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高溫水蒸氣毒化對鈀膜表面狀態(tài)與滲氘能力的影響
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表面物理與化學(xué)國家重點實驗室開放基金（SPC200701）


Effect of Water Vapour Poison on the Surface Condition and Deuterium Permeability of Palladium Membrane
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    摘要:

    采用H2O（g）在300 ℃與900 ℃之間對Pd膜表面進行了毒化，將毒化后的Pd膜在常溫下與氫氣進行反應(yīng)，并在500 ℃進行了氘氣滲透試驗。采用XPS、SEM等對反應(yīng)前后Pd膜表面狀態(tài)進行了表征與分析，研究了H2O(g)的毒化作用與吸氫反應(yīng)對Pd膜表面形貌與化學(xué)成分的影響與機理。實驗表明：當毒化溫度低于500 ℃時，H2O(g)對Pd膜表面無明顯影響；當毒化溫度高于500 ℃，H2O(g)會導(dǎo)致Pd膜表面出現(xiàn)微孔，且隨著毒化溫度升高，微孔數(shù)量與體積逐漸增加；當溫度達到600 ℃以上時，H2O(g)毒化會造成Pd膜表面出現(xiàn)細微裂紋。H2O(g)與Pd膜在300 ℃與900 ℃之間不但不會產(chǎn)生化學(xué)變化，其表面原有的吸附雜質(zhì)反而得到了明顯的去除，且在600 ℃以上反應(yīng)后鈀膜的透氘性能也得到了提高。

    Abstract:

    The poison of palladium membrane in H2O (gas) and the hydrogenization of the poisoned membrane were proceeded in a silica tubular furnace. The hydrogen isotope permeation capacity of palladium membrane was tested. The variation of palladium membrane phase was analyzed by XPS and SEM. The causes and the mechanism of the variation were discussed. The results show that the content of adsorptive C and O on the palladium surface can be decreased by the reaction between H2O (gas) and palladium surface without variation of chemical state. Some cracks can be observed on the palladium surface at a higher reaction temperature, which account for a physical change. At room temperature, there are no obvious changes on the palladium surface after the palladium membrane deoxidized again by H2. The deuterium permeability of Pd membrane which has reacted with H2O (gas) is higher than the original membrane. The improvement of deuterium permeability could be ascribed to the improving surface cleanness caused by the reaction between H2O (gas) and palladium surface.

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馮 威,劉 穎,連利仙,彭麗霞,董志紅.高溫水蒸氣毒化對鈀膜表面狀態(tài)與滲氘能力的影響[J].稀有金屬材料與工程,2013,42(4):797~800.[Feng Wei, Liu Ying, Lian Lixian, Peng Lixia, Dong Zhihong. Effect of Water Vapour Poison on the Surface Condition and Deuterium Permeability of Palladium Membrane[J]. Rare Metal Materials and Engineering,2013,42(4):797~800.]
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  • 收稿日期:2012-04-29
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