Enhancement of hydrogen storage capacity of carbon nanotubes via spill-over from vanadium and palladium nanoparticles

被引：205

作者：

Zacharia, R

Kim, KY

Kibria, AKMF

Nahm, KS ^{[1
]}

机构：

[1] Chonbuk Natl Univ, Nanomat Res Ctr, Chonju 561756, South Korea

[2] Chonbuk Natl Univ, Sch Chem Engn & Technol, Chonju 561756, South Korea

[3] Atom Energy Ctr, Div Chem, Dhaka 1000, Bangladesh

来源：

CHEMICAL PHYSICS LETTERS | 2005年 / 412卷 / 4-6期

关键词：

D O I：

10.1016/j.cplett.2005.07.020

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The hydrogen storage capacities of palladium- and vanadium-doped carbon nanotubes (CNTs) at room temperature were investigated using the Sieverts apparatus. The storage capacity of Pd- and V-doped CNTs at 2 MPa were found to be 0.66 and 0.69 wt%, which are nearly 30% more than that of the pristine-CNTs. Also, the doped-CNTs exhibited faster initial hydrogen adsorption kinetics when compared with the pristine samples. The compensation of hydrogen storage by the metal particles in the doped-CNTs reveals that metal particles enhance the storage capacity via the spill-over mechanism. The re-adsorption studies of previously adsorbed samples suggested that nearly 70-85% of the spilled hydrogen occupies the physisorption binding sites, such as external-walls or groove-sites of CNTs. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：369 / 375

页数：7

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