Jump to main content
Jump to site search

Issue 12, 2016
Previous Article Next Article

LiAlH4 supported on TiO2/hierarchically porous carbon nanocomposites with enhanced hydrogen storage properties

Author affiliations

Abstract

We report the synthesis of LiAlH4 supported on TiO2/hierarchically porous carbon (LAH–TiO2/HPC) nanocomposites using a one-step solvent method and their enhanced catalytic dehydrogenation performance. The as-prepared TiO2/HPC nanocomposites show that TiO2 nanoparticles (∼10 nm) are homogeneously distributed on the surface of hierarchically porous carbon (HPC). The results show that TiO2/HPC nanocomposites exhibit better catalytic performance for the dehydrogenation of LiAlH4 and rehydrogenation of the dehydrided sample than that of TiO2 nanoparticles and HPC. The dehydrogenation temperature of 37LAH–25TiO2/38HPC with 37 wt% LiAlH4, 25 wt% TiO2 and 38 wt% HPC is the lowest. Hydrogen started to be released at 64 °C, which is about 100 °C lower than that of pure LiAlH4. In addition, 4.3 wt% of hydrogen could be released from 37LAH–25TiO2/38HPC within 40 min at 130 °C, indicating fast kinetics with an activation energy of 47.1 ± 3.5 kJ mol−1. Furthermore, it can re-adsorb H2 at 300 °C under a hydrogen pressure of 4 MPa. The nanoconfinement of LiAlH4 into hierarchically porous carbon with high surface areas and the high distribution of TiO2 nanoparticles with a Ti(4+)/Ti(3+)/Ti(2+) defect site play a synergistic role in improving the hydrogen storage properties of LiAlH4.

Graphical abstract: LiAlH4 supported on TiO2/hierarchically porous carbon nanocomposites with enhanced hydrogen storage properties

Back to tab navigation

Supplementary files

Publication details

The article was received on 23 Jun 2016, accepted on 29 Sep 2016 and first published on 30 Sep 2016


Article type: Research Article
DOI: 10.1039/C6QI00200E
Citation: Inorg. Chem. Front., 2016,3, 1536-1542
  •   Request permissions

    LiAlH4 supported on TiO2/hierarchically porous carbon nanocomposites with enhanced hydrogen storage properties

    Y. Zhao, M. Han, H. Wang, C. Chen and J. Chen, Inorg. Chem. Front., 2016, 3, 1536
    DOI: 10.1039/C6QI00200E

Search articles by author

Spotlight

Advertisements