Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7719974 | International Journal of Hydrogen Energy | 2014 | 7 Pages |
Abstract
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 364.7Â m2Â gâ1 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 (20Â wt%).
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Huijuan Yang, Hui Wang, Shan Ji, Vladimir Linkov, Rongfang Wang,