1,10-菲咯啉Cu(Ⅱ)配合物修饰碳糊电极的电催化析氢性能

Cu(Ⅱ) Complex Based on 1,10-Phenanthroline as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

以1,10-菲咯啉和5-磺基间苯二甲酸单钠盐为配体,通过水热法制备Cu(Ⅱ)配合物,并通过IR、XPS、XRD、TG以及元素分析对配合物结构进行了表征。首次利用该Cu(Ⅱ)配合物修饰碳糊电极研究其在酸性介质中的电催化析氢活性。采用阴极极化曲线,交流阻抗等电化学方法对GPE和Cu(Ⅱ)配合物-GPE电极的电催化析氢性能进行测试,结果表明Cu(Ⅱ)配合物-GPE电极的析氢电势比GPE电极的析氢电势正移了170 mV,且Cu(Ⅱ)配合物-GPE的交换电流密度是GPE电极的13倍。Cu(Ⅱ)配合物不但能降低析氢反应过程中的过电势,增强电极的催化活性,而且对析氢反应过程中对于电子的转移起到一定促进作用。

The Cu（Ⅱ） complex based on 1,10-phenanthroline and 5-sulfaisophthalate was mixed with graphite paste to form a work electrode for the hydrogen evolution reaction （HER） in acid media. Evaluation of the electrode activity was carried out in 1.0 molL-1 H2SO4 by polarization curve and electrochemical impedance spectroscopy （EIS）. The electrochemical results reveal that the hydrogen evolution potential of Cu（Ⅱ） complex-GPE is positively shifted by 170 mV and the exchanging current density i0 is increased to 13 times compared to that of bare GPE. The presence of Cu（Ⅱ） complex can enhance the catalytic activity of the working electrode due to reducing the overpotential in the hydrogen evolution process. At the same time, Cu（Ⅱ） complex in the hydrogen evolution process for the transfer of electrons play a catalytic role.