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

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Free energy diagrams for OER through peroxo species on TiO₂ rutile (110) under external potential U = 0.00 V. (Black profile = O₂ evolution pathways go via the peroxo O* intermediate. The rate-determining steps (R.D.S) are indicated with an arrow. The overpotential is displayed in the upper left corner. (recreated from³³).