Peng, X.; Zhang, R.; Feng, R.; Liu, A.; Zhou, C.; Guo, Q.; Yang, X.; Jiang, Y.; Ren, Z. Active Species in Photocatalytic Reactions of Methanol on TiO2(110) Identified by Surface Sum Frequency Generation Vibrational Spectroscopy. J. Phys. Chem. C 2019, 123, 13789-13794.