花瓣状镍铜磷化物纳米材料的制备及其电催化析氢性能研究
首发时间:2018-05-21
摘要:本文分别以硝酸镍、硝酸铜作为Ni源和Cu源,通过水热和磷化处理制备了Cu-NiPx催化剂。利用场发射扫描电镜、X射线衍射仪、X射线光电子能谱对催化剂的形貌、组成进行了表征;利用线性扫描伏安法、电化学阻抗谱、计时电位法等考察了催化剂在0.5 M H2SO4中的析氢催化活性和稳定性。结果表明,Cu-NiPx催化剂具有优异的电催化析氢活性,- 10 mA cm-2电流密度下的过电位为128 mV,- 100 mA cm-2电流密度下的过电位为228 mV,Tafel斜率为78.5 mV dec-1。Cdl为17 mF cm-2,Rct 为3.30 Ω。
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Preparation and performance of petal-like nickel copper phosphide nanomaterials for eletrocatalytic hydrogen evolution
Abstract:Cu-NiPx catalyst is prepared by the method of hydrothermal and phosphating treatment using nickel nitrate and copper nitrate as Ni source and Cu source. Morphology and composition of the catalysts are characterized by field emission scanning electron microscopy, X-ray diffractometry and X-ray photoelectron spectroscopy. Catalytic activity and stability of the catalyst in 0.5 M H2SO4 are investigated by linear scanning voltammetry, electrochemical impedance spectroscopy and chronopotentiometry. The results show that the electrocatalytic activity of Cu-NiPx catalyst is excellent. The overpotential at the current density of - 10 mA cm-2 is 128 mV, the overpotential at the current density of - 100 mA cm-2 is 228 mV and the Tafel slope is 78.5 mV dec-1.Cdl is 17 mF cm-2 and Rct is 3.30 Ω.
Keywords: Electrocatalysis hydrogen evolution reaction hydrothermal phosphating
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花瓣状镍铜磷化物纳米材料的制备及其电催化析氢性能研究
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