e-Refinery Lecture: Green hydrogen for industry in Luxembourg and the Greater Region – opportunities and challenges
03 October 2023 12:30 till 13:30 | Add to my calendar
Every first Tuesday of each month we organize an e-Refinery Lecture. On October 3 we will have the lecture
Speaker: Ward van der Stam – Utrecht University
Title: Probing the dynamics of CO2 electrolysis with X-rays and Raman spectroscopy
Time: 12:45 - 13:45h (CET)
Abstract:
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 situ synchrotron-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.
Location and zoom link will follow after registration.
The e-Refinery Team
https://www.tudelft.nl/e-refinery/online-lectures
