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Nanosizing ammonia borane with nickel – An all-solid and all-in-one approach for H2 generation by hydrolysis

Abstract : Ammonia borane NH3BH3 (AB) and nickel (Ni) have been considered together as an all-solid and all-in-one material for H-2 generation by hydrolysis at 20-50 degrees C. Our novel approach, denoted Ni/AB, consists of AB nanoparticles within a Ni matrix. Upon contact with water, Ni/AB readily hydrolyzes and liberates H-2 with a turnover frequency of 13.8 mol(H-2) mol(Ni)(-1) min(-1) at 43.3 degrees C. The apparent activation energy, determined over the temperature range 23.5-50.4 degrees C, is low, with 19.5 +/- 4.1 kJ mol(-1). These results imply that such a Ni matrix embedding AB acts as an effective catalyst. Beyond the catalytic performance, this is the first report of the successful utilization of an all-solid and all-in-one approach for the hydrolysis of AB, and the work brings unique perspectives for one-shot catalytic systems. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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https://hal.umontpellier.fr/hal-01871929
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Soumis le : mardi 11 septembre 2018 - 14:17:40
Dernière modification le : vendredi 5 août 2022 - 11:00:52

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Qiwen Lai, Kondo-Francois Aguey-Zinsou, Umit Demirci. Nanosizing ammonia borane with nickel – An all-solid and all-in-one approach for H2 generation by hydrolysis. International Journal of Hydrogen Energy, Elsevier, 2018, 43 (31), pp.14498 - 14506. ⟨10.1016/j.ijhydene.2018.05.124⟩. ⟨hal-01871929⟩

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