Journal article
Enhanced hydrogen and methane gas storage of silicon oxycarbide derived carbon
Microporous and mesoporous materials, v 144(1), pp 105-112
2011
Abstract
Hierarchically porous (micro/meso) carbide derived carbon (CDC) is produced by high temperature chlorination of polymer derived SiOC ceramics. The hydrogen storage capacity of the formed SiOC-CDC at cryogenic temperatures (5.5 wt.%) was higher than that of other carbonaceous materials making it one of the most promising candidates for hydrogen storage so far. The material has also shown 21.5 wt% methane uptake at 60 bar at room temperature.
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► Amorphous SiOC were produced from polysiloxane resins after pyrolysis at 1200
°C. ► Chlorine etching of SiOC materials resulted in a hierarchically porous carbon. ► The formed carbon had high SSA reaching ∼2700
m
2/g and a large pore volume 1.72
cc/g. ► Excess hydrogen uptake value was 5.5
wt.% at 60
bar and −196
°C. ► Excess methane uptake without saturation was found as 21.5
wt.% at 60
bar and 25
°C.
Two polysilsesquioxanes, with an empirical formula (RSiO
1.5)
n
R
=
CH
3 (PMS) and CH
3–C
6H
5 (PMPS) were pyrolyzed at 1200
°C for 2
h to form SiOC ceramics of variable composition. Etching of polymer-derived SiOC ceramics with chlorine gas at 1200
°C produced micro-/mesoporous carbon with a high specific surface area (SSA) reaching up to 2700
m
2/g, hierarchical pore structure and showing very large pore volumes (up to 1.72
cc/g) without activation. Both, the SiOC precursors and the porous silicon oxycarbide derived carbons (SiOC-CDCs) were characterized in detail. Dissimilarities in the chemical composition and free carbon content of the formed ceramics yielded different microstructures at the nanoscale. This feature affected the final SSA and pore size distribution of the SiOC-CDC materials. The hydrogen and methane storage capacity of the produced SiOC-CDC materials yielded maximum excess gravimetric uptake of 5.5
wt.% H
2 at −196
°C and 21.5
wt.% CH
4 at 25
°C and 60
bar. These values are higher than for other CDCs, nanotubes and activated carbons tested under the same conditions.
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Details
- Title
- Enhanced hydrogen and methane gas storage of silicon oxycarbide derived carbon
- Creators
- Cekdar Vakifahmetoglu - Dipartimento di Ingegneria Meccanica – Settore Materiali, University of Padova, 35131 Padova, ItalyVolker Presser - Department of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USASun-Hwa Yeon - Department of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USAPaolo Colombo - Dipartimento di Ingegneria Meccanica – Settore Materiali, University of Padova, 35131 Padova, ItalyYury Gogotsi - Department of Materials Science and Engineering, A.J. Drexel Nanotechnology Institute, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Microporous and mesoporous materials, v 144(1), pp 105-112
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000293435400014
- Scopus ID
- 2-s2.0-79960174608
- Other Identifier
- 991014969850804721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Applied
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology