HEИндивидуална стипендия2023–2025

Double layer · Spectroscopic investigation of the electrochemical interface for sustainable electrocatalysis

„Хоризонт Европа“ — Действия „Мария Склодовска-Кюри“

Период: 2023-04-01 → 2025-03-31
Финансиране от ЕС: 187 624 €
Участници: 1
Схема: HORIZON-TMA-MSCA-PF-EF

Линиите свързват координатора с партньорите.

Накратко на български

Взаимодействията между електродите и течните електролити при преноса на електрони се анализират чрез нов метод за характеризиране. Това помага за по-ефективното превръщане на електричеството в енергия от възобновяеми източници.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Spectroscopic investigation of the electrochemical interface for sustainable electrocatalysis

Developing our tools to achieve a better future through well-defined science has often been the approach of our ever-developing society. Today, a better future is synonymous with favoring a more renewable and cleaner pathway toward large-scale energy production and consumption. This project is presented as one of the many ways toward this goal, that is, through an improved understanding of how to convert electricity into and from renewable feedstock. This understanding relies on our knowledge of the interface where electrons are transferred, typically from an electrode to a reactant, itself often contained in a liquid electrolyte. A principal objective of this project lies in developing a characterization method suitable for probing changes at this electrified solid-liquid interface. Upon optimization of the characterization tool, a subsequent objective of the project was to extract information about the physical and chemical interactions defining the dynamics of the interface. Ultimately, drawing from these results, the project aims to provide guidelines on accounting for those interactions to better steer electron transfers towards the desired reaction with improved efficiency.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

The structure of the double layer at the electrode-electrolyte interface dictates the electrocatalytic performance. A better understanding of the double layer is thus necessary for the optimization of key reactions such as the electrocatalytic hydrogen production and the CO2 electroconversion to value-added products, both of which are central to transitioning to carbon-free fuel alternatives. However, there is currently a significant lack of appropriate characterization methods to resolve this interfacial region. Meanwhile, recent results demonstrate that the models so far employed to predict the physical behavior at the double layer are incomplete. Therefore, for the field of electrocatalysis to reach its performance targets, it is critical we develop new techniques to fill this gap in our understanding of the catalyst-electrolyte interface. In this work, we propose to leverage the unique properties of X-ray photoelectron spectroscopy (XPS) and total electron yield X-ray absorption spectroscopy (TEY-XAS) in a dip-an-pull geometry to resolve the concentration and configuration of the ions and water molecules present in the double layer. Using single crystal electrodes that are well-defined surfaces, we propose to use these spectroscopic insights to verify the nature of non-specific ion-water-electrode interactions suggested by previous electrochemical and computational investigations. Once optimized, we propose to expand the application of this spectroscopic approach to electrocatalytically relevant conditions for the hydrogen evolution reaction on Pt(111) and for the CO2 reduction reaction on Au(111). The as-described methodology will not only provide unprecedented insights into the elusive contribution of the double layer during electrocatalysis, but it will also enable the standardization of a powerful characterization tool that will greatly benefit the field of surface chemistry and catalysis.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITEIT LEIDEN · LeidenКоординаторНидерландия