Magnesium–carbon hydrogen storage hybrid materials produced by reactive ball milling in hydrogen

By M. Lototskyy, J. Sibanyoni, R. Denys, M. Williams, Bruno G. Pollet, V. Yartys. 2013

153 citations recorded by the source corpus.

Abstract Time-resolved studies uncovered kinetics and mechanism of Mg–hydrogen interactions during High energy reactive ball milling in hydrogen (HRBM) in presence of various types of carbon, including graphite (G), activated carbon (AC), multi-wall carbon nanotubes (MWCNT), expandable (EG) and thermally-expanded (TEG) graphite. Introduction of carbon significantly changes the hydrogenation behaviour, which becomes strongly dependent on the nature and amount of carbon additive. For the materials containing 1 wt.% AC or TEG, and 5 wt.% MWCNT, the hydrogenation becomes superior to that for the individual magnesium and finishes within 1 h. Analysis of the data indicates that carbon acts as a carrier of the “activated” hydrogen by a mechanism of spill-over. For Mg–G the hydrogenation starts from an incubation period and proceeds slower. An increase in the content of EG and TEG above 1 wt.% results in the deterioration of the hydrogenation kinetics. The effect of carbon additives has roots in their destruction during the HRBM to form graphene layers encapsulating the MgH 2 nanoparticles and preventing the grain growth. This results in an increase of absorption–desorption cycle stability and a decrease of the MgH 2 crystallite size in the re-hydrogenated Mg–C hybrid materials (40–125 nm) as compared to Mg alone (180 nm).

Subfields: Catalysis, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/de0586d7987a9e84c2f4f389d3429c5429b8d660

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Catalysis

1. M. Lototskyy
2. V. Yartys
3. Ping Chen
4. T. Jensen
5. M. Hirscher
6. Dorthe B. Ravnsbæk
7. M. Latroche
8. Y. Kojima

In Materials Chemistry

1. T. Jensen
2. Ping Chen
3. M. Lototskyy
4. V. Yartys
5. Y. Kojima
6. M. Hirscher
7. Dorthe B. Ravnsbæk
8. M. Latroche

Citations in the corpus

• Materials for hydrogen-based energy storage – past, recent progress and future outlook (2019, background): “ogen for 23.5 h. They reported full absorption at room temperature, but subsequent studies found the need for additives or catalysts such as transition metals, including Ni [79], V, Zr [45] or carbon [66], or allyl-iodide or multi-ring aromatic compounds of transition metals [44,73,80] to significan”