Redox Flow Batteries Vanadium to Earth Quinones

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Redox Flow Batteries Vanadium to Earth Quinones ( redox-flow-batteries-vanadium-earth-quinones )

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Figure 6.36 – a) Mechanism interpretation, based on published results227, for the negative reaction of VRFBs using CF and CF@N900 electrodes. b) Mechanism interpretation, based on published results227, for the negative reaction of VRFBs using CF@TiO2, and nitrided CF@TiO2 as electrodes. Thirdly, after the TiO2 is deposited there are two conditions that favour the V3+ reduction: i) Increase of –OH groups and less importantly –O groups, as XPS data shows, due to the presence of titanium dioxide itself that promote the number of active sites per area for the reaction to happen, enhancing the electron charge transfer at the electrode/vanadium interface. ii) Highly stable proton absorption over the Ti-O bond inhibiting the HER side reaction. However, large electrode polarization is dominant at high rate capability 130

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