Particle size effects of sulfonated graphene supported Pt nanoparticles on ethanol electrooxidation

被引：45
作者：
Sun, Chia-Liang [1 ,2 ]
Tang, Jui-Shiang [1 ]
Brazeau, Nicolas [3 ]
Wu, Jhing-Jhou [1 ]
Ntais, Spyridon [3 ]
Yin, Chung-Wei [1 ]
Chou, Hung-Lung [4 ]
Baranova, Elena A. [1 ,3 ]
机构：
[1] Chang Gung Univ, Dept Chem & Mat Engn, Taoyuan 333, Taiwan
[2] Chang Gung Univ, Portable Energy Syst Grp, Green Technol Res Ctr, Taoyuan 333, Taiwan
[3] Univ Ottawa, Dept Chem & Biol Engn, Ottawa, ON K1N 6N5, Canada
[4] Natl Taiwan Univ Sci & Technol, Grad Inst Appl Sci & Technol, Taipei 106, Taiwan
来源：
ELECTROCHIMICA ACTA | 2015年 / 162卷
关键词：
particle size effect; graphene; Pt nanoparticle; ethanol oxidation reaction; fuel cell; METHANOL OXIDATION REACTION; DENSITY-FUNCTIONAL THEORY; WALLED CARBON NANOTUBES; HIGH-SURFACE-AREA; PLATINUM NANOPARTICLES; FUEL-CELLS; ELECTROCHEMICAL PERFORMANCE; ELECTROCATALYTIC OXIDATION; CO ELECTROOXIDATION; OXYGEN REDUCTION;
D O I：
10.1016/j.electacta.2014.12.099
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
Fuel cells are promising alternative in automobile and stationary power generation. Direct ethanol fuel cells (DEFCs) offer significant advantages due to the non-toxicity and renewability of ethanol as well as its high power density. Development of the efficient catalysts for ethanol oxidation reaction (EOR) has attracted great attention and represents one of the major challenges in electrocatalysis. Graphene, one-atom thick nanocarbon materials, has attracted much attention recently in a variety of applications. The sulfonation of graphene is able to make it hydrophilic, which enhances its dispersibility in aqueous solvents. Furthermore, sulfonation increases the adsorption and uniform distribution of the Pt nanoparticles, which increases both the electrocatalytic activity and the durability. In this study, theoretical calculations demonstrated that the sulfonate functional group can donate charge to Pt, enhanced the adsorption energy of Pt, and then reduce the adsorption energy of CO on Pt. Then experimentally five kinds of Pt/sulfonated-graphene (Pt/sG) catalysts were synthesized via the control of pH values during the preparation of five-selected colloidal nanoparticles. Among all catalysts, Pt-sG (2.5 nm) has the highest peak current density in EOR. (C) 2014 Elsevier Ltd. All rights reserved.
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页码：282 / 289
页数：8
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