RESEARCH / A0374
Tailoring Single Co–N4 Sites Within the Second Coordination Shell for Enhanced Natural Light-Driven Photosynthetic H2O2 Production
Read the original paper · 10.1021/acsnano.5c02303 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Figure 2. Electronic state and atomic structure characterization of the resulting samples. (a) C K-edge soft XANES spectra of Co−N4−CN and Co−N4−ON. (b) N K-edge XANES spectra of Co−N4−CN and Co−N4−ON. (c) XANES spectra of the normalized Co K-edge of Co foil, CoO, Co2O3, Co−N4−CN, and Co−N4−ON. (d) The calculated Co oxidation states from the XANES spectra of Co−N4−ON along with those of Co foil, CoO, Co2O3, and Co−N4−CN as references. (e) The corresponding Fourier transform EXAFS spectra. (f) EXAFS fitting curves of the Co−N4−ON in R-space. (g) Wavelet transform (WT) plots of Co foil, CoO, Co2O3, Co−N4−CN, and Co−N4−ON.