T. T. A. Lucas, M. A. Melo Jr, A. L. M. Freitas, F. L. Souza, R. V. Gonçalves. Enhancing the solar water splitting activity of TiO2 nanotube-array photoanode by surface coating with La-doped SrTiO3, Solar Energy Materials and Solar Cells 208, 110428 (2020).