Fig. 2. Crystal structures, electronic structures, and local atomic arrangement of highly disordered RuO₂ nanosheets.

a Ru 3p XPS, b O 1s XPS, c O K-edge XANES, d schematic orbital diagram of RuO₂, e Ru K-edge FT-EXAFS data, f EXAFS fitting data (The radial distance was not phase-corrected.), and j micro-Raman data of aRu materials, layered RuO₂, and bulk RuO₂. WT-EXAFS data of g layered RuO₂, h aRu200, and i bulk RuO₂.