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PDF] 2 Electrocatalytic Oxygen Reduction Reaction - Semantic Scholar

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PDF] 2 Electrocatalytic Oxygen Reduction Reaction - Semantic Scholar

Oxygen (O2) is the most abundant element in the Earth’s crust. The oxygen reduction reaction (ORR) is also the most important reaction in life processes such as biological respiration, and in energy converting systems such as fuel cells. ORR in aqueous solutions occurs mainly by two pathways: the direct 4-electron reduction pathway from O2 to H2O, and the 2-electron reduction pathway from O2 to hydrogen peroxide (H2O2). In non-aqueous aprotic ...

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