通过催化裂解法制备了碳纳米管,对其进行氧化处理后,在其表面沉积了分布均匀、尺寸呈纳米级的铂和铂/钌颗粒.实验结果表明,当采用碳纳米管沉积铂为催化剂时,质子交换膜燃料电池的催化剂铂很容易受CO的毒化而失去活性,从而使电池的电压随电流密度的降低而迅速降低;当采用碳纳米管沉积铂/钌为催化剂时,钌能够使铂表面吸附的CO被氧化为CO2,增加催化剂对CO的抵抗能力,使燃料电池的性能提高.
Carbon nanotubes prepared by a catalytic pyrolysis method were oxidized and homogeneously deposited with Pt and
Pt/Ru nanoparticles on their surfaces. The experimental results show that the catalysts of Pt deposited on carbon nanotubes of the proton exchange
membrane fuel cell are easily poisoned by CO and lose their activity, which make the fuel cell voltage decrease sharply with decreasing of
current density. But their ability to resist CO poisoning improves when Pt/Ru deposited on carbon nanotubes as catalysts, this
suggests that Ru can oxidize CO adsorbed on the surfaces of Pt into CO2, so the catalyst ability to resist CO poisoning increases.
参考文献
| [1] | 黄倬, 屠海令, 张翼强, 等. 质子交换膜燃料电池的研究开发与应用, 第一版. 北京: 冶金工业出版社, 2000. [2] Chen J F, Xu C L, Mao Z Q, et al. Science in China A, 2001, 45 (1): 82--86. [3] Iijima S. Nature, 1991, 354: 56--58. [4] Jin L, Bower C, Zhou O. Appl. Phys. Lett., 1998, 73: 1197--1199. [5] Wang Q H, Setlur A A, Lauerhaas J M. Appl. Phys. Lett., 1998, 72: 2912--2913. [6] Dillon A C, Jones K M, Bekkedahl T A. Nature, 1997, 386: 377--379. [7] Dai H J, Hafner J H, Rinzler A G, et al. Nature, 1996, 384: 147--150. [8] Li Y H, Wang S G, Wei J Q, et al. Chemical Physics Letters, 2002, 357 (3-4): 263--266. [9] 王晓峰, 王大志, 梁吉(WANG Xiao-Feng, et al). 无机材料学报(Journal of Inorganic Materials), 2003, 18 (2): 331--336. [10] Che G, Lakshmi B B, Fisher R E. Nature, 1998, 393: 346--349. [11] 田立朋, 李伟善. 现代化工, 1998, 5: 14--17. |
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