Verena Pfeifer

TL;DR: In this paper, the electronic structure of iridium oxide was investigated using synchrotron-based X-ray photoemission and absorption spectroscopies with theoretical calculations.

TL;DR: This investigation reveals a pre-edge feature in the O K-edge of highly catalytically active X-ray amorphous iridium oxides that is identified as O 2p hole states forming in conjunction with Ir(III) and these electronic defects in the near-surface region of the anionic and cationic framework are likely critical for the enhanced activity of amorphously irium oxides relative to their crystalline counterparts.

TL;DR: In situ XAS measurements reveal that electron-deficient oxygen species form during OER on IrOx and correlate with catalytic activity.

TL;DR: Exceptional reactivity of electrophilic oxygen species in highly OER-active IrIII/IV oxyhydroxides is evidenced by room temperature CO oxidation.

TL;DR: It is found that cobalt is anchored on graphene via carbonyl-like species, namely Co(CO)x , promoting the reduction of Co(3+) to Co(2+), which is believed to be the active site of the catalyst.