氢在多壁碳纳米管上的等量吸附热

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	氢在多壁碳纳米管上的等量吸附热
	郑青榕 ; 顾安忠 ; 蔡振雄 ; 廖海峰 ; 郑超瑜
刊名	http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=imiy200704010&dbcode=CJFQ&dbname=CJFQ2007
	2012-06-05 ; 2012-06-05
关键词	储氢吸附吸附热碳纳米材料 hydrogen storage adsorption adsorption heat carbon nanostructures O647.31
其他题名	Isosteric heat of hydrogen adsorption on multi-walled carbon nanotubes
中文摘要	为说明氢在多壁碳纳米管(MWCNTs)上所受吸附作用的强弱,文中基于氢和77 K氮的吸附数据,比较了由非局域密度泛函理论(NDFT)、等量吸附线和归一化等温线线性化确定的等量吸附热。结果表明,氢在MWCNTs上等量吸附热随温度变化且表现出在弱的能量不均匀表面吸附的特点,平均值约为3—4 kJ/mol;由77 K氮吸附等温线确定的孔大小分布(PSD)和比表面积影响NDFT计算初始吸附时的精度;在吸附量和吸附温度都较低时,等量吸附线标绘结果与归一化等温线线性化方程确定的等量吸附热之间的偏差较小,在200—290 K温度区间则与ND-FT计算结果更为接近。然而,当温度大于310 K时,3种方法计算结果间的偏差较大。; For studying the adsorptive performance of hydrogen molecules on carbon nanostructures,the isosteric heat of hydrogen adsorption on Multi-walled Carbon Nanotubes(MWCNTs) was determined by comparison of the results from Non-local Density Functional Theory(NDFT) calculation,adsorption isosteres and the linearized equation.The results show that the isosteric heat is in characteristic of the weak temperature dependence and the adsorption on an energy heterogeneous surface,the mean isosteric heat is about 3-4 kJ/mol.In a lower surface coverage region,the results from NDFT calculation deviate from those by adsorption isosteres;at 200-290 K,the results from adsorption isosteres are more comparable to those by NDFT calculation than those from the linearized equation.However,when temperature is above 310 K,the discrepancies among the calculation results by above mentioned approaches are considerable.; 【作者单位】集美大学轮机工程学院；上海交通大学制冷与低温工程研究所；集美大学轮机工程学院福建厦门361021；上海200030；福建厦门361021；【作者英文名】ZHENG Qing-rong1,GU An-zhong2,CAI Zhen-xiong1,LIAO Hai-feng1,ZHENG Chao-yu1(1.Institute of Marine Engineering,Jimei University,Xiamen 361021,Fujian Province,China;2.Institute of Refrigeration and Cryogenics,Shanghai Jiao Tong University,Shanghai 2000
语种	中文
内容类型	期刊论文
源URL	[http://ir.calis.edu.cn/hdl/235041/17763]
专题	集美大学
推荐引用方式 GB/T 7714	郑青榕,顾安忠,蔡振雄,等. 氢在多壁碳纳米管上的等量吸附热[J]. http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=imiy200704010&dbcode=CJFQ&dbname=CJFQ2007,2012, 2012.
APA	郑青榕,顾安忠,蔡振雄,廖海峰,&郑超瑜.(2012).氢在多壁碳纳米管上的等量吸附热.http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=imiy200704010&dbcode=CJFQ&dbname=CJFQ2007.
MLA	郑青榕,et al."氢在多壁碳纳米管上的等量吸附热".http://epub.edu.cnki.net/grid2008/brief/detailj.aspx?filename=imiy200704010&dbcode=CJFQ&dbname=CJFQ2007 (2012).