Atomically dispersed Cu O -Si bifunctional sites in ordered mesoporous silica for synergistic CO 2 -to C2+ electrosynthesis
Atomically dispersed Cu O -Si bifunctional sites in ordered mesoporous silica for synergistic CO 2 -to C2+ electrosynthesis
研究概述
在有序介孔二氧化硅中构建原子分散Cu–O–Si双功能位点，用于CO2电还原制多碳产物。载体促进*CO生成，Cu位点促进C–C偶联，介孔结构提高*CO覆盖度；400 mA/cm²下C2+法拉第效率73.9%。研究强调氧化物载体也参与反应。
谱图与表征信息
Figure 2. Structural characterizations of Cu1/OM-SiO2, Cu1/DM-SiO2 and Cu1/S-SiO2 catalysts. (a) FT-IR spectra highlighting the bond structures in the catalysts. (b) Cu 2p XPS spectra of the catalysts. (c) O 1s and (d) Si 2p XPS spectra of Cu1/OM-SiO2. (e) Normalized Cu K-edge XANES spectra, (f) first-order derivatives of the XANES spectra, and (g) Cu K-edge FT-EXAFS spectra of the catalysts. (h) R-space of Cu K-edge EXAFS fitting curves and (i) Morlet wavelet transform contour plots for the k3-weighted EXAFS spectra of Cu1/OM-SiO2.
Figure 4. Structural characterizations of Cu1/OM-SiO2, Cu1/DM-SiO2 and Cu1/S-SiO2 catalysts after CO2RR. (a) Cu 2p XPS spectra, (b) Cu LMM Auger XPS spectra, (c) Normalized Cu K-edge XANES spectra and (d) Cu K-edge FT-EXAFS spectra of the catalysts after CO2RR. (e) Quasi in-situ Normalized Cu K-edge XANES spectra and (f) quasi in-situ Cu K-edge FT-EXAFS spectra of Cu1/OM-SiO2 catalyst under CO2RR condition.
Figure S11. R-space of Cu K-edge EXAFS fitting curves of Cu1/DM-SiO2 (a) and
Figure S12. Morlet wavelet transform contour plots for the k3-weighted EXAFS of