Question

Why four electrons require less energy than two electron pathway in oxygen reduction reaction?

Answer 1

Answer:

This mechanism can be considered as the direct four-electron reduction reaction. In this mechanism, no H2O2 is involved as well. Because there is adsorbed O2 on the surface, O▬O may not be broken down in the following steps, resulting in the formation of H2O2, which can be reduced further to form water.

Answer 2

Answer:

 · This mechanism can be considered as the direct four-electron reduction reaction. In this mechanism, no H2O2 is involved as well. Because there is adsorbed O2 on the surface, O▬O may not be broken down in the following steps, resulting in the formation of H2O2, which can be reduced further to form water