Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 46, Issue 1, Pages 796-805Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.09.153
Keywords
Graphene quantum dots; Hydrogen evolution; Transition metal nanoparticles; Ammonia-borane; Sodium borohydride
Categories
Funding
- National Natural Science Foundation of China [21805166]
- 111 Project of China [D20015]
- Foundation of Science and Technology Bureau of Yichang City [A18-302-a07]
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University [KF2019-05]
- China Three Gorges University
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Recently, graphene quantum dots-transition metal nanoparticles (GQDs-TMNPs) have been successfully applied in the hydrolysis of NH3BH3 (AB) and NaBH4, showing high dispersibility and activity. GQDs-RhNPs, GQDs-RuNPs, and GQDs-PtNPs demonstrate high catalytic activity in the hydrolysis of AB, with turnover frequencies (TOFs) reaching up to 656, 384, and 281 mol(H2)center dot mol(cat)(-1) min(-1), respectively.
Recently, effective hydrogen (H-2) evolution upon hydrolysis of different hydrogen storage materials has received much attention. Herein, graphene quantum dots-transition metal nanoparticles (GQDs-TMNPs), with high dispersibility and activity, have been successfully applied in the hydrolysis of both NH3BH3 (AB) and NaBH4 for the first time. GQDs-RhNPs, GQDs-RuNPs, and GQDs-PtNPs are very effective in the hydrolysis of AB and the turnover frequencies (TOFs) can achieve to as high as 656, 384, and 281 mol(H2)center dot mol(cat)(-1) min(-1), respectively. Moreover, the synergistic effect between GQDs and TMNPs is explored, and the mechanisms of catalytic hydrolysis of AB and NaBH4 by GQDs-TMNPs are proposed. This work not only paves the way for the development of GQDs-TMNPs nanocatalysts for the different hydrogen storage materials, but also further advances the understanding of the synergistic effects between GQDs and TMNPs. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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