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The authors thank Dr. Philip N. Ross, Jr., for helpful discussions on elertocatalysis, Zhongwei Zhu for assistance in XPS spectra acquisition, and Yimin Li and Hailiang Wang for fruitful discussions. TiOx film deposition was carried out at the Marvell Nano Lab, University of California, Berkeley (UCB). SEM and XPS studies were carried out at the Molecular Foundry, Lawrence Berkeley National Laboratory. This research was supported by the UCB-KAUST Academic Excellence Alliance (AEA) Program.