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LaCl3和Ti對氫化鋁鈉（NaAlH4）和氫化鋁鋰（LiAlH4）儲(chǔ)氫性能的影響
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Effect of LaCl3 and Ti on Hydrogen Storage Properties of NaAlH4 and LiAlH4
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Supported by the National Natural Science Foundation of China (50806007)

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    摘要:

    通過PCT(pressure-content-temperature)設(shè)備研究催化劑Ti和 LaCl3對NaAlH4和LiAlH4儲(chǔ)氫性能的影響。NaAlH4和LiAlH4摻雜LaCl3比摻雜Ti的放氫性能有明顯提高。在吸氫性能的研究中發(fā)現(xiàn)，在第1個(gè)吸氫循環(huán)中，摻雜3 mol% LaCl3的NaAlH4試樣的放氫溫度明顯降低。此外，LaCl3的摩爾含量對NaAlH4的放氫性能的影響是非常明顯的。研究結(jié)果顯示，隨著LaCl3含量的增加，NaAlH4的放氫量和放氫速率顯示出相同的變化趨勢，即先增加后減少。其中

    Abstract:

    The effects of additives Ti and LaCl3 on the hydrogen storage properties of NaAlH4 and LiAlH4 were investigated by the PCT (pressure-content-temperature) apparatus. NaAlH4 doped with LaCl3 and LiAlH4 doped with LaCl3 both show better capability of hydrogen release than the samples doped with Ti. The study on the first rehydrogenation cycle of NaAlH4 doped with 3 mol% LaCl3 finds that the dehydrogenation temperature has a marked decrease. In addition, the effect of LaCl3 content on hydrogen release of NaAlH4 is very obvious. The result indicates that the amount and rate of hydrogen release show the same change trends, increasing firstly and then decreasing with increasing of LaCl3 content. The sample doped with 3 mol% LaCl3 presents the best dehydrogenation properties in both the amount of hydrogen release and the desorption kinetics. The activation energy of the NaAlH4 sample doped with 3 mol% LaCl3 was measured to be 41.6 kJ/mol. This value is lower than that reported for the Ti-doped NaAlH4.

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鄭雪萍,劉勝林. LaCl3和Ti對氫化鋁鈉（NaAlH4）和氫化鋁鋰（LiAlH4）儲(chǔ)氫性能的影響[J].稀有金屬材料與工程,2009,38(8):1328~1332.[Zheng Xueping, Liu Shenglin. Effect of LaCl3 and Ti on Hydrogen Storage Properties of NaAlH4 and LiAlH4[J]. Rare Metal Materials and Engineering,2009,38(8):1328~1332.]
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  • 收稿日期:2009-09-22
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