在300K和0～13.3 kPa压力范围内,测量了海绵钯表面对CO、o2、CH4的吸附等温线.结果表明:钯表面对CO的吸附量先随压力的升高而增加,之后呈现饱和吸附状态;对O2的吸附至少可以分3个区间,在0～100 Pa压力区间,吸附量随压力升高快速增加,此后直至4kPa的区间内,吸附量随压力升高较缓慢增加,但当压力高于4kPa时,吸附量随压力的升高而增加又变得较为显著:CH4的吸附量相对较小,并持续随压力升高而缓慢增加.在整个压力测量区间,CO、CH4的吸附等温线符合兰缪尔模型,而O2的吸附等温线只在压力小于1.33 kPa的区间才符合.
参考文献
| [1] | Rahkammaa-Tolonen K;Salmi T;Murzin D Yu et al.[J].Journal of Catalysis,2002,210:17. |
| [2] | Amandusson H.;Dannetun H.;Ekedahl LG. .The effect of CO and O-2 on hydrogen permeation through a palladium membrane[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2000(4):259-267. |
| [3] | Wang D;Clewley J D;Flanagan Ted B et al.[J].Journal of Alloys and Compounds,2004,374:158. |
| [4] | Richard I M.Principles of Adsorption and Reaction on Solid Surfaces[M].New York:A Wiley-Interscienee Publication,1993:150. |
| [5] | 王欲知.真空技术[M].Sichuan:People of Sichuan Press,1984 |
| [6] | Leisenberger FP.;Sock M.;Surnev S.;Ramsey MG.;Netzer FP. Klotzer B.;Hayek K.;Koller G. .Surface and subsurface oxygen on Pd(111)[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2000(2/3):380-393. |
| [7] | Riitta-Liisa Kuittinen;Kari Laasonen .[J].Chemical Physics,2005,314:19. |
| [8] | Wolter K.;Kuhlenbeck H.;Baumer M.;Freund HJ.;Seiferth O. .Infrared spectroscopic investigation of CO adsorbed on Pd aggregates deposited on an alumina model support[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,1998(2/3):190-198. |
| [9] | Koho W K;Szany J;Goodman D W et al.[J].Surface Science,1992,1612:278. |
| [10] | Kok G A;Noordermer A;Nienwenhuys B E et al.[J].Surface Science,1983,135:65. |
| [11] | 张桂凯;陆光达;陈虎翅 .[J].RARE METALS,2006,39:41. |
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