Water Adsorption Properties of Fe(pz)[Pt(CN)(4)] and the Capture of CO2 and CO
Por:
Alvarado-Alvarado, Daniel, Gonzalez-Estefan, Juan H., Gabriel Flores, J., Raziel Alvarez, J., Aguilar-Pliego, Julia, Islas-Jacome, Alejandro, Chastanet, Guillaume, Gonzalez-Zamora, Eduardo, Lara-Garcia, Hugo A., Alcantar-Vazquez, Brenda, Gonidec, Mathieu, Ibarra, Ilich A.
Publicada:
13 abr 2020
Resumen:
H2O and cyclohexane adsorption properties and the CO2 and CO capture
capability of the microporous material Fe(pz)[Pt(CN)(4)] were
examined. This 3D coordination polymer retained its crystallinity and
structural stability after all adsorption-desorption experiments
(demonstrated by PXRD and BET surface area). Thus, the total water
uptake was equal to 14.6 wt % (8.12 mmol g(-1)) at 90% P/P-0, and in
comparison to the adsorption of cyclohexane, Fe(pz) [Pt(CN)(4)]
demonstrated a relatively high degree of hydrophilicity. The total
cyclohexane uptake of 0.28 mmol g(-1), which in comparison to the total
water uptake value of 8.12 mmol g(-1), corroborated such hydrophilic
behavior. Additionally, the CO2 capture was equal to 9.3 wt % for
activated Fe(pz)[Pt(CN)(4)], a higher value in comparison to other
lead MOFs such as NOTT-400 (4.4 wt %), despite the fact that the latter
exhibits a larger BET surface area (1356 m(2)Cl) than
Fe(pz)[Pt(CN)(4)] (BET = 431 m(2) g(-1)). When the CO2 capture
capability was measured on a partially water saturated Fe(pz)
[Pt(CN)(4)] sample, we observed a weight gain from 11.7 wt % (only
water uptake) to 14.1 wt % (water + CO2). This weight increment (2.4 wt
%) was attributed to the oversolubility of CO2. The CO capture on
Fe(pz)[Pt(CN)(4)] showed a total uptake of 4.7 mmol/g after only 20
min, a result comparable to those for MOFs with much higher BET surface
areas, such as MOF-74(Mg) (BET = 1957 m(2) g(-1); 4.4 mmol g(-1)).
Finally, in situ DRIFT experiments exhibited the coordination of CO with
open Pt(II) metal sites.
Filiaciones:
Univ Nacl Autonoma Mexico, Lab Fisicoquim & Reactividad Superficies, Inst Invest Mat, Circuito Exterior S-N,Ciudad Univ, Ciudad De Mexico 04510, Mexico
CNRS, ICMCB, UMR 5026, F-33600 Pessac, France
Univ Bordeaux, ICMCB, UMR 5026, F-33600 Pessac, France
Univ Autonoma Metropolitana Azcapotzalco, Dept Quim Aplicada, Ciudad De Mexico 02200, Mexico
Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Ciudad De Mexico 09340, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Ciudad De Mexico 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Ingn Coordinac Ingn Ambiental, Ciudad De Mexico 04510, Mexico
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