Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.065
Publication date: 18th December 2023
The electrocatalytic reduction of CO2 (CO2RR) into valuable base chemicals and fuels is a very complex reaction that depends on the intimate relation between catalyst structure and external reaction conditions.[1] Despite considerable progress over the past few years, it is evident that the precise identification of the active sites of the electrocatalyst under operation remains a challenge, which hinders the rational design and industrial application of advanced electrocatalysts for eCO2RR. For this purpose, in situ characterization techniques are required that probe the catalyst structure, from bulk to surface, with improved time and space resolution.
In this presentation, I will discuss how we deploy in situ time-resolved Raman spectroscopy (TR-SERS) and advanced in situsynchrotron-based X-ray scattering and spectroscopy techniques to investigate the electrocatalytic activation of CO2 and the dynamic chemical structure of the electrode surface.[2,3] We have combined TR-SERS with cyclic voltammetry, chronoamperometry and pulsed electrolysis to study the time- & potential-dependent behavior of the electrode surface and the adsorbed species.[4] Furthermore, we deployed TR-SERS mapping to elucidate spatiotemporal heterogeneities of copper electrodes at work.[5] Finally, we used in situ small- and wide-angle X-ray scattering to couple the dynamic structure of the electrocatalyst to the performance for well-defined copper oxide nanoparticle electrodes.
References
[1] S. Nitopi et al. Chem. Rev. 2019, 119, 7610.
[2] H. An et al. Angew. Chem. Int. Ed. 2021, 60, 16576.
[3] S. Yang et al. Nat. Catal 2023, 6, 796.
[4] J. de Ruiter et al. J. Am. Chem. Soc. 2022, 144, 15047.
[5] H. An, J. de Ruiter et al. JACS Au 2023, 3, 1890.
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