Alkaline-Promoted Pt-CoOx/SBA-15 for Efficient Epoxidation of Styrene (碱促进CoOx/Pt/SBA-15高效催化苯乙烯环氧化)

Characterized samples included fresh catalysts and spent ones (CoOx/Pt/SBA-15-R and CoOx/Pt/SBA-15-Na-R).Catalytic performance data were obtained from styrene epoxidation reactions (80°C, 6 h) with 25 mg catalyst, 5 mmol styrene, 15 mmol TBHP, and 5 mL acetonitrile. Products were quantified by GC (GC9720Plus) using the internal standard method. The dataset records styrene conversion and SO selectivity under various conditions (catalyst types, CoOx cycles, Na₂CO₃ loading, pH), along with five-cycle stability tests.

Turnover frequency (TOF) was calculated based on total Co atoms determined by ICP-OES.Mechanistic data include in-situ DRIFTS dynamic spectra tracking surface species evolution; EPR spin‑trapping experiments (PBN) quantifying tBuOO·, Ph·, and tBuO(PhCON)· radical signals and their relative proportions under different conditions; and 1O2 trapping experiments (TEMP as trap, FFA as quencher) to verify singlet oxygen generation and its role in pathway switching.

Fitting results of EPR hyperfine coupling constants are summarized in Table 1.Theoretical calculation data from DFT include Bader charge analysis (quantifying Pt→Co electron transfer) and projected density of states (PDOS) analysis, revealing Pt‑O‑Co bond formation and interfacial electronic coupling.Data quality: each sample was prepared in at least two batches to ensure reproducibility; GC data are averages of three independent injections with standard deviation <5%; XPS and XAFS were calibrated with standards (CoO, Co3O4).

EPR radical signals were quantified by computer fitting. Supplementary data (N₂ adsorption‑desorption isotherms, pore size distributions, XRD patterns) are archived as Supporting Information (Fig. S1‑S6 and Table S1‑S7). Raw data are saved in common formats (.txt, .csv, .tiff) and can be read by standard software such as OriginLab and Excel.