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ChemSusChem. 2018 Feb 22;11(4):661-665. doi: 10.1002/cssc.201702256. Epub 2018 Jan 18.

2-(N-Methylbenzyl)pyridine: A Potential Liquid Organic Hydrogen Carrier with Fast H2 Release and Stable Activity in Consecutive Cycles.

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Department of Chemical Engineering, Hanyang University, Wangsimni-ro 222, 04763, Seoul, Republic of Korea.
Carbon Resources Institute, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Yuseong-gu, 34114, Daejeon, Republic of Korea.
Department of Chemical Engineering, University of Seoul, Seoulsiripdae-ro 163, Dongdaemun-gu, 02504, Seoul, Republic of Korea.
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Cheongam-Ro 77, Nam-Gu, 37673, Pohang, Republic of Korea.
Research Institute of Industrial Science, Hanyang University, Wangsimni-ro 222, 04763, Seoul, Republic of Korea.


The liquid organic hydrogen carrier (LOHC) 2-(N-methylbenzyl)pyridine (MBP) shows good potential for H2 storage based on reversible hydrogenation and dehydrogenation, with an H2 storage density of 6.15 wt %. This material and the corresponding perhydro product (H12 -MBP) are liquids at room temperature. Remarkably, H2 release is much faster from H12 -MBP over Pd/C than from the benchmark perhydro benzyltoluene over Pt/C at lower temperatures than 270 °C, owing to the addition of N atom into the benzene ring. Since this positive effect is unfavorable to the hydrogenation reaction, more Ru/Al2 O3 catalyst or prolonged reaction time must be applied for complete H2 storage. Experiments with repeated hydrogenation-dehydrogenation cycles reveal that reversible H2 storage and release are possible without degradation of the MBP/H12 -MBP pair. The prepared MBP satisfies the requirements for chemical stability, handling properties, and cytotoxicity testing.


dehydrogenation; heterocycles; hydrogen storage; sustainable chemistry

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