Proceedings of MATSUS Spring 2024 Conference (MATSUS24)
DOI: https://doi.org/10.29363/nanoge.matsus.2024.255
Publication date: 18th December 2023
In context of the growing need for a more sustainable energy sector, the efficient storage of excess energy from intermittent renewable sources is of paramount interest and significant efforts have been devoted to the quest for more efficient electrocatalyst materials for energy conversion and storage devices such as water electrolyzers, fuel cells and batteries. Thus, in-situ studies of promising energy materials in conditions close to real operation are of crucial importance for understanding of the performance-limiting mechanisms occurring at the electrochemical interfaces
Photon-in/photon-out x-ray absorption spectroscopy (XAS) is an established tool to probe the chemical and electronic structure of solid, liquid, and gaseous samples, providing insights into the local density of states of the studied material, e.g. its oxidation state and local geometry around the probed atom. Due to the short attenuation length of x-ray photons, application-tailored sample environments bridging the technical requirements of the method and the electrochemical devices are required to monitor real-world materials in liquids under operating conditions.
In this work, we show operando XAS studies of relevant energy materials in the field of electrocatalysis and battery research, showcasing the opportunities and challenges arising from the use of photons energies ranging from the high to the soft x-ray regime.
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