Insights Into The Dynamics Of Liquid Metal Nanoparticles During CO2 Reduction Reaction Using In-Situ Electrochemical Liquid Phase TEM

Krishna Kumar^a, Coline Boulanger^a, Seyedmohamadjavad Chabok^a, Anna Loiudice^a, Raffaella Buonsanti^a

^aLaboratory of Nanochemistry for Energy (LNCE), Institute of Chemical Sciences and Engineering (ISIC), Ecole Polytechnique Fédérale de Lausanne, Sion, CH-1950, Switzerland

Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Fall 2024 Conference (MATSUSFall24)

#PECCO2 - Advances in (Photo)Electrochemical CO2 Conversion to Chemicals and Fuels

Lausanne, Switzerland, 2024 November 12th - 15th

Organizers: Deepak PANT, Adriano Sacco and juqin zeng

Poster, Krishna Kumar, 375
Publication date: 28th August 2024

Gallium (Ga)-based liquid metals (LM) have recently emerged as a promising class of advanced material due to their unique physicochemical properties, including high electrical and thermal conductivities, combined with water-like fluidity [1]. Nanoparticles of Ga and its alloys exhibit a liquid metallic core surrounded by a native oxide skin [2]. These materials have gained significant attention as electrocatalysts, particularly for their dynamic surfaces and inherent resistance to coke formation, attributed to the reconfigurable nature of the oxide layer [3-4]. However, the relationship between the structural evolution of LM-based catalysts and their catalytic activity remains unexplored. Understanding the dynamic interactions that drive reactions is crucial for further development as LM-based reconfigurable catalysts.
In this work, we utilize in-situ electrochemical liquid-phase TEM to study the dynamic evolution of liquid metal nanoparticles under near-operating CO2 reduction conditions. We will demonstrate how Ga-based nanoparticles evolve as a function of size and applied potential, providing insights into the structural changes under CO2 reduction conditions.

References:

[1] Daeneke, T.; Khoshmanesh, K.; Mahmood, N.; De Castro, I. A.; Esrafilzadeh, D.; Barrow, S. J.; Dickey, M. D.; Kalantar-Zadeh, K. Liquid Metals: Fundamentals and Applications in Chemistry, Chem. Soc. Rev. 2018, 47, 4073– 4111

[2] Martin, A.; Du, C.; Chang, B.; Thuo, M. Complexity and Opportunities in Liquid Metal Surface Oxides. Chem. Mater. 2020, 32, 9045– 9055

[3] Okatenko, V.; Loiudice, A.; Newton, M. A.; Stoian, D. C.; Blokhina, A.; Chen A. N.; Rossi, K.; Buonsanti, R. Alloying as a Strategy to Boost the Stability of Copper Nanocatalysts during the Electrochemical CO2 Reduction Reaction. J. Am. Chem. Soc. 2023, 125, 9, 5370-5383

[4] Okatenko, V.; Castilla-Amorós, L.; Stoian, D. C.; Vávra, J.; Loiudice, A.; Buonsanti, R. The Native Oxide Skin of Liquid Metal Ga Nanoparticles Prevents Their Rapid Coalescence during Electrocatalysis. J. Am. Chem. Soc. 2022, 144, 10053–10063

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