Support effect on Ni-based mono- and bimetallic catalysts in CO2 hydrogenation

Wang, Jihao; Chen, Shilong; Ticali, Pierfrancesco; Summa, Paulina; Mai, Simon; Skorupska, Katarzyna; Behrens, Malte

doi:10.1039/d4nr02025a

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Support effect on Ni-based mono- and bimetallic catalysts in CO₂ hydrogenation

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Summa, Paulina
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Skorupska, Katarzyna
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Wang, J., Chen, S., Ticali, P., Summa, P., Mai, S., Skorupska, K., et al. (2024). Support effect on Ni-based mono- and bimetallic catalysts in CO₂ hydrogenation. Nanoscale, 16(37), 17378-17392. doi:10.1039/d4nr02025a.

Cite as: https://hdl.handle.net/21.11116/0000-000F-D62E-D

Abstract

Aiming at a comprehensive understanding of support effects on Ni-based bimetallic catalyst for CO₂ hydrogenation, spectroscopy (DRIFTS) with CO as a probe molecule and temperature-programmed techniques were used to investigate the impact of different supports (MgO, CeO₂, ZrO₂) on Ni- and Ni,Fe catalysts. Kinetic parameters revealed that the higher selectivity to methanation for Ni and Ni,Fe supported on the reducible oxides (CeO₂, ZrO₂) is due to the inhibition of reverse water-gas shift reaction (RWGS) by hydrogen. A promoting effect of Fe on Ni was only observed on MgO-supported catalysts. In situ DRIFTS with CO adsorption showed different electronic properties of Ni sites with partially reduced oxide (i.e. ZrO₂ and CeO₂). H₂-TPR and CO₂-TPD confirmed the significant role of metal-support interaction (MSI) in CeO₂-supported catalysts for CO₂ activation. The MSI between Ni/Ni,Fe and reducible supports are crucial for catalytic performance, ultimately leading to the higher activity and stability in CO₂ hydrogenation.