Hydrogen absorption in carbon allotropes and talc

0490057 - ÚFM 2019 RIV SK eng J - Journal Article
Čermák, Jiří - Král, Lubomír
Hydrogen absorption in carbon allotropes and talc.
Kovové materiály. Roč. 56, č. 2 (2018), s. 75-80. ISSN 0023-432X. E-ISSN 1338-4252
R&D Projects: GA ČR(CZ) GA17-21683S
Institutional support: RVO:68081723
Keywords : hydrogen absorption * hydrogen storage * ball milling * carbon
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 0.593, year: 2018

Carbon is frequently used as an additive that facilitates fine ball-milling of hydrogen storage (HS) alloys. It is commonly supposed that the carbon does not take part significantly in HS above the room temperature. In the present paper, hydrogen sorption in three carbon allotropes (carbon black, graphite and modified carbon nano-plates) and in magnesium silicate mohohydrate (talc) was studied in temperature interval from 423 to 623 K. HS capacity from about 0.4% wt.% H2 (talc) to about 1.1% wt.% H2 (carbon black) was observed at a hydrogen pressure of 25 bar. The HS in all the studied materials was very weakly temperature activated.
Permanent Link: http://hdl.handle.net/11104/0286675