Lithium‐Catalyzed Dehydrogenation of Ammonia Borane within Mesoporous Carbon Framework for Chemical Hydrogen Storage |
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| Authors: | Li Li Xiangdong Yao Chenghua Sun Aijun Du Lina Cheng Zhonghua Zhu Chengzhong Yu Jin Zou Sean C. Smith Ping Wang Hui‐Ming Cheng Ray L. Frost Gao Qing Lu |
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| Affiliation: | 1. ARC Centre of Excellence for Functional Nanomaterials School of Engineering and Australian Institute of Bioengineering and Nanotechnology The University of Queensland QLD 4072 Brisbane (Australia);2. Centre for Computational Molecular Science The University of Queensland QLD 4072 Brisbane (Australia);3. Department of Chemistry, Fudan University Shanghai 200433 (P.R. China);4. Centre for Microscopy and Microanalysis and School of Engineering The University of Queensland QLD 4072 Brisbane (Australia);5. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 (P.R. China);6. School of Physical & Chemical Sciences Queensland University of Technology QLD 4001 Brisbane (Australia) |
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| Abstract: | 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. |
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| Keywords: | Ammonia borane Hydrogen storage Catalysis Fuel cells |
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