Promoting hydrogen absorption of liquid organic hydrogen carriers by solid metal hydrides

Reversible hydrogen absorption/desorption, the very fundamental property of metal hydrides (MHs), can be utilized to promote the hydrogen absorption of liquid organic hydrogen carriers (LOHCs). The hydrogen absorption of N -ethylcarbazole (NEC) catalyzed by a Ni/Al 2 O 3 catalyst was extremely slow,...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2019, Vol.7 (28), p.16677-16684
Main Authors: Wu, Yong, Yu, Hongen, Guo, Yanru, Zhang, Yuxuan, Jiang, Xiaojing, Sun, Bingxue, Fu, Kai, Chen, Jun, Qi, Yue, Zheng, Jie, Li, Xingguo
Format: Article
Language:English
Subjects:
Absorption
Aluminum oxide
Catalysis
Catalysts
Desorption
Heat treating
Hydrogen
Hydrogen storage materials
Labeling
Metal hydrides
Metals
N-ethylcarbazole
Nickel
Noble metals
Transition metals
Yttrium
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Reversible hydrogen absorption/desorption, the very fundamental property of metal hydrides (MHs), can be utilized to promote the hydrogen absorption of liquid organic hydrogen carriers (LOHCs). The hydrogen absorption of N -ethylcarbazole (NEC) catalyzed by a Ni/Al 2 O 3 catalyst was extremely slow, while the process could be significantly enhanced by simply mixing yttrium trihydride (YH 3 ). The hydrogen absorption performance was similar to that on the noble metal catalyst Ru/Al 2 O 3 . Using isotope labelling, we demonstrated that the enhanced hydrogen absorption originated from the reversible hydrogen absorption and desorption property of YH 3 : the atomic hydrogen in YH 3 can be transferred to the activated NEC molecules on Ni/Al 2 O 3 ; subsequently, the hydrogen vacancy left in YH 3 is replenished by H 2 . Inspired by this mechanism, we observed more general MH-promoted hydrogen absorption of LOHCs on transition metal catalysts. The combination of solid MHs and LOHCs with highly complementary merits provides a new strategy to develop high-performance hydrogen storage materials. The reversible hydrogen absorption/desorption property of REH 3 can be utilized to promote the hydrogen absorption of N -ethylcarbazole on Ni/Al 2 O 3 .
ISSN:2050-7488
2050-7496
DOI:10.1039/c9ta05966k