Open AccessCo–Fe Nanoparticles Wrapped on N-Doped Graphitic Carbons as Highly Selective CO2 Methanation Catalysts
Author(s) -
Bogdan Jurcă,
Lu Peng,
Ana Primo,
Álvaro Gordillo,
Vasile I. Pârvulescu,
Hermenegildo Garcı́a
Publication year - 2021
Publication title -
acs applied materials and interfaces
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.535
H-Index - 228
eISSN - 1944-8252
pISSN - 1944-8244
DOI - 10.1021/acsami.1c05542
Subject(s) - materials science , methanation , catalysis , nanoparticle , selectivity , pyrolysis , alloy , chemical engineering , carbon fibers , graphene , transmission electron microscopy , inorganic chemistry , nanotechnology , metallurgy , composite number , composite material , organic chemistry , chemistry , engineering
Pyrolysis of chitosan containing various loadings of Co and Fe renders Co-Fe alloy nanoparticles supported on N-doped graphitic carbon. Transmission electron microscopy (TEM) images show that the surface of Co-Fe NPs is partially covered by three or four graphene layers. These Co-Fe@(N)C samples catalyze the Sabatier CO 2 hydrogenation, increasing the activity and CH 4 selectivity with the reaction temperature in the range of 300-500 °C. Under optimal conditions, a CH 4 selectivity of 91% at an 87% CO 2 conversion was reached at 500 °C and a space velocity of 75 h -1 under 10 bar. The Co-Fe alloy nanoparticles supported on N-doped graphitic carbon are remarkably stable and behave differently as an analogous Co-Fe catalyst supported on TiO 2 .