Microscopic Surface Dynamics of Pt and Pt Alloy Electrocatalysts under operation conditions

Información del proyecto

DYNECAT

Identificador del acuerdo de subvención: 661145

DOI

10.3030/661145

Proyecto cerrado

Fecha de la firma de la CE 12 Marzo 2015

Fecha de inicio 1 Abril 2015

Fecha de finalización 31 Marzo 2017

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 165 598,80

Aportación de la UE

€ 165 598,80

Coordinado por

UNIVERSITEIT LEIDEN
Netherlands

Periodic Reporting for period 1 - DYNECAT (Microscopic Surface Dynamics of Pt and Pt Alloy Electrocatalysts under operation conditions)

Período documentado: 2015-04-01 hasta 2017-03-31

Resumen del contexto y de los objetivos generales del proyecto

Fuel cell is a promising solution towards the urgent issues of energy and environment in modern society, which produces energy in a mild and efficient way from fossil fuel. However, it has been found that the platinum-based electrocatalyst degrades during the operation of fuel cell, which highly limits the performance and life time of fuel cell. The degradation is thought to be from the over-oxidation of platinum-based electrocatalyst of the cathode. The project is aiming to understand the degradation of Pt-based on the operation conditions by characterizing the surface morphology and surface species at the intermediate stage of electrochemical oxidation.

Trabajo realizado desde el comienzo del proyecto hasta el final del período abarcado por el informe y los principales resultados hasta la fecha

In-situ shell-isolated nanoparticle-enhanced Raman spectroscopy has been performed on single crystalline Pt and polycrystalline Pt to collect the fingerprint of the surface species at the intermediates
Electrochemical voltammetry has been performed to correlate the studies of electrochemical oxidation with that of UHV-based surface science on single crystalline.
A new reference electrode with an accurate potential has been made for the scanning tunneling microscopic (STM) measurement.
The in-situ STM study on single crystalline Pt(111) has been made to study the morphology during electrochemical oxidation.

Avances que van más allá del estado de la técnica e impacto potencial esperado (incluida la repercusión socioeconómica y las implicaciones sociales más amplias del proyecto hasta la fecha)

For the first time, the surface species on single and poly crystalline Pt at the intermediate stage is revealed. The studies on Pt surface oxides by electrochemistry are correlated with that of UHV-based surface science regarding the similarity and difference, which motivates scientists to think about how to comprehensively correlate the surface electrochemistry with surface science.

Overview on the project