Changes in electrode surface chemistry under electrochemical conditions critically influence electrocatalytic performance. In this Communication published in Angewandte Chemie, in-situ electrochemical X-ray photoelectron spectroscopy was employed to monitor the surface state of tungsten carbide (WC) powder electrodes during the hydrogen evolution reaction (HER) and at oxidative potentials. This study
was led by Julia Kunze-Liebhäuser (University of Innsbruck).