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An air-stable, reusable Ni@Ni(OH)2 nanocatalyst for CO2/bicarbonates hydrogenation to formate

Fu, Xin-Pu and Peres, Laurent and Esvan, Jérôme and Amiens, Catherine and Philippot, Karine and Yan, Ning An air-stable, reusable Ni@Ni(OH)2 nanocatalyst for CO2/bicarbonates hydrogenation to formate. (2021) Nanoscale, 19. 8931-8939. ISSN 2040-3364

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Official URL: https://doi.org/10.1039/D1NR01054A


Production of formate via CO2/bicarbonate hydrogenation using cheap metal-based heterogeneous catalysts is attractive. Herein, we report the organometallic synthesis of a foam-like Ni@Ni(OH)2 composite nanomaterial which exhibited remarkable air stability and over 2 times higher catalytic activity than commercial Raney Ni catalyst in formate synthesis. Formate generation was reached with an optimal rate of 6.0 mmol/gcat/h at 100°C, a significantly lower operation temperature compared to the 200-260°C reported in the literature. Deep characterization evidenced that this nanomaterial was made of an amorphous Ni(OH)2 phase covering metallic Ni sites; a core-shell structure which is crucial for the stability of the catalyst. The adsorption of bicarbonates onto the Ni@Ni(OH)2 catalyst was found a kinetically relevant step in the reaction, and the Ni-Ni(OH)2 interface was found beneficial for both CO2 and H2 activation thanks to a cooperative effect. Our findings emphasize the underestimated potential of Ni-based catalysts in CO2 hydrogenation to formate, pointing out a viable strategy to develop stable, cheap metal catalysts for greener catalytic applications.

Item Type:Article
HAL Id:hal-03202677
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > National University of Singapore - NUS (REPUBLIC OF SINGAPORE)
Laboratory name:
Agence nationale de la recherche - ANR (France) - Singapore National Research Foundation - NRF (Singapour)
Deposited On:20 Apr 2021 08:17

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