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] Taiyuan Univ Technol, Res Inst Surface Engn, Lab Adv Mat & Energy Electr 更多
通讯作者地址：[Wang, XG]Taiyuan Univ Technol, Res Inst Surface Engn, Lab Adv Mat & Energy Electrochem, Taiyuan 030024, Peoples R China.
来源：JOURNAL OF COLLOID AND INTERFACE SCIENCE
关键词：Palladium-tin; Platinum; Electro-oxidation; Ethanol; Alkali and acid
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 NaBH4 as 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. (C) 2016 Elsevier Inc. All rights reserved.