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Title: Toward New Candidates for Hydrogen Storage: High Surface Area Carbon Aerogels

Abstract

We report the hydrogen surface excess sorption saturation value of 5.3 wt% at 30 bar pressure at 77 K, from an activated carbon aerogel with a surface area of 3200 m{sup 2}/g as measured by Brunauer-Emmett-Teller (BET) analysis. This sorption value is one of the highest we have measured in a material of this type, comparable to values obtained in high surface area activated carbons. We also report, for the first time, the surface area dependence of hydrogen surface excess sorption isotherms of carbon aerogels at 77 K. Activated carbon aerogels with surface areas ranging from 1460 to 3200 m{sup 2}/g are evaluated and we find a linear dependence of the saturation of the gravimetric density with BET surface area for carbon aerogels up to 2550 m{sup 2}/g, in agreement with data from other types of carbons reported in the literature. Our measurements show these materials to have a differential enthalpy of adsorption at zero coverage of {approx}5 to 7 kJ/mole. We also show that the introduction of metal nanoparticles of nickel improves the sorption capacity while cobalt additions have no effect.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
964101
Report Number(s):
UCRL-JRNL-227848
Journal ID: ISSN 0897-4756; CMATEX; TRN: US200922%%96
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials, vol. 18, no. 26, December 26, 2006, pp. 6085-6087; Journal Volume: 18; Journal Issue: 26
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 25 ENERGY STORAGE; 08 HYDROGEN; ACTIVATED CARBON; ADSORPTION; CAPACITY; CARBON; COBALT ADDITIONS; ENTHALPY; HYDROGEN; HYDROGEN STORAGE; ISOTHERMS; NICKEL; SATURATION; SORPTION; SURFACE AREA

Citation Formats

Kabbour, H, Baumann, T F, Satcher, J H, Saulnier, A, and Ahn, C C. Toward New Candidates for Hydrogen Storage: High Surface Area Carbon Aerogels. United States: N. p., 2007. Web.
Kabbour, H, Baumann, T F, Satcher, J H, Saulnier, A, & Ahn, C C. Toward New Candidates for Hydrogen Storage: High Surface Area Carbon Aerogels. United States.
Kabbour, H, Baumann, T F, Satcher, J H, Saulnier, A, and Ahn, C C. Mon . "Toward New Candidates for Hydrogen Storage: High Surface Area Carbon Aerogels". United States. doi:. https://www.osti.gov/servlets/purl/964101.
@article{osti_964101,
title = {Toward New Candidates for Hydrogen Storage: High Surface Area Carbon Aerogels},
author = {Kabbour, H and Baumann, T F and Satcher, J H and Saulnier, A and Ahn, C C},
abstractNote = {We report the hydrogen surface excess sorption saturation value of 5.3 wt% at 30 bar pressure at 77 K, from an activated carbon aerogel with a surface area of 3200 m{sup 2}/g as measured by Brunauer-Emmett-Teller (BET) analysis. This sorption value is one of the highest we have measured in a material of this type, comparable to values obtained in high surface area activated carbons. We also report, for the first time, the surface area dependence of hydrogen surface excess sorption isotherms of carbon aerogels at 77 K. Activated carbon aerogels with surface areas ranging from 1460 to 3200 m{sup 2}/g are evaluated and we find a linear dependence of the saturation of the gravimetric density with BET surface area for carbon aerogels up to 2550 m{sup 2}/g, in agreement with data from other types of carbons reported in the literature. Our measurements show these materials to have a differential enthalpy of adsorption at zero coverage of {approx}5 to 7 kJ/mole. We also show that the introduction of metal nanoparticles of nickel improves the sorption capacity while cobalt additions have no effect.},
doi = {},
journal = {Chemistry of Materials, vol. 18, no. 26, December 26, 2006, pp. 6085-6087},
number = 26,
volume = 18,
place = {United States},
year = {Mon Feb 05 00:00:00 EST 2007},
month = {Mon Feb 05 00:00:00 EST 2007}
}