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We report a renewable display platform based on bipolar electrochemistry that uses bipolar electrochromic electrode (BP‐EC‐E) arrays for high‐throughput screening applications. Prussian blue (or another electrochromic material) is electrodeposited on one end of the bipolar electrode (BPE) as the signal reporter, and the other end is for the loading of catalyst. Owing to the quantitative relation between the two reactions occurring at both ends of the BP‐EC‐E, the discoloration speeds (Prussian blue to Prussian white) are related to the amount or the catalytic activity of the catalysts. Interestingly, the established platform can be used repeatedly, owing to the reversibility of the electrochromic reactions. With this strategy, we have achieved the fast imaging analysis of several electrocatalysts for methanol and ethanol oxidation.
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Zhang et al. (2015) studied this question.
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