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Oxygen Evolution Reaction

Keywords

Oxygen evolution, water oxidation, water splitting

Introduction

The oxygen evolution reaction (OER) is an enabler of several technological applications. In energy storage, these include regenerative fuel cells, electrolyzers, metal-air batteries, and solar-driven water-splitting devices. Traditional metal refinery techniques such as electro-deposition, electro-synthesis, and electro-refining also generally involve the OER on the anode. In addition, the OER is central to natural photosynthesis in plants, algae and cyanobacteria as well as artificial photosynthesis. Due to the ubiquitous nature of the OER, numerous efforts from chemists, physicists, biologists, and engineers have been made to understand the OER mechanism as mastery of it holds key to unlocking fundamental mechanism of oxygen chemistry and strategy to develop more cost-effective OER-based technology. However, to date, the exact mechanism of the OER is not known. Furthermore, the high