Reprint of: Reply to the “Comment on the paper ‘The role of HBF4 in electro-catalysis: Arsenic contamination and anion adsorption’ by A.L. Santos, R. Nagao, C.P. Oliveira, R.B. de Lima, H. Varela [J. Electroanal. Chem. 660 (2011) 147–152]”