The new infrared beamline at NSRL

Efficient Photoelectrochemical Conversion of Methane into Ethylene Glycol by WO3 Nanobar Arrays

“…To fundamentally elucidate the mechanism of PEC CH 4 conversion into EG on WO 3 NB, in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) is employed to monitor reaction intermediates. [32] Four distinct DRIFTS peaks are gradually evolved during the PEC CH 4 conversion under an applied potential of 1.3 V vs. RHE and 365 nm LED light irradiation (Figures 4 a and S23). The…”

Efficient Photoelectrochemical Conversion of Methane into Ethylene Glycol by WO3 Nanobar Arrays

“…To fundamentally elucidate the mechanism of PEC CH 4 conversion into EG on WO 3 NB, in situ diffuse reflectance infrared Fourier-transform spectroscopy (DRIFTS) is employed to monitor reaction intermediates. [32] Four distinct DRIFTS peaks are gradually evolved during the PEC CH 4 conversion under an applied potential of 1.3 V vs. RHE and 365 nm LED light irradiation (Figures 4 a and S23). The prominent peaks at 2853 and 2924 cm À1 exhibit an obvious dependence on PEC duration, which can be attributed to methylene (CH 2 ) symmetric C À H stretching and antisymmetric C À H stretching of EG, [33,34] suggesting the stable production of EG with the PEC duration.…”

Synchrotron-radiation spectroscopic identification towards diverse local environments of single-atom catalysts

“…In isotopelabeling operando SR-FTIR with 18 Besides, SR-FTIR spectra t other peculiar testing demands including low-temperature reection and variable angle reection. 74 For instance, Ye et al precisely tuned the number of Fe atoms to fabricate Fe SAs, Fe 2 and Fe 3 clusters anchored on Ndoped carbon marked as Fe x -N-C by pre-encapsulation and pyrolysis schedules. 159 In low-temperature FTIR spectroscopies (LT-FTIR) aer exposing catalysts to O 2 for 10 min to ensure complete O 2 adsorption, broad peaks located at 1200-1350 cm À1 for Fe 1 -N-C and 800-1000 cm À1 for Fe 2 and Fe 3 -N-C are attributed to the vibrations of adsorbed superoxo-like (akin to Fe-O-O) and peroxo-like (akin to Fe-O-O-Fe) O 2 species respectively.…”

“…73 Experimental reports have demonstrated that SR-FTIR can show exponential signal intensication with respect to traditional FTIR. 74 In conclusion, it is certain that synchrotron-radiation spectral methods are powerful in the identication of local environments of SACs. Hence in this review, we aim to summarize the advancements of multifarious synchrotron-radiation methods in parsing the local environments of SACs.…”