Fig. 2: Electronic structure and environment of Bn-C.

a–c High-resolution C 1 s, B 1 s and O 1 s XPS spectra. d B K-edge XANES spectra for B_n-C, B₁-C, B powder. e C K-edge XANES spectra for B_n-C, B₁-C and Pure C. f EPR signals of B_n-C and control catalysts.