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[1]原建光,李莹,谈亚军,等.碳载钯的添加对镁基储氢合金吸放氢性能的影响[J].南京工业大学学报(自然科学版),2015,37(03):0.
 YUAN Jianguang,LI Ying,TAN Yajun,et al.Effects of multi-wall carbon nanotubes supported palladium addition on hydrogen storage properties of magnesium hydride[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2015,37(03):0.
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碳载钯的添加对镁基储氢合金吸放氢性能的影响()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
37
期数:
2015年03期
页码:
0
栏目:
出版日期:
2015-05-30

文章信息/Info

Title:
Effects of multi-wall carbon nanotubes supported palladium addition on hydrogen storage properties of magnesium hydride
作者:
原建光李莹谈亚军毛奇峰刘虎朱云峰李李泉
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
YUAN JianguangLI YingTAN YajunMAO QifengLIU HuZHU YunfengLI Liquan
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
镁基储氢材料 钯碳催化剂 机械球磨 氢化燃烧合成
Keywords:
Mg-based hydrogen storage materials Pd/MWCNTs catalyst mechanical milling hydriding combustion synthesis
文献标志码:
A
摘要:
采用溶液化学还原法制备钯载量分别为10%、20%、30%和40%(质量分数)的多壁碳纳米管载钯(Pd/MWCNTs)催化剂,然后与Mg粉混合成95Mg-mPd/(5-m)MWCNTs(m=0.5、1、1.5和2),采用氢化燃烧合成法(HCS)制备镁基氢化物,最后机械球磨(MM)10 h。采用X线衍射(XRD)、透射电子显微镜(TEM)、场发射扫描电子显微镜(FESEM)及气体反应控制器研究材料的相组成、微观形貌和吸放氢性能。结果表明:Pd/MWCNTs大幅提高HCS过程中Mg的氢化程度,在HCS过程中形成的MgPd合金明显提高复合材料的储氢性能。样品95Mg-2Pd/3MWCNTs在473 K下、100 s内,饱和吸氢量达到6.66%(质量分数); 在573 K下、1 800 s内,放氢量高达6.25%(质量分数); 其放氢的表观活化能与市售MgH2相比,从153 kJ/mol降低到80.8 kJ/mol。
Abstract:
Multi-wall carbon nanotubes(MWCNTs)with different amounts of Pd(10%,20%,30% and 40%)were synthesized by a solution reduction method.95Mg-mPd/(5-m)MWCNTs(m=0.5,1,1.5 and 2)were prepared by hydriding combustion synthesis(HCS)and mechanical milling(MM).The phase compositions,surface morphologies and hydriding/dehydriding properties of the samples were examined by X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),transmission electron microscope(TEM), and gas reaction controller.Results showed that Pd/MWCNTs could significantly increase the hydrogenation degree of magnesium during the HCS process.The MgPd alloy made the dehydrogenation process of MgH2 easier.The 95Mg-2Pd/3MWCNTs showed best hydriding/dehydriding properties,requiring only 100 s to reach its saturated hydrogen absorption capacity of 6.66% at 473 K,and desorbing 6.25% hydrogen within 1 800 s at 573 K.Additionally,the dehydrogenation activation energy of MgH2 in the system decreased from 153 kJ/mol to 80.8 kJ/mol.

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备注/Memo

备注/Memo:
收稿日期:2014-03-29
基金项目:国家自然科学基金(50871052); 江苏省青蓝工程; 江苏省高校自然科学研究重大项目(13KJA430003); 江苏省普通高校研究生科研创新计划(CXZZ12_0408)
作者简介:原建光(1983—),男,山东威海人,博士生,主要研究方向为新型能源材料; 李李泉(联系人),教授,E-mail: lilq@njtech.edu.cn.
引用本文:原建光,李莹,谈亚军,等.碳载钯的添加对镁基储氢合金吸放氢性能的影响[J].南京工业大学学报:自然科学版,2015,37(3):1-7..
更新日期/Last Update: 2015-05-20