期刊
CHEMICAL ENGINEERING JOURNAL
卷 421, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127781
关键词
Liquid organic hydrogen carrier (LOHC); Bimetallic catalyst; Hydrogenation; Dehydrogenation; N-ethylcarbazole
资金
- National Natural Science Foundation of China [22078354, 21776295, 11227902, 11805255]
- Youth Innovation Promotion Association of CAS [2017355]
- Shanghai Functional Platform for Innovation Low Carbon Technology
Hydrogen, a promising candidate to replace fossil fuels, faces challenges in storage. A new reusable bimetallic Pd-Rh nanoparticles (NPs) catalyst shows potential for high-weight% hydrogen storage. The mechanism proposed for NEC hydrogenation over the Pd-Rh catalyst opens avenues for the development of LOHCs as energy vectors.
Hydrogen is a promising candidate to replace the exhausting fossil fuels. However, it is still a big challenge for hydrogen storage. Liquid organic hydrogen carrier (LOHC), which possesses high safety and purity, easy transport and reversibility, is highly attractive for hydrogen storage. Herein we report a new reusable bimetallic Pd-Rh nanoparticles (NPs) catalyst with synergy effect, boosting both the hydrogenation of N-ethylcarbazole (NEC) and dehydrogenation of dodecahydro-N-ethylcarbazole (12H-NEC), which allows multiple cycles of reversible high-weight% hydrogen storage and uptake in short reaction time. Various ex- and in-situ characterizations evidenced that the superior activity was attributed to the bimetallic Pd-Rh NPs cluster structure on the surface of gamma-Al2O3 support. The mechanism of NEC hydrogenation over the Pd-Rh catalyst was proposed and verified by density functional theory (DFT) calculations. Such a strategy can be extended to other LOHCs and sheds light onto the development of LOHCs as energy vectors.
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