1. How Reproducible are Surface Areas Calculated from the BET Equation?
- Author
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Osterrieth JWM, Rampersad J, Madden D, Rampal N, Skoric L, Connolly B, Allendorf MD, Stavila V, Snider JL, Ameloot R, Marreiros J, Ania C, Azevedo D, Vilarrasa-Garcia E, Santos BF, Bu XH, Chang Z, Bunzen H, Champness NR, Griffin SL, Chen B, Lin RB, Coasne B, Cohen S, Moreton JC, Colón YJ, Chen L, Clowes R, Coudert FX, Cui Y, Hou B, D'Alessandro DM, Doheny PW, Dincă M, Sun C, Doonan C, Huxley MT, Evans JD, Falcaro P, Ricco R, Farha O, Idrees KB, Islamoglu T, Feng P, Yang H, Forgan RS, Bara D, Furukawa S, Sanchez E, Gascon J, Telalović S, Ghosh SK, Mukherjee S, Hill MR, Sadiq MM, Horcajada P, Salcedo-Abraira P, Kaneko K, Kukobat R, Kenvin J, Keskin S, Kitagawa S, Otake KI, Lively RP, DeWitt SJA, Llewellyn P, Lotsch BV, Emmerling ST, Pütz AM, Martí-Gastaldo C, Padial NM, García-Martínez J, Linares N, Maspoch D, Suárez Del Pino JA, Moghadam P, Oktavian R, Morris RE, Wheatley PS, Navarro J, Petit C, Danaci D, Rosseinsky MJ, Katsoulidis AP, Schröder M, Han X, Yang S, Serre C, Mouchaham G, Sholl DS, Thyagarajan R, Siderius D, Snurr RQ, Goncalves RB, Telfer S, Lee SJ, Ting VP, Rowlandson JL, Uemura T, Iiyuka T, van der Veen MA, Rega D, Van Speybroeck V, Rogge SMJ, Lamaire A, Walton KS, Bingel LW, Wuttke S, Andreo J, Yaghi O, Zhang B, Yavuz CT, Nguyen TS, Zamora F, Montoro C, Zhou H, Kirchon A, and Fairen-Jimenez D
- Subjects
- Adsorption, Porosity, Reproducibility of Results
- Abstract
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 micro- and 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 round-robin 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., (© 2022 The Authors. Advanced Materials published by Wiley-VCH GmbH.)
- Published
- 2022
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