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. 2022 Feb 16;12:2604. doi: 10.1038/s41598-022-06608-7

Figure 3.

Figure 3

Comparative free energy diagram for Au–Ag/TiO2 (Au and Ag placed in bridging vacant oxygen site) slab structure. Blue, red, and green profiles represent Ti, Au, and Ag as active sites. Overpotential for all energy profiles are shown in the upper left corner. The rate-determining step for Au and Au as active sites is O* while OOH* for Ti atom as an active site. R.D.S is rate-determining step.