标题：Highly active carbon supported ternary PdSnPtx(x = 0.1-0.7) catalysts for ethanol electro-oxidation in alkaline and acid media
作者：Wang, Xiaoguang ;Zhu, Fuchun ;He, Yongwei ;Wang, Mei ;Zhang, Zhonghua ;Ma, Zizai ;Li, Ruixue
作者机构：[Wang, Xiaoguang ;Zhu, Fuchun ;He, Yongwei ;Wang, Mei ;Ma, Zizai ;Li, Ruixue ] Laboratory of Advanced Materials and Energy Electrochemistry, Research 更多
来源：Journal of Colloid and Interface Science
摘要：A series of trimetallic PdSnPtx(x = 0.1-0.7)/C catalysts with varied Pt content have been synthesized by co-reduction method using NaBH4as a reducing agent. These catalysts were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), cyclic voltammetry (CV) and chronoamperometry (CA). The electrochemical results show that, after adding a minor amount of Pt dopant, the resultant PdSnPtx/C demonstrated more superior catalytic performance toward ethanol oxidation as compared with that of mono-/bi-metallic Pd/C or PdSn/C in alkaline solution and the PdSnPt0.2/C with optimal molar ratio reached the best. In acid solution, the PdSnPt0.2/C also depicted a superior catalytic activity relative to the commercial Pt/C catalyst. The possible enhanced synergistic effect between Pd, Sn/Sn(O) and Pt in an alloyed state should be responsible for the as-revealed superior ethanol electro-oxidation performance based upon the beneficial electronic effect and bi-functional mechanism. It implies the trimetallic PdSnPt0.2/C with a low Pt content has a promising prospect as anodic electrocatalyst in fields of alkali- and acid-type direct ethanol fuel cells.
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