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Hydrogen storage in hierarchical nanoporous silicon–carbon nanotube architectures
Author(s) -
He Zhong,
Wang Shiunchin,
Wang Xianqin,
Iqbal Zafar
Publication year - 2012
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.2979
Subject(s) - carbon nanotube , hydrogen storage , nanoporous , materials science , hydrogen , adsorption , wafer , cryo adsorption , chemical engineering , silicon , nanotechnology , etching (microfabrication) , desorption , carbon fibers , chemistry , layer (electronics) , organic chemistry , composite material , optoelectronics , composite number , engineering
SUMMARY A porous silicon (pSi) wafer with a hierarchical, nanoporous architecture and pure single wall carbon nanotubes (SWNTs) have been combined by electrophoretic infiltration to form a unique hybrid pSi‐SWNT hydrogen storage system. The pSi architecture was fabricated by anodic etching of silicon wafers in alcoholic solutions of hydrogen fluoride. Direct hydrogen dosing to adsorb hydrogen on the pSi‐SWNT hybrid, pure pSi, electrochemically charged pSi and SWNTs, and pure SWNTs, followed by temperature programmed desorption measurements, were used to quantify the hydrogen adsorption process. The results indicate an increased hydrogen storage capacity at a lower temperature in the pSi‐SWNT system relative to that from pure pSi, and pure and charged SWNTs. In addition, hydrogen adsorption in pSi‐SWNT is about a factor of 2 to 6 higher than that in pure and charged pSi, and pure and charged SWNTs. Copyright © 2012 John Wiley & Sons, Ltd.