Uncovering The Role of Oxygen in Ni-Fe(OxHy) Electrocatalysts using In situ Soft X-ray Absorption Spectroscopy during the Oxygen Evolution Reaction. - Drevon, Dorian; Görlin, Mikaela; Chernev, Petko; Xi, Lifei; Dau, Holger; Lange, Kathrin M. (Scientific Reports, 2019)