RESEARCH / A0276
Accelerating Proton-supplying via Customizing Diatomic Sites for Boosted Electrochemical CO2 Reduction Activity
Read the original paper · 10.1016/j.nanoen.2025.111469 ↗
Source figures may contain other techniques and soft X-ray spectra. C, N and O measurements are outside our current hard-XAFS testing range.
Fig. 2. Electronic valence state and fine structures. Normalized XANES χ(E) spectra of Ni (a) and Mn (b) on NiMn-SNC. (c, d) Radial distance χ(R) space spectra of Ni (c) and Mn (d)on NiMn-SNC. (e) WT plots of NiMn-SNC, Mn foil and Ni foil. (f, g) EXAFS fitting of NiMn-SNC in R space at Ni K-edge (f) and Mn K-edge (g). (h) Structure model of the NiMn-SNC (Mn in green, Ni in blue, N in silvery, S in yellow, and C in gray).
Fig. 4. Protonation process investigations. (a-c) In-situ ATR-SEIRAS spectra of NiMn-SNC, Ni-SNC and Mn-SNC. (d, e) Plots of potential against wavenumbers in the water and CO adsorption in ATR-SEIRAS spectra for CO2RR over different samples. (f) Fitted average oxidation states of Ni from XANES spectra. (g) Ni R-space EXAFS spectra of NiMn-SNC recorded at different cathodic potentials during CO2RR. (h) Mechanism of Ni–Mn diatomic sites synergistically accelerating PCET process in CO2RR.