Which process limits maximum current density in solid-state catalyst electrodes under electrochemical oxidation?

💡 Explanation

When electrochemical oxidation proceeds, depletion of reactive surface intermediates occurs due to product formation and diffusion limitations, which decreases availability for subsequent reaction, limiting current density. Therefore surface intermediate depletion is the limit, rather than joule heating, electrolyte conductivity, or recombination which occur via different mechanisms with independent conditions.

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