CuGa Nanoparticles as Stable Electrocatalysts for the CO2 Reduction Reaction
Coline Boulanger a, Petru P. Albertini a, Valery Okatenko a, Alexander Chen a, Raffaella Buonsanti a
a École Polytechnique Fédérale de Lausanne (EPFL), Station 6, LAUSANNE, Switzerland
Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS23 & Sustainable Technology Forum València (STECH23) (MATSUS23)
#e-FuelSyn - Electrocatalysis for the Production of Fuels and Chemicals
València, Spain, 2023 March 6th - 10th
Organizers: Carla Casadevall Serrano and Julio Lloret Fillol
Poster, Coline Boulanger, 317
Publication date: 22nd December 2022

Metallic nanocatalysts with little reconstruction during operation and resistance to coking are highly desired in heterogenous catalysis, although quite rare. Liquid metals (LMs) and especially Ga-based LMs have recently drawn attention in electrocatalysis due to their stability [1] and coking-resistant dynamic surface. At the same time the electrochemical CO2 reduction reaction (CO2RR) into valuable chemical products has known growing interest as it holds the promise of closing the carbon loop. However, the only mono-elemental catalyst able to access C2+ products (i.e. copper) through CO2RR cruelly lacks of stability and undergoes reconstruction during operation [2,3].

Herein, we propose CuGa nanoparticles as stable CO2RR electrocatalysts. We use colloidal chemistry to synthesize different nanostructures, ranging from alloys to heterodimers and Cu-doped Ga [4]. We combine this state of the art synthetic methodology with electrocatalytic measurements and different characterization techniques to investigate the stability of these catalysts. Finally, we propose a general framework to confer stability to CO2RR catalysts in the future.

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