Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 468, Issue -, Pages 200-210Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.01.068
Keywords
Palladium-tin; Platinum; Electro-oxidation; Ethanol; Alkali and acid
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Funding
- National Natural Science Foundation of China [51201113]
- Natural Science Youth Foundation of Shanxi Province [2013021011-4]
- 51st China Postdoctoral Science Foundation [2012M510781]
- Program for Distinguished Young Talents Cultivation from Taiyuan University of Technology [tyut-2013Y010]
- Talents Introduction Fund from Taiyuan University of Technology [tyut-rc201115a]
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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.
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