Investigations of hydrogen storage in palladium decorated graphene nanoplatelets

被引：9

作者：

Vinayan, B. P. ^{[1
]}

Sethupathi, K. ^{[1
]}

Ramaprabhu, S. ^{[1
]}

机构：

[1] Indian Inst Technol, AENL, NFMTC, Low Temp Phys Lab,Dept Phys, Chennai 600036, Tamil Nadu, India

来源：

TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS | 2011年 / 64卷 / 1-2期

关键词：

hydrogen storage; graphene nanoplatelets; palladium nanoparticles; sieverts apparatus; high pressure isotherm; CARBON NANOTUBES; ACTIVATED CARBONS; GRAPHITE OXIDE; ADSORPTION; REDUCTION; CAPACITY; SPECTROSCOPY; SPILLOVER; CATALYSTS; SILICA;

D O I：

10.1007/s12666-011-0033-5

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Carbon based nanomaterials are ideal media for hydrogen storage due to their highly porous structure, low density, and large surface area. The hydrogen uptake capacity of different carbon nanomaterials can be enhanced by spill over mechanism from a supported transition metal catalyst. In the present work graphene nanoplatelets (GNP) were prepared by thermal exfoliation method and decorated with palladium nanoparticles (Pd/GNP) by ethylene glycol reduction method. The high pressure hydrogen adsorption/desorption measurements were carried out for GNP and Pd/GNP using Sieverts apparatus in the temperature and pressure ranges of 25-100 degrees C and 0.1-4 MPa, respectively. The hydrogen storage capacity of GNP and Pd/GNP were found to be 0.28 wt% and 1.21 wt% respectively at 25 degrees C and 3.2 MPa pressure. Uniform dispersion of palladium nanoparticles over the surface of GNP enhances the hydrogen storage capacity of GNP by 70% due to spill over mechanism.

引用

页码：169 / 173

页数：5

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