RESEARCH / A0566
Pulsed Electrolysis Promotes CO2 Reduction to Ethanol on Heterostructured Cu2O/Ag Catalysts
Read the original paper · 10.1002/smll.202307637 ↗
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 4. In situ XAS spectra and in situ Raman spectra of se-Cu2O/Ag. a,c) in situ XANES spectra of the Cu K-edge at −1.1 V versus RHE under a) potentiostatic electrolysis and c) pulsed electrolysis (Ea = +0.4 V vs RHE, ta = tc = 0.5 s), respectively, in CO2-saturated 0.5 m KHCO3. b,d) the corresponding 1st derivative spectra of se-Cu2O/Ag b) potentiostatic electrolysis and d) pulsed electrolysis. e) Fourier transforms spectra of Cu K edge EXAFS spectra of se-Cu2O/Ag at OCP, −1.1 V versus RHE under potentiostatic electrolysis and pulsed electrolysis (Ea = +0.4 V vs RHE, ta = tc = 0.5 s) after 90 min of CO2 reduction and the references. f) In situ Raman spectra in the region of 100–700 cm−1 under (left) pulsed electrolysis (Ea = +0.4 V vs RHE, ta = tc = 0.5 s) and (right) potentiostatic electrolysis, respectively, in CO2-saturated 0.1 m KHCO3.