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The Capacity Enhancement of Room Temperature Hydrogen Storage in HiPco SWNT by Electrochemical deposition of Palladium Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Yong-Won Lee ,
Ranadeep Bhowmick  and
Bruce M. Clemens
Yong-Won Lee
Affiliation:
[email protected], Stanford University, Materials Science and Engineering, Room 210, 476 Lomita Mall, Stanford, CA, 94305, United States
Ranadeep Bhowmick
Affiliation:
[email protected], Stanford University, Stanford, 94305, United States
Bruce M. Clemens
Affiliation:
[email protected], Stanford University, Stanford, 94305, United States
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Abstract

A Sieverts apparatus for small quantity samples has been implemented by employing a very small volume pressure reservoir and a sample chamber of less than 1 ml. The hydrogen storage capacity of a commercially available, HiPco (high pressure CO conversion) single-wall carbon nanotube (SWNT) was measured over a hydrogen pressure range of 0-35 Bar at room temperature. The sample contained approximately 5 wt% of residual Fe catalyst, and showed 0.17 wt% of hydrogen uptake capacity at 30 Bar of hydrogen pressure. Palladium nanoparticles were deposited on the SWNT via electrochemical method (EC) from H2PdCl4 solution. The storage capacity of the SWNT with EC-doped Pd was increased to 0.52 wt% at 30 Bar, which corresponds to the capacity enhancement by a factor between 2.8 and 3.1.

Keywords

hydrogenationnanostructurecatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 927: Symposium EE – Hydrogen Storage Materials , 2006 , 0927-EE03-29
Copyright
Copyright © Materials Research Society 2006

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