电沉积纳米钯修饰玻碳电极对间硝基酚的电催化还原
首发时间:2011-06-03
摘要:通过电化学沉积法制备了纳米钯修饰的玻碳电极(Pd/GC),并进行了扫描电镜和XPS表征。研究了间硝基酚在Pd/GC电极上的电催化还原行为,结果表明,与裸玻碳电极(GC)相比,在Pd/GC电极上的硝基酚的还原电位比在GC上的还原电位明显向正电位方向移动,且电流增大。恒电位电解证实,在相同电位下,Pd/GC电极上的间硝基酚的还原电流约为GC电极上的20倍。并研究了电沉积条件影响电极的催化性能,同时考察了不同pH值对Pd/GC电极催化性能的影响。
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The electrocatalytical reduction of m-nitrophenol on palladium nanoparticles modified glassy carbon electrodes
Abstract:Palladium nanoparticles modified glassy carbon electrodes (Pd/GC) were prepared via the electrodeposition of palladium on a glassy carbon (GC) electrode using cyclic voltammetry. The palladium nanoparticles were characterized by scanning electro microscope(SEM) and X-ray photoelectron spectroscopy(XPS). The cyclic voltammograms of the Pd/GC electrode in the solution of m-nitrophenol show that the reduction peak of m-nitrophenol shifts towards the more positive potentials and accompanied with an increase in the peak current compared to the bare GC electrode. In addition, the electrolysis of m-nitrophenol under a constant potential indicates that the reduction current of m-nitrophenol on the Pd/GC electrode is approximately 20 times larger than that on the bare GC electrode. The electrocatalytic activity of the Pd/GC electrode is affected by pH values of the solution.
Keywords: electrodeposition m-Nitrophenol electrocatalytic reduction Pd electrode
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