A novel N-doped carbon-based metal-free catalyst prepared and its oxygen reduction performance

被引:2
作者
机构
[1] School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong
来源
Liao, S.-J. (chsjliao@scut.edu.cn) | 1600年 / South China University of Technology卷 / 40期
关键词
Melamine; Oxygen reduction reaction; Platinum-free catalyst; Polyaniline;
D O I
10.3969/j.issn.1000-565X.2012.10.017
中图分类号
学科分类号
摘要
In Ar atmosphere, a novel N-doped carbon-based metal-free catalyst for the cathodic oxygen reduction reaction (ORR) in fuel cells was prepared via the high-temperature carbonization of the hybrid precursors of melamine and polyaniline. Then, the effects of such factors as the precursors and the carbonization temperature on the catalyst performance were discussed, and the catalyst was characterized by means of XRD, TEM, DSC-TGA, Raman spectroscopy and FT-IR. The results show that (1) the optimal carbonization temperature is 900°C; (2) the process with the pyrolysis twice and with the acid treatment once benefits the enhancement of the catalyst activity; and (3) the catalyst is of excellent electrochemical activity and stability in the electrolyte with 0.1mol/L of HClO4, that is, after 10000 voltammetry circles, its electrochemical activity does not decrease but increases, with a half-wave potential of ORR of 0.42V (vs. Ag/AgCl) and a limited diffusion current nearly equal to that of the state-of-the-art Pt/C catalyst. In addition, it is found from Koutecky-Levich plots that the oxygen reduction on the catalyst is controlled by the four-electron transfer mechanism.
引用
收藏
页码:121 / 127
页数:6
相关论文
共 18 条
[11]  
Li X., Liu G., Popov B.N., Activity and stability of non-precious metal catalysts for oxygen reduction in acid and alkaline electrolytes, Journal of Power Sources, 195, 19, pp. 6373-6378, (2010)
[12]  
Xin H., Lin C., Xu W.P., Et al., Structural properties of carbon nitride films prepared by high dose nitrogen implantation into carbon thin films, Journal of Applied Physics, 79, 5, pp. 2364-2368, (1996)
[13]  
Smith J.A., Rosser K.N., Yagi H., Et al., Diamond deposition in a DC-arc Jet CVD system: investigations of the effects of nitrogen addition, Diamond and Related Materials, 10, 3-7, pp. 370-375, (2001)
[14]  
Liu G., Li X., Ganesan P., Et al., Development of non-precious metal oxygen-reduction catalysts for PEM fuel cells based on N-doped ordered porous carbon, Applied Catalysis B: Environmental, 93, 1-2, pp. 156-165, (2009)
[15]  
Wu G., Nelson M.A., Mack N.H., Et al., Titanium dioxide-supported non-precious metal oxygen reduction electrocatalyst, Chemical Communications, 46, 40, pp. 7489-7491, (2010)
[16]  
Bezerra C.W.B., Zhang L., Liu H., Et al., A review of heat-treatment effects on activity and stability of PEM fuel cell catalysts for oxygen reduction reaction, Journal of Power Sources, 173, 2, pp. 891-908, (2007)
[17]  
Fellinger T.P., Hasche F., Strasser P., Et al., Mesoporous nitrogen-doped carbon for the electrocatalytic synthesis of hydrogen peroxide, Journal of the American Chemical Society, 134, 9, pp. 4072-4075, (2012)
[18]  
Markovi N.M., Gasteiger H.A., Grgur B.N., Et al., Oxygen reduction reaction on Pt(111): effects of bromide, Journal of Electroanalytical Chemistry, 467, 1-2, pp. 157-163, (1999)