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(A) Scheme of the optical‐electrochemical system with ion‐selective membrane. Reproduced with permission from Ref. [25b]. Copyright 2018, Elsevier; (B) Schematic illustration on the self‐powered BPE strategy for the displaying analysis of catalytic redox reaction and photos of time‐dependent self‐powered‐BPE‐electrode for the ethanol electro‐oxidation. Reproduced with permission from Ref. [25a]. Copyright 2016, American Chemical Society.
