The percentage reduction in accessible surface area (ASA) was calculated from the differences between the theoretical ASA and experimental ASA estimated with the Brunauer-Emmett-Teller (BET) method. Usually experimental ASA characterizations are reported using both the BET and Langmuir method. However, in few cases the Langmuir ASA was only reported, and so the missing BET value has to be filled. For this case, the data that presented both BET and Langmuir ASA were firstly fitted to a linear equation (Figure ). Then the fitted equation was used to predict the missing BET ASA values.