Journal
JOURNAL OF CATALYSIS
Volume 378, Issue -, Pages 382-391Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2019.08.032
Keywords
Ru-Pd bifunctional catalyst; Catalytic hydrogenation; Catalytic dehydrogenation; Hydrogen storage; Liquid organic hydrogen carrier
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Funding
- National Natural Science Foundation of China [21603195, 21875225]
- Fundamental Research Funds for Central Universities [CUGL170405, CUG180604]
- major project of technical innovation of Hubei Province [2017AAA126]
- Open Foundation of Teaching Laboratory of China University of Geosciences [SKJ2018036]
- China University of Geosciences (Wuhan)
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Hydrogen storage and release by liquid organic hydrogen carriers (LOHCs) are achieved by a reversible catalytic hydrogenation and dehydrogenation process. Generally, catalytic hydrogenation and catalytic dehydrogenation require different noble metal catalysts. In this paper, we report a bifunctional Ru-Pd/Al2O3 catalyst with excellent catalytic activity for both hydrogenation and dehydrogenation of LOHCs. All catalysts were prepared by a facile impregnation-hydrogen reduction method, and the catalytic activities were compared by catalytic hydrogenation of N-propylcarbazole and dehydrogenation of perhydro-N-propylcarbazole. The as-prepared Ru-Pd/Al2O3 catalyst exhibits excellent catalytic hydrogenation and dehydrogenation activity, selectivity, and stability. Particularly, the dehydrogenation activity of the Ru-Pd/Al2O3 catalyst is superior to that of the commercial Pd/Al2O3 catalyst, which proves that the positive synergistic effect between palladium and ruthenium nanoparticles enhanced the activity of the Ru-Pd/Al2O3 catalyst. No significant activity decrease was observed for the as-prepared catalysts after three cycles of N-propylcarbazole hydrogenation and three cycles of dehydrogenation. The bifunctional Ru-Pd catalyst has potential commercial applications in large-scale application of LOHC technology. (C) 2019 Elsevier Inc. All rights reserved.
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