Fig. 2: Characterization of the catalysts. | Nature Chemistry

Fig. 2: Characterization of the catalysts.

From: Upcycling of polyethylene to gasoline through a self-supplied hydrogen strategy in a layered self-pillared zeolite

Fig. 2

a, High-resolution transmission electron microscopy images of LSP-Z100 and HZSM-5, showing layered self-pillared structure of LSP-Z100. Intermittent lattice fringes (white arrowheads) suggest that mesopores exist throughout LSP-Z100. Note that three sets of transmission electron microscopy images were taken at different magnifications. b, X-ray diffraction patterns of LSP-Z100 and HZSM-5. c, N2 adsorption/desorption isotherms of LSP-Z100 and HZSM-5. d, 1H–29Si cross-polarization/Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) spectra of LSP-Z100 and HZSM-5, and de-convolution of 29Si-NMR spectra by Gaussian line shapes. e, Solid-state 27Al NMR spectra of LSP-Z100 and HZSM-5. f, IR spectra before and after adsorption of pyridine at variable temperatures on LSP-Z100 and HZSM-5. The dashed lines indicate vibrational peaks of pyridine molecules adsorbed on Brönsted acid sites (1545 cm–1) and Lewis acid sites (1455 cm–1). g, IR spectra before and after adsorption of DTBPy at 150 °C on LSP-Z100 and HZSM-5. The dashed lines indicate vibrational peaks of zeolite silanol group (3740 cm–1), Brönsted acid site (3160 cm–1) and adsorbed DTBPy molecule (3370, 1616 and 1530 cm−1). a.u., arbitrary units.

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