Isolated Pt sites anchored by skeletal Fe in MFI zeolite nanosheets towards productive propane dehydrogenation
Isolated Pt sites anchored by skeletal Fe in MFI zeolite nanosheets towards productive propane dehydrogenation
研究概述
通过一锅法将Pt–O–Fe位点锚定于含骨架Fe(III)的MFI沸石纳米片，提升丙烷脱氢活性与稳定性。0.3Pt2Fe@NS在550℃下丙烯生产率48.0 mmol/(g·h)、选择性超过95%，持续30小时，并可再生使用。
谱图与表征信息
Fig. 2. Characterization of as-prepared PtFe bimetallic catalysts. (a) H2-TPR profiles. (b) Pyridine-adsorbed IR spectra at 350 °C. (c) In-situ DRIFT spectra of CO adsorption on fresh (solid line) and reduced (dashed line) samples. Fe K-edge XANES (d) and EXAFS (e) spectra of 0.3Pt2Fe@NS sample under different treatment (F, R, S represent fresh, reduced, and spent sample after 30 h of PDH reaction, respectively). (f) Full-range EXAFS WT 2D plots for Fe-foil, Fe2O3, and 0.3Pt2Fe@NS catalyst.