溶液中自发沉积Ir来激活Ni电极。如IR-Vis定性分析所揭示的，已经发现沉积效率取决于前体及其水溶液的老化。通过循环伏安法（CV）和准静态极化曲线研究了活性电极的电化学行为，以了解碱性溶液中的氢逸出。 CV显示氢吸附/解吸峰，其大小与Ir的沉积量成正比。 Tafel图显示，坡度从ca减小。 120 mV，典型的裸镍，低至约。纯Ir典型值为40 mV。

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