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Lithium‐Catalyzed Dehydrogenation of Ammonia Borane within Mesoporous Carbon Framework for Chemical Hydrogen Storage
Author(s) -
Li Li,
Yao Xiangdong,
Sun Chenghua,
Du Aijun,
Cheng Lina,
Zhu Zhonghua,
Yu Chengzhong,
Zou Jin,
Smith Sean C.,
Wang Ping,
Cheng HuiMing,
Frost Ray L.,
Max Lu Gao Qing
Publication year - 2009
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200801111
Subject(s) - ammonia borane , hydrogen storage , dehydrogenation , borazine , materials science , catalysis , lithium (medication) , hydrogen , mesoporous material , inorganic chemistry , gravimetric analysis , thermal decomposition , cryo adsorption , ammonia , chemical engineering , carbon fibers , nanotechnology , chemistry , organic chemistry , composite number , composite material , endocrinology , boron nitride , engineering , medicine
Ammonia borane (AB) has attracted tremendous interest for on‐board hydrogen storage due to its low molecular weight and high gravimetric hydrogen capacity below a moderate temperature. However, the slow kinetics, irreversibility, and formation of volatile materials (trace borazine and ammonia) limit its practical application. In this paper, a new catalytic strategy involved lithium (Li) catalysis and nanostructure confinement in mesoporous carbon (CMK‐3) for the thermal decomposition of AB is developed. AB loaded on the 5% Li/CMK‐3 framework releases ∼7 wt % of hydrogen at a very low temperature (around 60 °C) and entirely suppresses borazine and ammonia emissions that are harmful for proton exchange membrane fuel cells. The possible mechanism for enhanced hydrogen release via catalyzed thermal decomposition of AB is discussed.