Title | Gas uptake in solvents confined in mesopores: adsorption versus enhanced solubility |
Publication Type | Journal Article |
Year of Publication | 2013 |
Authors | Ho LNgoc, Clauzier S, Schuurman Y, Farrusseng D, Coasne BA |
Journal | The Journal of Physical Chemistry Letters |
Volume | 4 |
Issue | 14 |
Pagination | 2274–2278 |
Date Published | Jun-25-2013 |
Abstract |
Three molecular mechanisms for gas uptake in a solvent confined in mesopores are identified. On the one hand, CO2 uptake is an adsorption-driven phenomenon that arises from the strong interaction between the gas molecules and the pore surface. On the other hand, H2 uptake is a confinement-induced enhanced solubility in which solubility is favored in the regions of low solvent density formed by the layering of the solvent. In partially filled pores, adsorption at the gas/liquid solvent interface is a third mechanism that leads to large gas uptakes. This study, which sheds light on previously reported yet unclear oversolubility in pores, provides a guide to design hybrid porous catalysts consisting of a solvent confined in a porous solid. |
DOI | 10.1021/jz401143x |