Comments on Kalamaras et al., Appl. Catal. B: Environ. 136-137 (2013) 225-238, discussing the difficulty in assessing reactant and product read-sorption effects in SSITKA-type work

摘要

A study of the water-gas shift (WGS) reaction (Eq. (1)) was recently published in this journal by Kalamaras et al. that reported steady-state isotopic transient kinetic analysis (SSITKA) and diffuse reflectance FT-IR spectroscopic (DRIFTS) data recorded over Pt-Ce-La-based catalysts [1]. CO + H2O -> CO2 + H2 (1) Such combination of advanced characterization techniques is rare and the authors should be acknowledged for carrying out such sets of time-consuming and difficult experiments. While I agree with most of the findings reported by the authors, there are yet a few points on the interpretation of the results that 1 would like to raise to the attention of the authors and, following preliminary constructive communications between Prof. Efstathiou and myself, I hope that my comments and the authors' reply will clarify further these concerns and/or misunderstandings for a larger audience.