Co-B/稀土氧化物催化NaBH_4的制氢研究（英文）  

Hydrogen Generation on NaBH_4 Catalyzed by Co-B/Rare Earth Oxides

作　　者：温久然[1] 魏军从[2] 耿飞[1] 郑雪萍[1] 刘开平[1] 

机构地区：[1]长安大学,陕西西安710061 [2]河北联合大学,河北唐山063009

出　　处：《稀有金属材料与工程》2014年第3期575-578,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50806007);Fundamental Research Funds for the Central Universities Project(CHD2010ZY015)

摘　　要：研究了催化物体系Co2B/稀土氧化物对NaBH4放氢性能的影响。结果显示,掺杂Co-B/CeO2和Co2B/Sm2O3明显增加了NaBH4的放氢量,在所有的掺杂试样中,掺杂Co2B:CeO2比例为1:1混合催化剂的试样具有最大放氢量274 mL。然而,掺杂混合催化剂试样放氢速率的研究显示,掺杂系统混合催化剂使得NaBH4的放氢速率明显下降。此外,掺杂试样的微观结构研究显示,与掺杂Co2B的试样相比,掺杂混合催化剂试样的微观结构更加松散。Co2B/CeO2催化剂的研究发现,多孔状的微观结构对提高NaBH4放氢量是有益的,但是,对Co2B/La2O3和Co2B/Sm2O3等催化剂的研究结果显示,微观结构中的多孔结构与NaBH4放氢量没有直接关系。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/Sm203 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/La203 and CO2B/Sm203 indicates that there is no direct relationship between the amount of hydrogen generation and the porous structure.

关 键 词：NABH4 放氢 催化剂体系 多孔结构 

分 类 号：TQ116.2[化学工程—无机化工]