Carbon-supported PdSn SnO2 catalyst for ethanol electro-oxidation in alkaline media

被引：73
作者：
Mao, Hongmin [1 ]
Wang, Longlong [1 ]
Zhu, Pingping [1 ]
Xu, Qunjie [1 ]
Li, Qiaoxia [1 ]
机构：
[1] Shanghai Univ Elect Power, Coll Environm & Chem Engn, Shanghai 200090, Peoples R China
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 31期
基金：
美国国家科学基金会;
关键词：
PdSn-SnO2/C; Ethanol oxidation; Alkaline solution; Fuel cell; PLATINUM-BASED ANODES; FUEL-CELLS; METHANOL OXIDATION; FORMIC-ACID; TIN OXIDE; ELECTROCATALYSTS; ELECTRODE; SPECTROSCOPY; PERFORMANCE; REDUCTION;
D O I：
10.1016/j.ijhydene.2014.08.079
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Carbon-supported PdSn-SnO2 with high electrical catalytic activity for ethanol oxidation in alkaline solution was synthesized using an impregnation reduction method. XRD analysis of the as-prepared PdSn-SnO2/C revealed that the Pd diffraction peaks shifted to lower 20 values with respect to the corresponding peaks of the Pd/C catalyst, indicating that Sn doping could shrink the Pd crystalline lattice. XPS measurements confirmed the existence of Sn and SnO2 in the PdSn-SnO2/C catalysts. The prepared PdSn-SnO2/C catalysts presented a remarkably higher electrocatalytic activity than that of the Pd-Sn/C and Pd/C catalysts. This was mainly because the easy adsorption-dissociation of OHads over the SnO2 surface changed the electronic effect and accelerated the adsorption of ethanol on the surface of Pd, thus enhancing the overall ethanol oxidation kinetics and contributing to a significant improvement in the catalytic activity. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：17583 / 17588
页数：6
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