Comment on “Boosting the solar water oxidation performance of a BiVO4 photoanode by crystallographic orientation control” by H. S. Han, S. Shin, D. H. Kim, I. J. Park, J. S. Kim, P. Huang, J. Lee, I. S. Cho and X. Zheng, Energy Environ. Sci., 2018, 11, 1299

The presence of scarce (101)-oriented F:SnO 2 grains in the fluorine-doped SnO 2 layer with a slight (100) texture seems insufficient to drive predominantly (001)-oriented growth of a BiVO 4 photoanode through the alleged microscale epitaxy.