Fundamental Research into Understanding the Molecular structure of eleKtrochemical INterfaces

Informations projet

FRUMKIN

N° de convention de subvention: 101019998

DOI

10.3030/101019998

Date de signature de la CE 13 Juin 2021

Date de début 1 Novembre 2021

Date de fin 31 Octobre 2026

Financé au titre de

• EXCELLENT SCIENCE - European Research Council (ERC)

Coût total

€ 2 500 000,00

Contribution de l’UE

€ 2 500 000,00

Coordonné par

UNIVERSITEIT LEIDEN
Netherlands

Periodic Reporting for period 2 - FRUMKIN (Fundamental Research into Understanding the Molecular structure of eleKtrochemical INterfaces)

Période du rapport: 2023-05-01 au 2024-10-31

Résumé du contexte et des objectifs généraux du projet

The Frumkin project aims to develop and formulate new models for the interface between a metal or a metal-oxide and an aqueous electrolyte solution. We address this issue by a combination of detailed electrochemical experiments, various kinds of spectroscopy and microscopy, as well as state-of-the-art (ab initio) quantum-chemical modeling.
Understanding this interface in atomic and molecular-level detail is important for the development of more efficient and durable electrolysers and batteries.

Travail effectué depuis le début du projet jusqu’à la fin de la période considérée dans le rapport et principaux résultats atteints jusqu’à présent

The project has started to work on the electrode-electrolyte interface of three important electrode materials: gold (as a model supposedly inert surface), platinum (as a practically relevant electrode material), and iron-oxide (as model oxide surface). Main results so far:
- Detailed characterization of Au(111) in relation to surface structure as imaged by electrochemical scanning tunneling microscopy
- Double layer model of stepped Pt single-crystal electrodes, both experiment and simulation
- Detailed understanding of the hitherto unrecognized issues in accurately measuring double-layer capacitance of single crystals
- Detailed characterization of a model single-crystalline Fe2O3 oxide electrode
- Development of (synchrotron-based) X-Ray methodology to probe metal-electrolyte interfaces
- Development of in situ Sum Frequency Generation spectroscopy to probe metal-electrolyte interfaces, in collaboration with AMOLF
- Development of simulation methodology for studying metal-electrolyte interfaces

Progrès au-delà de l’état des connaissances et impact potentiel prévu (y compris l’impact socio-économique et les conséquences sociétales plus larges du projet jusqu’à présent)

- New model for the double layer of platinum, which is significantly more detailed and consistent than any previous model
- For gold, we have laid the basis for a similarly new model, having fully characterized Au(111).
- Understanding hitherto unrecognized issues in accurately measuring double-layer capacitance of single crystals
- Development and testing of (synchrotron-based) X-Ray methodology to probe metal-electrolyte interfaces; this will take this methodology significantly beyond the state-of-the-art
- Development of in situ Sum Frequency Generation spectroscopy to probe metal-electrolyte interfaces, in collaboration with AMOLF; this will take this methodology significantly beyond the state-of-the-art
- Expected novel models for oxide-electrolyte interfaces
- Detailed new understanding of metal-non aqueous electrolyte interfaces

Pt553-water interface