Assessing surface chemistry and pore structure of active carbons by a combination of physisorption (H2O, Ar, N2, CO2), XPS and TPD-MS.

Thommes M, Morlay C, Ahmad R, Joly JP (2011)

Publication Type: Journal article, Original article

Subtype: other

Publication year: 2011

Journal

Adsorption-Journal of the International Adsorption Society Springer Verlag (Germany)

Publisher: Springer

Book Volume: 17

Pages Range: 653-661

Journal Issue: 3

DOI: 10.1007/s10450-011-9360-4

Abstract

To address open questions concerning the surface chem. and pore structure characterization of nanoporous carbons, we performed extensive expts. by combining various exptl. techniques on a series of com. available activated carbons which exhibit diverse surface chem. characteristics. Pore size anal. was performed on Ar (87 K), N2 (77 K), and CO2 (273 K) adsorption isotherms using state-of-the art methods based on d. functional theory, including the recently developed quenched solid d. functional theory (QSDFT). A detailed study of the surface chem. was obtained by applying temp. programmed desorption coupled with mass spectrometry (TPD-MS) as well as XPS (X-Ray-Photoelectron Scattering). This information together with the pore structure information leads to a reliable interpretation of systematic water adsorption measurements obtained on these materials. Water adsorption is indeed a sensitive tool for detecting differences in surface chem. between chem. and phys. activated active carbon materials with comparable ultramicropore structure. The occurrence of sorption hysteresis assocd. with the filling of micro- and narrow mesopores (in a range where N2 and Ar isotherms are reversible) provides addnl. structural information, complementary to the insights from Ar/N2/CO2 adsorption. [on SciFinder(R)]

Authors with CRIS profile

Matthias Thommes

Involved external institutions

Quantachrome Instruments US United States (USA) (US) Université Claude Bernard Lyon 1 (UCB) FR France (FR)

How to cite

APA:

Thommes, M., Morlay, C., Ahmad, R., & Joly, J.P. (2011). Assessing surface chemistry and pore structure of active carbons by a combination of physisorption (H2O, Ar, N2, CO2), XPS and TPD-MS. Adsorption-Journal of the International Adsorption Society, 17(3), 653-661. https://dx.doi.org/10.1007/s10450-011-9360-4

MLA:

Thommes, Matthias, et al. "Assessing surface chemistry and pore structure of active carbons by a combination of physisorption (H2O, Ar, N2, CO2), XPS and TPD-MS." Adsorption-Journal of the International Adsorption Society 17.3 (2011): 653-661.

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