Comment on 'Platinized WO_3 as an Environmental Photocatalyst that Generates OH Radicals under Visible Light'

摘要

Choi et al. claimed in a recent issue (August, 2010) of this journal that for the Pt/WO_3 photocatalysis system the generation of OH radicals mainly came from the reductive decomposition of H2O_2 that was produced in situ from the successive reduction of O_2 on the catalyst.1 Much thought and efforts have been made in the commented paper. However, unfortunately, the authors neglected important affecting factors of «OH generation in the system. As an interested yet very critical reader, I must raise serious doubts on the appropriateness and validity of the interpretations of the experimental data.