In:
Journal of Materials Chemistry A, Royal Society of Chemistry (RSC), Vol. 11, No. 22 ( 2023), p. 11874-11888
Abstract:
Iron phthalocyanine-coated hexagonal boron nitride (FePc/h-BN) nanoparticles, obtained by FePcCl adsorption on the h-BN surface from a dimethylformamide solution, were subjected to heat treatment in order to form single atom Fe 1 /h-BN catalysts. Samples were characterized by means of X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, scanning and transmission electron microscopy, and temperature-programmed oxidation/reduction/desorption. The FePc deposition process was optimized to avoid the formation of nanoparticles. FePc exhibits high thermal stability in a hydrogen atmosphere and decomposes into a single iron atom when oxidizing in an O 2 flow at 350 °C (sample Fe 1 -ox/h-BN). Subsequent reductive heat treatment in hydrogen (sample Fe 1 -red/h-BN) results in the formation of Fe-based nanoparticles due to Fe 1 diffusion and association, resulting in a decrease in catalytic activity. Hydrogenation proceeds according to the Eley–Rideal mechanism with CO 2 chemisorption on the Fe 1 surface species (Fe 1 -ox/h-BN) and is changed to the Langmuir–Hinshelwood mechanism (Fe 1 -red/h-BN). Selectivity for hydrocarbons increases after reduction of the Fe 1 -ox/h-BN sample. Our results open up new possibilities for using metal phthalocyanine as a precursor for cheap, reproducible, and efficient single atom catalysts for CO 2 hydrogenation.
Type of Medium:
Online Resource
ISSN:
2050-7488
,
2050-7496
Language:
English
Publisher:
Royal Society of Chemistry (RSC)
Publication Date:
2023
detail.hit.zdb_id:
2702232-8
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