How Reproducible are Surface Areas Calculated from the BET Equation?
Metadatos
Mostrar el registro completo del ítemEditorial
Wiley
Materia
Adsorption BET theory Porosimetry Porous materials Surface area
Fecha
2022-05-23Referencia bibliográfica
Osterrieth, J. W. M... [et al.]. How Reproducible are Surface Areas Calculated from the BET Equation?. Adv. Mater. 2022, 2201502. [https://doi.org/10.1002/adma.202201502]
Patrocinador
European Research Council (ERC) ERC-2016-COG 726380 ERC-2015-StG 677289 ERC-2017-StG 756489 639233; UK Research & Innovation (UKRI) Innovate UK 104384 UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC) IAA/RG85685; Cambridge International Scholarship TrinityHenry Barlow Scholarship; United States Department of Energy (DOE) DE-FG02-08ER15967; National Nuclear Security Administration DE-NA-0003525; United States Department of Energy (DOE); Alexander von Humboldt Foundation; Center for Information Services and High Performance Computing (ZIH) at TU Dresden; Department of Science & Technology (India); Science Engineering Research Board (SERB), India CRG/2019/000906; Active Co. Research Grant; European Commission through the H2020-MSCA-RISE-2019 program ZEOBIOCHEM -872102; Spanish MICINN and AEI/FEDER RTI2018-099504-B-C21; University of Alicante UATALENTO17-05; Spanish Government SEV-2017-0706 FWO 12T3519N 11D2220N; UK Research & Innovation (UKRI); Engineering & Physical Sciences Research Council (EPSRC) EP/L015978/1; National Research Foundation of Korea NRF-2017M3A7B4042140 NRF-2017M3A7B4042235; United States Department of Energy (DOE) DE-SC0010596; Indonesian Endowment Fund for Education-LPDP 202002220216006Resumen
Porosity and surface area analysis play a prominent role in modern materials
science. At the heart of this sits the Brunauer–Emmett–Teller (BET) theory,
which has been a remarkably successful contribution to the field of materials
science. The BET method was developed in the 1930s for open surfaces but is
now the most widely used metric for the estimation of surface areas of microand
mesoporous materials. Despite its widespread use, the calculation of
BET surface areas causes a spread in reported areas, resulting in reproducibility
problems in both academia and industry. To prove this, for this analysis,
18 already-measured raw adsorption isotherms were provided to sixty-one
labs, who were asked to calculate the corresponding BET areas. This roundrobin
exercise resulted in a wide range of values. Here, the reproducibility
of BET area determination from identical isotherms is demonstrated to be a
largely ignored issue, raising critical concerns over the reliability of reported
BET areas. To solve this major issue, a new computational approach to accurately
and systematically determine the BET area of nanoporous materials is
developed. The software, called “BET surface identification” (BETSI), expands
on the well-known Rouquerol criteria and makes an unambiguous BET area
assignment possible.