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- W2894861463 abstract "New methods for interconversion of electrical and chemical energy are crucial to addressing emerging challenges in renewable energy storage and conversion. Dissolved redox mediators provide an effective means to transport electrons (and protons) between an electrode and catalysts that are not in direct physical contact with an electrode. Mediators are widely implemented in biofuel cells, but such devices typically exhibit low power densities. Here, we report the development of a tetrasubstituted quinone mediator that exhibits excellent stability under strongly acidic conditions and supports electrochemical reduction of O2 at an off-electrode heterogeneous cobalt catalyst contained within a packed-bed reactor. Efficient oxidation of the hydroquinone by O2 in the reactor provides the basis for mediator regeneration, and an integrated “flow-cathode” fuel cell system supports high power densities. These results establish the combination of organic mediators with off-electrode heterogeneous catalysts as a versatile platform for development of new electrode-driven chemical redox transformations." @default.
- W2894861463 created "2018-10-12" @default.
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- W2894861463 date "2018-12-01" @default.
- W2894861463 modified "2023-10-14" @default.
- W2894861463 title "Quinone-Mediated Electrochemical O2 Reduction Accessing High Power Density with an Off-Electrode Co-N/C Catalyst" @default.
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- W2894861463 doi "https://doi.org/10.1016/j.joule.2018.09.010" @default.
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