Effect of meso- and micropore structures on the hydrogen storage properties of nanoporous carbon materials

We report on the pore structure and hydrogen storage properties of nanoporous carbon (NPC) prepared by KOH activation of rice husk ash. The specific surface area of the NPC increased from 220 to 2770 m 2 /g with an increase in KOH/rice husk ash weight ratio from 1:1 to 7:1. In addition, the micropor...

Full description

Saved in:
Bibliographic Details
Published in:Journal of porous materials 2018-12, Vol.25 (6), p.1765-1770
Main Authors: Toda, Ikumi, Komatsu, Keiji, Watanabe, Takuhiro, Toda, Hiroe, Akasaka, Hiroki, Ohshio, Shigeo, Saitoh, Hidetoshi
Format: Article
Language:English
Subjects:
Ashes
Carbon
Catalysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Hydrogen
Hydrogen storage
Physical Chemistry
Pore size
Pore size distribution
Porosity
Weight
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:We report on the pore structure and hydrogen storage properties of nanoporous carbon (NPC) prepared by KOH activation of rice husk ash. The specific surface area of the NPC increased from 220 to 2770 m 2 /g with an increase in KOH/rice husk ash weight ratio from 1:1 to 7:1. In addition, the micropore volume of the NPC increased from 0.08 to 0.73 cm 3 /g with an increase in KOH quantity. Furthermore, the mesopore volume also increased from 0.08 to 2.17 cm 3 /g. Results of pore size distribution studies indicated NPC pore size widening from the micropore to the mesopore scale with the addition of further KOH. The stored hydrogen content of the NPC therefore increased with the development of the pore structure. From these results, we propose that this change in pore size is responsible for the increase in stored hydrogen content in NPCs.
ISSN:1380-2224
1573-4854
DOI:10.1007/s10934-018-0589-0