采用H2O(g)在300℃与900℃之间对Pd膜表面进行了毒化,将毒化后的Pd膜在常温下与氢气进行反应,并在500℃进行了氘气渗透试验.采用XPS、SEM等对反应前后Pd膜表面状态进行了表征与分析,研究了H2O(g)的毒化作用与吸氢反应对Pd膜表面形貌与化学成分的影响与机理.实验表明:当毒化温度低于500℃时,H2O(g)对Pd膜表面无明显影响;当毒化温度高于500℃,H2O(g)会导致Pd膜表面出现微孔,且随着毒化温度升高,微孔数量与体积逐渐增加;当温度达到600℃以上时,H2O(g)毒化会造成Pd膜表面出现细微裂纹.H2O(g)与Pd膜在300℃与900℃之间不但不会产生化学变化,其表面原有的吸附杂质反而得到了明显的去除,且在600℃以上反应后钯膜的透氘性能也得到了提高.
参考文献
| [1] | 唐涛,陆光达.钯-氢体系的物理化学性质[J].稀有金属,2003(02):278-285. |
| [2] | 杨瑞鹏,蔡王珣,陈秋龙.氢在钯纳米晶薄膜中的扩散[J].中国有色金属学报,2001(04):558-561. |
| [3] | 陆光达 .[J].同位素,2003,16(2-4):232. |
| [4] | 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. |
| [5] | Westerstr(o)m R;Weststrate C J;Resta A et al.[J].Surface Science,2008,602(14):2440. |
| [6] | Wang J;Yun Y;Altman EI .The plasma oxidation of Pd(100)[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2007(16):3497-3505. |
| [7] | Titkov AI;Salanov AN;Koscheev SV;Boronin AI .Mechanisms of Pd(110) surface reconstruction and oxidation: XPS, LEED and TDS study[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2006(18):4119-4125. |
| [8] | Davenport J W;Dienes G J;Johnson R A .[J].Physical Review B,1982,25(04):2165. |
| [9] | Sun Xiyuan;Kong Fanjie et al.[J].Acta Physico-Chimica Sinica,2007,23(05):651. |
| [10] | George Karagiannakis;Stergios Zisekas;Christos Kokkofitis;Michael Stoukides .Effect of H_2O presence on the propane decomposition reaction over Pd in a proton conducting membrane reactor[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2006(2):265-271. |
| [11] | Cao Yilin;Chen Zhaoxu .[J].Surface Science,2006,600(19):4572. |
| [12] | Christos Kokkofitis;Michael Stoukides .[J].Journal of Molecular Catalysis,1994,94(02):173. |
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