Lianbang Wang Guobin Wu Zhenzhen Yang Yunfang Gao Xinbiao Mao Chun'an May
材料科学技术（英文）
Fuel cells using borohydride as the fuel have received much attention because of high energy density and theoretical working potential. In this work, LaNi4.5Al0.5 hydrogen storage alloy used as the anodic material has been investigated. It was found that the increasing operation temperature was helpful to the open-circuit potential, the discharge potential and the power density, but showed a negative effect on the utilization of the fuel due to the accelerated hydrogen evolution. The high KOH concentration was favorable for high-rate discharge capability. The adsorption and transformation of hydrogen on LaNi4.5Al0.5 alloy electrode has been observed, but its contribution to the discharge capability during a high-rate discharge was small.
关键词:
Fuel cell
,
硼氢化物
,
阳极催化剂
,
储氢合金
Lianbang Wang Guobin Wu Zhenzhen Yang Yunfang Gao Xinbiao Mao Chun'an May
材料科学技术（英文）
Fuel cells using borohydride as the fuel have received much attention because of high energy density and theoretical working potential. In this work, LaNi4.5Al0.5 hydrogen storage alloy used as the anodic material has been investigated. It was found that the increasing operation temperature was helpful to the open-circuit potential, the discharge potential and the power density, but showed a negative effect on the utilization of the fuel due to the accelerated hydrogen evolution. The high KOH concentration was favorable for high-rate discharge capability. The adsorption and transformation of hydrogen on LaNi4.5Al0.5 alloy electrode has been observed, but its contribution to the discharge capability during a high-rate discharge was small.
关键词:
Fuel cell
,
硼氢化物
,
阳极催化剂
,
储氢合金
杨子芹
,
赵鹏程
,
谢自立
新型炭材料
采用金溶胶负载法分别在CNTs、Vxc-72R炭黑和ECP 600JD科琴炭黑上负载了平均粒径约为5.0nm且尺寸分布均匀的纳米金颗粒,考察了酸处理对炭载体的影响及不同Au/C催化剂对BH4-电催化活性的影响.结果显示:经过酸处理三种炭载体的表面亲水性提高,其中CNTs的BET比表面积提高,而Vxc-72R和ECP 600JD的BET比表面积降低.炭载体负载纳米Au的能力与其BET比表面积密切相关.对炭载体进行酸处理可大幅度提高Au/C催化剂对BH4-的电催化性能,其中金负载在经酸处理的ECP 600JD炭黑上显示出最佳的电催化性能.
关键词:
金溶胶
,
纳米金
,
硼氢化物
,
燃料电池
,
电催化剂
袁福根
,
朱雪华
稀土
doi:10.3969/j.issn.1004-0277.2009.01.022
合成了三类稀土硼氢化合物Ln(BH4)3(THF)3[Ln=Er(1),Yb(2)]、[(Me3Si)2NC(NCy)2]Ln(BH4)2(THF)2[Cy=C6H11,Ln=Er(3),Yb(4)]和(ArO)Ln(BH4)2(THF)2[Ar=C6H2-2,4,6-t-Bu3,Ln=Er(5),Yb(6)],首次研究了它们催化环氧环己烷(CHO)开环聚合的性能.其活性顺序为5～6＞1～3＞2＞4,说明吸电性配体以及Lewis酸性较大的稀土元素对金属硼氢化物催化聚合活性是有利的.温度越高,催化剂催化活性越好.聚合物分子量在1万左右,分子量分布在2.2左右.
关键词:
稀土
,
硼氢化物
,
环氧环己烷
,
聚合
张静
,
白晨光
,
潘复生
,
罗晓东
兵器材料科学与工程
doi:10.3969/j.issn.1004-244X.2008.06.025
配位氢化物是现有储氢材料中体积储氢密度和质量储氢密度最高的,近年来引起广泛关注.介绍配位氢化物的形成、性质、种类和特点,综述近期的研究成果和开发现状,总结存在的问题,并提出今后的研究方向和发展趋势.
关键词:
配位氢化物
,
储氢材料
,
综述
,
铝氢化物
,
硼氢化物
