Please wait a minute...
物理化学学报  2002, Vol. 18 Issue (08): 692-698    DOI: 10.3866/PKU.WHXB20020805
研究论文     
氢气在碳纳米管基材料上的吸附-脱附特性
周振华;武小满;王毅;林国栋;张鸿斌
厦门大学化学化工学院,固体表面物理化学国家重点实验室,厦门 361005
Characteristics of Adsorption and Desorption of Hydrogen on Multi-walled Carbon Nanotubes
Zhou Zhen-Hua;Wu Xiao-Man;Wang Yi;Lin Guo-Dong;Zhang Hong-Bin
College of Chemistry and Chemical Engineering, State Key Laboratory of Physical Chemistry for the Solid Surfaces, Xiamen University, Xiamen 361005
 全文: PDF(2068 KB)   输出: BibTeX | EndNote (RIS) |
摘要: 利用高压容积法测定多壁碳纳米管(MWCNTs)及钾盐修饰的相应体系(K+-MWCNTs)的储氢容量,并用程序升温脱附(TPD)方法表征研究氢气在MWCNTs基材料上的吸附-脱附特性.结果表明,在经纯化MWCNTs上,室温、9.0 MPa实验条件下氢的储量可达1.51%(质量分数);K+盐对MWCNTs的修饰对增加其储氢容量并无促进效应,但相应化学吸附氢物种的脱附温度有所升高;K+的修饰也改变了MWCNTs表面原有的疏水性质.在低于723 K的温度下,H2/MWCNTs体系的脱附产物几乎全为氢气;773 K以上高温脱附产物不仅含H2,也含有CH4、C2H4、C2H2等C1/C2烃混合物;H2/K+-MWCNTs储氢试样的脱附产物除占主体量的H2及少量C1/C2烃混合物外,还含水汽,其量与吸附质H2源水汽含量密切相关.H2在碳纳米管基材料上吸附兼具非解离 (即分子态) 和解离(即原子态)两种形式.
关键词: 多壁碳纳米管碳纳米管基储氢材料氢吸附-脱附特性H2-TPD    
Abstract: Storage capacities of H2 in a kind of multi-walled carbon nanotubes (MWCNTs) and its corresponding system modified with K+ salt were measured using volumetric method, and characteristics of adsorption and desorption of hydrogen on MWCNTs were studied by means of temperature-programmed desorption (TPD) method. The results showed that the storage capacities of H2 in the purified MWCNTs could reach 1.51% (mass fraction) under condition of room temperature and 9.0 MPa, with adsorption of ~99% of the H2 being reversible. A comparative study indicated that the modification of the K+ salt to the MWCNTs did not improve its storage capacity of hydrogen, but led to elevating of desorption temperature of adsorbed hydrogen H2(a) to a certain extent; in addition, the K+ modification resulted also in changing of surface property of the MWCNTs from original hydrophobicity to hydrophilicity. The products desorbed on H2/MWCNTs involved exclusively H2 at T≤ 723 K, and main part of H2 and small amount of CH4,C2H4,and C2H2 at T ≥ 773 K; whereas on H2/K+-MWCNTs,H2O was also involved in the desorbed products, in addition to H2 and small amount of C1/C2-hydrocarbons.The adsorption of H2 on the MWCNTs-based materials is in the two models: associative (molecular state) and dissociative (atomic state).
Key words: Multi-walled carbon nanotubes    MWCNTs-based H2-storage material    Adsorption-desorption characteristics of H2    H2-TPD
收稿日期: 2001-12-19 出版日期: 2002-08-15
通讯作者: 张鸿斌     E-mail: hbzhang@xmu.edu.cn
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  
周振华
武小满
王毅
林国栋
张鸿斌

引用本文:

周振华;武小满;王毅;林国栋;张鸿斌. 氢气在碳纳米管基材料上的吸附-脱附特性[J]. 物理化学学报, 2002, 18(08): 692-698, 10.3866/PKU.WHXB20020805

Zhou Zhen-Hua;Wu Xiao-Man;Wang Yi;Lin Guo-Dong;Zhang Hong-Bin. Characteristics of Adsorption and Desorption of Hydrogen on Multi-walled Carbon Nanotubes. Acta Phys. -Chim. Sin., 2002, 18(08): 692-698, 10.3866/PKU.WHXB20020805.

链接本文:

http://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB20020805        http://www.whxb.pku.edu.cn/CN/Y2002/V18/I08/692

[1] 张杰,窦美玲,王峰,刘景军,李志林,吉静,宋夜. PDDA修饰的碳纳米管载铂电催化剂的合成及其在碱性条件下的氧气还原反应催化性能[J]. 物理化学学报, 2015, 31(9): 1727-1732.
[2] 杨超, 刘小青, 黄碧纯, 吴友明. Zr 改性MnOx/MWCNTs催化剂的结构特征与低温SCR活性[J]. 物理化学学报, 2014, 30(10): 1895-1902.
[3] 杨大威, 陈超, 谢青季, 姚守拙. 纳米材料修饰电极上吸附态葡萄糖氧化酶的酶活性和电活性的比较[J]. 物理化学学报, 2013, 29(08): 1727-1734.
[4] 罗红成, 黄碧纯, 付名利, 吴军良, 叶代启. MnOx/MWCNTs低温氨选择性催化还原NOx硫中毒机理[J]. 物理化学学报, 2012, 28(09): 2175-2182.
[5] 汤儆, 曾峤, 陈振东, 黄向前. 电化学间接测量法研究谷胱甘肽在多壁碳纳米管和活性炭上的吸附[J]. 物理化学学报, 2012, 28(05): 1269-1274.
[6] 聂素连, 赵彦春, 范杰文, 田建袅, 宁珍, 李笑笑. 高催化活性Pd-Co3O4/MWCNTs催化剂对甲醇氧化的电催化性能[J]. 物理化学学报, 2012, 28(04): 871-876.
[7] 尹诗斌, 罗林, 荆胜羽, 朱强强, 强颖怀. 交替微波加热法对制备氧还原催化剂性能的影响[J]. 物理化学学报, 2012, 28(01): 85-89.
[8] 薛荣, 阎景旺, 田颖, 衣宝廉. 镧掺杂的二氧化锰/碳纳米管电化学超级电容器复合电极[J]. 物理化学学报, 2011, 27(10): 2340-2346.
[9] 徐玲, 沈晓旭, 肖强, 钟依均, 叶素芳, 叶向荣, 朱伟东. Pd/Fe3O4-MCNT磁性催化剂的制备、表征及催化性能[J]. 物理化学学报, 2011, 27(08): 1956-1960.
[10] 周金梅, 李海燕, 林国栋, 张鸿斌. 多壁碳纳米管的纯化及其表面含氧基团的表征[J]. 物理化学学报, 2010, 26(11): 3080-3086.
[11] 熊振湖, 王璐, 周建国, 刘建明. 磁性多壁碳纳米管吸附水中双氯芬酸的热力学与动力学[J]. 物理化学学报, 2010, 26(11): 2890-2898.
[12] 赵彦春, 兰黄鲜, 邓彬彬, 田建袅, 杨秀林, 王凤阳. 聚乙酰苯胺修饰碳纳米管载铂催化剂对甲醇电催化氧化[J]. 物理化学学报, 2010, 26(08): 2255-2260.
[13] 伍英蕾, 杨军, 王久林, 尹利超, 努丽燕娜. 高性能锂-硫电池用复合正极的构造与粘结剂[J]. 物理化学学报, 2010, 26(02): 283-290.
[14] 郑伟玲, 肖潭, 朱朦琪, 吴萍. 聚苯乙炔包覆多壁碳纳米管的制备及其分散性[J]. 物理化学学报, 2009, 25(11): 2373-2379.
[15] 朱玉振;王胜;魏贤龙;丁力;张志勇;梁学磊;陈清;彭练矛. 多壁碳纳米管互连的单壁碳纳米管晶体管的频率特性[J]. 物理化学学报, 2008, 24(11): 2122-2127.