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N‐Doped Defective Graphene from Biomass as Catalyst for CO 2 Hydrogenation to Methane
Author(s) -
Jurca Bogdan,
Bucur Cristina,
Primo Ana,
Concepción Patricia,
Parvulescu Vasile I.,
García Hermenegildo
Publication year - 2019
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201801984
Subject(s) - catalysis , graphene , pyrolysis , methane , doping , chemistry , activation energy , inorganic chemistry , biomass (ecology) , materials science , nanotechnology , organic chemistry , oceanography , optoelectronics , geology
N‐doped, defective graphene obtained by pyrolysis of chitosan at 900 °C under Ar exhibits catalytic activity for the Sabatier hydrogenation of CO 2 to CH 4 at temperatures about 500 °C with estimated turnover frequencies and activation energy values of 73.17 s −1 and 24.3 kcal×mol −1 , respectively. It has been found that this enhanced catalytic activity compared to other related doped defective graphenes derives from the presence of pyridinic N atoms that adsorbs CO 2 forming carbamate‐type adsorbates.