RT journal article
T1 Enhanced stability of sub-nanometric iridium decorated graphitic carbon nitride for H2 production upon hydrous hydrazine decomposition†
A1 Bellomi, Silvio
A1 Barlocco, Ilaria
A1 Chen, Xiaowei
A1 Delgado Jaén, Juan José
A1 Arrigo, Rosa
A1 Dimitratos, Nikolaos
A1 Roldan, Alberto
A1 Villa, Alberto
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 Carbon nitride
K1 Catalyst poisoning
K1 Electronic structure
K1 Genetic algorithms
K1 High resolution transmission electron microscopy
K1 Hydrazine
K1 Hydrogen production
K1 Metal nanoparticles
K1 X ray photoelectron spectroscopy
AB Stabilizing metal nanoparticles is vital for large scale implementations of supported metal catalysts, particularly for a sustainable transition to clean energy, e.g., H2 production. In this work, iridium sub-nanometric particles were deposited on commercial graphite and on graphitic carbon nitride by a wet impregnation method to investigate the metal-support interaction during the hydrous hydrazine decomposition reaction. To establish a structure-activity relationship, samples were characterized by transmission electron microscopy and X-ray photoelectron spectroscopy. The catalytic performance of the synthesized materials was evaluated under mild reaction conditions, i.e. 323 K and ambient pressure. The results showed that graphitic carbon nitride (GCN) enhances the stability of Ir nanoparticles compared to graphite, while maintaining remarkable activity and selectivity. Simulation techniques including Genetic Algorithm geometry screening and electronic structure analyses were employed to provide a valuable atomic level understanding of the metal-support interactions. N anchoring sites of GCN were found to minimise the thermodynamic driving force of coalescence, thus improving the catalyst stability, as well as to lead charge redistributions in the cluster improving the resistance to poisoning by decomposition intermediates.
PB Royal Society of Chemistry
SN 1463-9076
YR 2022
FD 2022-11-30
LK http://hdl.handle.net/10498/29630
UL http://hdl.handle.net/10498/29630
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 21-sep-2026