Chemical and Spatial Dual-Confinement Engineering for Antisintering Bimetal Cluster Catalyst: Framework Zinc-Stabilized Pt–(O–Zn) x Sites for Propane Dehydrogenation
Chemical and Spatial Dual-Confinement Engineering for Antisintering Bimetal Cluster Catalyst: Framework Zinc-Stabilized Pt–(O–Zn) x Sites for Propane Dehydrogenation
研究概述
结合分级ZSM-5孔道与骨架Zn的空间、化学双重限域，微波辅助一步水热合成约1.2 nm PtZn团簇。600℃、空速3 h−1下丙烷转化率约60%、丙烯选择性超过96%；Pt–(O–Zn)x位点提升活性与抗烧结能力，策略可拓展至RhZn及IrZn体系。
谱图与表征信息
Figure 3. (a) Pt 4d and (b) Zn 2p XPS spectra of the catalysts. (c) Normalized Pt L3-edge XANES and (d) EXAFS spectra of the Pt@ZSM-5 and PtZn@ZSM-5 catalysts, and reference Pt foil and PtO2. (e) WT contour plots for Pt@ZSM-5, PtZn@ZSM-5, Pt foil, and PtO2. Normalized Zn K- edge (f) XANES and (g) EXAFS spectra of the PtZn@ZSM-5 catalyst and reference Zn foil and ZnO.