Synergy between isolated-Fe3O4 nanoparticles and CNx layers derived from lysine to improve the catalytic activity for oxygen reduction reaction

被引：24
作者：
Yang, Huijuan [1 ]
Wang, Hui [1 ]
Ji, Shan [2 ]
Linkov, Vladimir [2 ]
Wang, Rongfang [1 ]
机构：
[1] Northwest Normal Univ, Coll Chem & Chem Engn, Key Lab Ecoenvirom Related Polymer Mat, Lanzhou 730070, Peoples R China
[2] Univ Western Cape, South African Inst Adv Mat Chem, ZA-7535 Bellville, South Africa
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2014年 / 39卷 / 08期
基金：
中国国家自然科学基金;
关键词：
Iron oxide; Nitrogen-doped carbon; Lysine; Oxygen reduction reaction; METAL-FREE ELECTROCATALYST; PEM FUEL-CELLS; CARBON NANOTUBES; ALKALINE MEDIA; GRAPHENE; SUPPORT; PERFORMANCE; COMPOSITE;
D O I：
10.1016/j.ijhydene.2013.12.160
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：
In order to seek heterogeneous electrocatalyst with efficient catalytic activity for oxygen reduction reaction (ORR), Fe3O4-CNx composite reported in our previous work was studied as electrocatalyst for ORR and showed poor catalytic activity. To improve the catalytic activity, Fe3O4-CNx composite is modified by the CNx layers derived from lysine through pyrolysis. The physical characterization show that the coral-shaped morphology of the resultant composite (Fe3O4-CNx-Lys) is still retained, while the degree of its graphitic crystalline increases. Besides, Fe3O4-CNx-Lys has 364.7 m(2) g(-1) of surface area with hierarchical porous structure. Electrochemical tests show that the catalytic activity Fe3O4-CNx-Lys for ORR is not only higher than those Fe3O4-CNx, XC-72-Lys derived from lysine and XC-72 Vulcan carbon but also comparable to that of commercial Pt/C (20 wt%). Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3739 / 3745
页数：7
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