CO2 Methanation over Cobalt Nanoparticles Embedded in ZIF-L-Derived Porous Carbon
(2023) ChemCatChem (Online) — Vol. 15, p. e202201338 (2023)
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- Catalytic hydrogenation of CO2 into CH4 is an effective method to convert waste CO2 and green hydrogen into clean fuel on a large scale. However, the viability of such process largely relies on the development of highly active heterogeneous catalysts. Here, a tailored methanation catalyst, Co nanoparticles immobilized into a highly porous N-doped carbon matrix, is prepared by the carbonization of a cobalt-based layered zeolitic imidazolate framework (ZIF-L) material under an argon atmosphere. This catalyst displays a specific activity of 22.3 molCH4/gcat.min at 350°C, significantly outperforming a similar catalyst derived from the more conventional ZIF-67 (11.7 molCH4/gcat.min). This is explained by the stabilization of small Co nanoparticles (~20 nm) and by the presence of abundant medium-strength basic sites related to the nitrogen doping in the catalyst prepared from ZIF-L. Notably, the new catalyst shows high stability; no deactivation is observed up to 60 hours on stream.
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Gholampour, N., Zhao, Y., Devred, F., Sassoye, C., Casale, S., & Debecker, D. (2023). CO2 Methanation over Cobalt Nanoparticles Embedded in ZIF-L-Derived Porous Carbon. ChemCatChem (Online), 15, e202201338. https://doi.org/10.1002/cctc.202201338 (Original work published 2023)