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Hydrogen Generation on NaBH4 Catalyzed by Co-B/Rare Earth Oxides
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Hydrogen Generation on NaBH4 Catalyzed by Co-B/Rare Earth Oxides
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National Natural Science Foundation of China（50806007）and Fundamental Research Funds for the Central Universities Project (CHD2010ZY015)

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    摘要:

    研究了催化物體系Co2B/稀土氧化物對NaBH4 放氫性能的影響。結(jié)果顯示，摻雜Co-B/CeO2 和Co2B/Sm2O3明顯增加了NaBH4的放氫量，在所有的摻雜試樣中，摻雜 Co2B:CeO2 比例為1:1混合催化劑的試樣具有最大放氫量274 mL。然而，摻雜混合催化劑試樣放氫速率的研究顯示，摻雜系統(tǒng)混合催化劑使得NaBH4的放氫速率明顯下降。此外，摻雜試樣的微觀結(jié)構(gòu)研究顯示，與摻雜Co2B的試樣相比，摻雜混合催化劑試樣的微觀結(jié)構(gòu)更加松散。Co2B/CeO2催化劑的研究發(fā)現(xiàn)，多孔狀的微觀結(jié)構(gòu)對提高NaBH4放氫量是有益的，但是，對 Co2B/La2O3和 Co2B/Sm2O3 等催化劑的研究結(jié)果顯示，微觀結(jié)構(gòu)中的多孔結(jié)構(gòu)與NaBH4放氫量沒有直接關(guān)系

    Abstract:

    The effect of catalyst systems Co2B/rare earth oxides on the properties of hydrogen generation of NaBH4 was studied. The results show that doping with Co2B/CeO2 and Co2B/Sm2O3 increases the amount of hydrogen generation of NaBH4 obviously. Among all samples, the sample doped with Co2B/CeO2 with ratio of 1:1 has the largest amount of hydrogen release reaching about 274 mL. However, the investigation on the rate of hydrogen release indicates that doping with Co2B/rare earth oxides decreases the rate of hydrogen release obviously. Furthermore, the analysis on the microstructures of the reaction products of the samples doped with Co2B/rare earth oxides shows that, doping with Co2B/rare earth oxides makes the microstructures of the reaction products looser compared with doping with Co2B. Significantly, the investigation on doping with Co2B/CeO2 shows that the porous structure is helpful for improving the amount of hydrogen generation. However, the investigation on the samples doped with Co2B/La2O3 and Co2B/ Sm2O3 indicates that there is no direct relationship between the amount of hydrogen generation and the porous structure

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溫久然,魏軍從,耿 飛,鄭雪萍,劉開平. Hydrogen Generation on NaBH4 Catalyzed by Co-B/Rare Earth Oxides[J].稀有金屬材料與工程,2014,43(3):575~578.[Wen Jiuran, Wei Juncong, Geng Fei, Zheng Xueping, Liu Kaiping. Hydrogen Generation on NaBH4 Catalyzed by Co-B/Rare Earth Oxides[J]. Rare Metal Materials and Engineering,2014,43(3):575~578.]
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  • 收稿日期:2013-03-20
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  • 在線發(fā)布日期: 2014-06-27
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