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首页> 外文期刊>Electrochimica Acta >An electrochemical method to prepare of Pd/Cu2O/MWCNT nanostructure as an anode electrocatalyst for alkaline direct ethanol fuel cells
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An electrochemical method to prepare of Pd/Cu2O/MWCNT nanostructure as an anode electrocatalyst for alkaline direct ethanol fuel cells

机译：一种电化学方法制备Pd / Cu2O / MWCNT纳米结构作为碱性直接乙醇燃料电池的阳极电催化剂

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This study reports an electrochemical method to fabrication of palladium nanoparticles (Pd NPs) promoted with cuprous oxide (Cu2O) supported on multi-walled carbon nanotube (Pd/Cu2O/MWCNT). First, Cu2O is electrodeposited on treated MWCNTs in the optimum deposition conditions. Then, the Pd nanostructure is electrochemically fabricated on Cu2O/MWCNT electrode by cycling the potential between +0.5 to -1.0 V in negative direction. The prepared electrodes are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) and transmission electron microscopy (TEM). The electrocatalytic performance of Pd/Cu2O/MWCNT electrocatalyst for ethanol oxidation reaction (EOR) is investigated by cyclic voltammetric (CV), electrochemical impedance spectroscopy (EIS), and chronoamperometry (CA) measurements. The formation of the Pd/Cu2O/MWCNT is confirmed by EDX and XRD techniques. The onset potential of Pd/Cu2O/MWCNT shifts to negative values by 120 mV compared to the onset potential of Pd/MWCNT. Much higher If/Ib value is obtained for Pd/Cu2O/MWCNT compared to other Pd-based catalysts indicating Cu2O could significantly enhance the stability and CO poisoning tolerance of the Pd towards ethanol electrooxidation. The results revealed that the prepared Pd/Cu2O/MWCNT catalyst can be a promising anode catalyst for alkaline direct ethanol fuel cells. (C) 2016 Elsevier Ltd. All rights reserved.
机译：这项研究报告了电化学方法来制备钯纳米颗粒（Pd NPs），其由负载在多壁碳纳米管（Pd / Cu2O / MWCNT）上的氧化亚铜（Cu2O）促进。首先，在最佳沉积条件下，将Cu2O电沉积在处理过的MWCNT上。然后，通过在负方向上使电势在+0.5到-1.0 V之间循环，在Cu2O / MWCNT电极上电化学制备Pd纳米结构。制备的电极通过X射线衍射（XRD），扫描电子显微镜（SEM），能量色散X射线光谱（EDX）和透射电子显微镜（TEM）进行表征。通过循环伏安法（CV），电化学阻抗谱（EIS）和计时电流法（CA）测量研究了Pd / Cu2O / MWCNT电催化剂对乙醇氧化反应（EOR）的电催化性能。通过EDX和XRD技术证实了Pd / Cu 2 O / MWCNT的形成。与Pd / MWCNT的起始电位相比，Pd / Cu2O / MWCNT的起始电位偏移了负值120 mV。与其他基于Pd的催化剂相比，Pd / Cu2O / MWCNT的If / Ib值高得多，表明Cu2O可以显着提高Pd对乙醇电氧化的稳定性和CO中毒耐受性。结果表明，制备的Pd / Cu2O / MWCNT催化剂可以作为碱性直接乙醇燃料电池的有前景的阳极催化剂。 （C）2016 Elsevier Ltd.保留所有权利。

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