Tb promoted Pd/C catalysts for the electrooxidation of ethanol in alkaline media

被引：35
|
作者：
Nguyen, Son Truong [1 ]
Tan, Delphine Si Ling [1 ]
Lee, Jong-Min [1 ]
Chan, Siew Hwa [2 ]
Wang, Jing Yuan [3 ]
Wang, Xin [1 ]
机构：
[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Sch Mech & Aerosp Engn, Singapore 639798, Singapore
[3] Nanyang Technol Univ, Residues & Resource Reclamat Ctr, Singapore 639798, Singapore
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 16期
基金：
新加坡国家研究基金会;
关键词：
Ethanol oxidation; Palladium; Terbium; Rare-earth; Alkaline fuel cell; Direct ethanol fuel cell; ALCOHOL OXIDATION; OXYGEN REDUCTION; ELECTROCATALYSTS; PLATINUM; PALLADIUM; OXIDE; CERIA;
D O I：
10.1016/j.ijhydene.2011.05.049
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：
Various Pd-Tb/C electrocatalysts with different Pd/Tb ratios were synthesized and tested for ethanol oxidation in alkaline media. The structure and morphology of the nanocatalysts were investigated using X-ray diffraction and transmission electron microscopy. The data showed that face-centered cubic structures were formed for all the Pd-Tb/C catalysts and a well dispersion of nanoparticles on carbon black was observed. The electrocatalytic properties of the catalysts for ethanol oxidation in alkaline solution were tested by cyclic voltammetry, linear sweep voltammetry and chronoamperometry techniques. It was found that Pd-Tb/C catalysts have higher activity and durability for ethanol oxidation than Pd/C. This may be attributed to the promotion effect of Tb on OH- adsorption. The highest performance was observed for 10%Pd-2%Tb/C in terms of the highest activity, stability and lowest activation energy for ethanol oxidation. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：9645 / 9652
页数：8
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