Water splitting—breaking water molecules into hydrogen and oxygen—is a promising pathway to sustainable energy. However, this process has long been challenged by the slow chemical kinetics of the oxygen evolution reaction that make hydrogen production inefficient and costly. Water splitting—breaking water molecules into hydrogen and oxygen—is a promising pathway to sustainable energy. However, this process has long been challenged by the slow chemical kinetics of the oxygen evolution reaction that make hydrogen production inefficient and costly. Condensed Matter Quantum Physics Phys.org – latest science and technology news stories