Effects of oxygen functionalities on hydrous hydrazine decomposition over carbonaceous materials

Bellomi, Silvio; Barlocco, Ilaria; Tumiati, Simone; Fumagalli, Patrizia; Dimitratos, Nikolaos; Roldan, Alberto; Villa, Alberto

doi:10.1039/d3dt02310a

Dalton Trans.

2023

DOI: 10.1039/d3dt02310a

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Effects of oxygen functionalities on hydrous hydrazine decomposition over carbonaceous materials

Silvio Bellomi,

Ilaria Barlocco,

Simone Tumiati

et al.

Abstract: Metal-free heterogeneous catalysis is promising in the context of H2 generation. Therefore, establishing structure-activity relationships is a crucial issue to improve the development of more efficient catalysts. Herein, to evaluate...

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2024

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Cited by 2 publications

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Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Adamou,

Bellomi,

Harkou

et al. 2024

Chemical Engineering Journal

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Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Adamou,

Bellomi,

Harkou

et al. 2024

Chemical Engineering Journal

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Probing the Metal/Oxide Interface of IrCoCeO_x in N₂H₄·H₂O Decomposition: An Experimental and Computational Study

Bellomi,

Cano-Blanco,

Barlocco

et al. 2024

ACS Appl. Mater. Interfaces

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Understanding the structure of a functional catalyst is crucial to disclosing the complexity of heterogeneous processes and improving their efficiency. Herein, coprecipitated cobalt−ceria (CoCeO x ) oxides doped with Ir (IrCoCeO x ) were synthesized and used to assess the performances of metal/ oxide interfaces in the N 2 H 4 •H 2 O decomposition performed in aqueous NaOH. Kinetic experiments in batch showed that CoO is the active phase of CoCeO x and that the copresence of Ir and Co (IrCoCeO x ) enhanced H 2 productivity. A comprehensive characterization (X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy, and in situ diffuse reflectance infrared Fourier transform spectroscopy) combined with robust computational modeling based on the density functional theory was employed to attribute the IrCoCeO x performance enhancement to the Ir/CoO metal/oxide interface, the active site of the reaction. On these sites, the improved H 2 productivity in the presence of aqueous NaOH was studied operando through modulated excitation-attenuated total reflectance infrared coupled with phase sensitive detection. The formation of surface Co-hydroxyl and -imido groups at the Ir/CoO interface induced the preferential breakage of the N−H bond of N 2 H 4 •H 2 O, favoring the production of H 2 .

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Effects of oxygen functionalities on hydrous hydrazine decomposition over carbonaceous materials

Abstract: Metal-free heterogeneous catalysis is promising in the context of H2 generation. Therefore, establishing structure-activity relationships is a crucial issue to improve the development of more efficient catalysts. Herein, to evaluate...

Cited by 2 publications

References 54 publications

Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Probing the Metal/Oxide Interface of IrCoCeO_x in N₂H₄·H₂O Decomposition: An Experimental and Computational Study

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Effects of oxygen functionalities on hydrous hydrazine decomposition over carbonaceous materials

Abstract: Metal-free heterogeneous catalysis is promising in the context of H2 generation. Therefore, establishing structure-activity relationships is a crucial issue to improve the development of more efficient catalysts. Herein, to evaluate...

Cited by 2 publications

References 54 publications

Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Hydrous hydrazine decomposition over Rh/Al2O3 catalyst: Experimental and CFD studies

Probing the Metal/Oxide Interface of IrCoCeOx in N2H4·H2O Decomposition: An Experimental and Computational Study

Contact Info

Product

Resources

About

Probing the Metal/Oxide Interface of IrCoCeO_x in N₂H₄·H₂O Decomposition: An Experimental and Computational Study