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a) One of the dual pathways (pathway I) occurring on the Ti row. b) The other pathway (pathway II) involving bridge oxygen. c) Influence of different kinetic barriers (water dissociation, O–O coupling and hole diffusion) and Ch+ on the total turnover frequency (TOF). d) The contribution ratio between pathways I and II to the total TOF. Reproduced with permission.108 Copyright 2018, Springer Nature.
