title: How water fosters a remarkable 5-fold increase in low-pressure CO2 uptake within mesoporous MIL-100(Fe).
abstract: The uptake and adsorption enthalpy of carbon dioxide at 0.2 bar have been studied in three different topical porous MOF samples, HKUST-1, UiO-66(Zr), and MIL-100(Fe), after having been pre-equilibrated under different relative humidities (3, 10, 20, 40%) of water vapor. If in the case of microporous UiO-66, CO(2) uptake remained similar whatever the relative humidity, and correlations were difficult for microporous HKUST-1 due to its relative instability toward water vapor. In the case of MIL-100(Fe), a remarkable 5-fold increase in CO(2) uptake was observed with increasing RH, up to 105 mg g(-1) CO(2) at 40% RH, in parallel with a large decrease in enthalpy measured. Cycling measurements show slight differences for the initial three cycles and complete reversibility with further cycles. These results suggest an enhanced solubility of CO(2) in the water-filled mesopores of MIL-100(Fe).
authors.affiliation: MADIREL (UMR CNRS 7246), Aix-Marseille University and CNRS, Centre de St Jerome, 13013 Marseille, France.
authors.forename: Estelle
authors.initials: E
authors.lastname: Soubeyrand-Lenoir
authors.forename: Christelle
authors.initials: C
authors.lastname: Vagner
authors.forename: Ji Woong
authors.initials: JW
authors.lastname: Yoon
authors.forename: Philippe
authors.initials: P
authors.lastname: Bazin
authors.forename: Florence
authors.initials: F
authors.lastname: Ragon
authors.forename: Young Kyu
authors.initials: YK
authors.lastname: Hwang
authors.forename: Christian
authors.initials: C
authors.lastname: Serre
authors.forename: Jong-San
authors.initials: JS
authors.lastname: Chang
authors.forename: Philip L
authors.initials: PL
authors.lastname: Llewellyn