Platelet Ceria Catalysts from Solution Combustion and Effect of Iron Doping for Synthesis of Dimethyl Carbonate from CO2

Nicoletta Rusta; Valentina Mameli; Pier Carlo Ricci; Stefania Porcu; Panpailin Seeharaj; Aryane A Marciniak; Evelyn C S Santos; Odivaldo Cambraia Alves; Claudio J A Mota; Elisabetta Rombi; Carla Cannas

doi:10.1002/cplu.202400521

Platelet Ceria Catalysts from Solution Combustion and Effect of Iron Doping for Synthesis of Dimethyl Carbonate from CO₂

Chempluschem. 2024 Sep 20:e202400521. doi: 10.1002/cplu.202400521. Online ahead of print.

Authors

Nicoletta Rusta^{1

2}, Valentina Mameli^{1

2}, Pier Carlo Ricci³, Stefania Porcu^{2

3}, Panpailin Seeharaj⁴, Aryane A Marciniak⁵, Evelyn C S Santos⁶, Odivaldo Cambraia Alves⁷, Claudio J A Mota^{5

6

8}, Elisabetta Rombi^{1

2}, Carla Cannas^{1

2}

Affiliations

¹ Department of Chemical and Geological Sciences, University of Cagliari, Cagliari, Italy.
² National Interuniversity Consortium of Materials Science and Technology (INSTM), Florence, Italy.
³ Department of Physics, University of Cagliari, Cagliari, Italy.
⁴ Department of Chemistry, King Mongkut's Institute of Technology Ladkraban, Bangkok, Thailand.
⁵ Escola de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil.
⁶ Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
⁷ Instituto de Química, Universidade Federal Fluminense, Niterói, Brazil.
⁸ INCT Energia & Ambiente, UFRJ, Brazil.

PMID: 39302819
DOI: 10.1002/cplu.202400521

Abstract

Solution combustion (SC) remains among the most promising synthetic strategies for the production of crystalline nanopowders from an aqueous medium, due to its easiness, time and cost-effectiveness, scalability and eco-friendliness. In this work, this method was selected to obtain anisometric ceria-based nanoparticles applied as catalysts for the direct synthesis of dimethyl carbonate. The catalytic performances were studied for the ceria and Fe-doped ceria from SC (CeO₂-SC, Ce_0.9Fe_0.1O₂-SC) in comparison with the ceria nanorods (CeO₂-HT, Ce_0.9Fe_0.1O₂-HT) obtained by hydrothermal (HT) method, one of the most studied systems in the literature. Indeed, the ceria nanoparticles obtained by SC were found to be highly crystalline, platelet-shaped, arranged in a mosaic-like assembly and with smaller crystallite size (≈6 nm vs. ≈17 nm) and higher surface area (80 m² g^-1 vs. 26 m² g^-1) for the undoped sample with respect to the Fe-doped counterpart. Although all samples exhibit an anisometric morphology that should favor the exposition of specific crystalline planes, HT-samples showed better performances due to higher oxygen vacancies concentration and lower amount of strong basic and acid sites.

Keywords: CO2 chemical conversion; Ceria nanoparticles; Dimethyl carbonate; Heterogeneous catalysis; Solution combustion.

Abstract

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