High activity of carbon nanotubes supported binary and ternary Pd-based catalysts for methanol, ethanol and formic acid electro-oxidation
作者： Fuchun Zhu , Guanshui Ma , Zhongchao Bai , Ruiqiang Hang , Bin Tang
DOI: 10.1016/J.JPOWSOUR.2013.05.145
关键词: Catalysis 、 Reducing agent 、 Electrocatalyst 、 Inorganic chemistry 、 Cyclic voltammetry 、 Chronoamperometry 、 Chemistry 、 Methanol 、 Carbon nanotube 、 Formic acid
摘要: Abstract In this study, we have synthesized a series of multi-walled carbon nanotubes supported Pd, PdCu(molar ratio 1:1), PdSn(1:1) and PdCuSn(1:1:1) catalysts by chemical reduction with NaBH4 as reducing agent. These are characterized using X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, photoelectron spectroscopy (XPS), cyclic voltammetry chronoamperometry. During the potential cycling activation, it is found that additive Cu prone to suffer leaching while dissolution Sn rarely occurs. Electrochemical measurements demonstrate that, co-alloying Pd can trigger best catalytic activity enhancement compared binary PdCu/CNTs, PdSn/CNTs mono-component Pd/CNTs catalysts. The PdCuSn/CNTs reveals most excellent activities toward methanol, ethanol formic acid electro-oxidation corresponding mass attain 395.94, 872.70 534.83 mA mg−1 respectively. possible promotion effect or/and on electrocatalytic improvement also analyzed.
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