Skip to Main content Skip to Navigation
Theses

Surface Distortion and Electrocatalysis : Structure-Activity Relationships for the Oxygen Reduction Reaction on PtNi/C Nanocatalysts

Abstract : This PhD thesis was initially motivated by the understanding of the peculiar electrocatalytic activity of hollow PtNi/C nanoparticles for the oxygen reduction reaction (ORR). Investigations on the formation and growth mechanism of this novel class of nanocatalysts using operando X-ray and electron-based techniques revealed that, beyond alloying effects, structural disorder is a lever to boost the ORR kinetics on bimetallic nanomaterials. The ‘defects do catalysis’ concept was progressively extended to various PtNi catalyst nanostructures, namely to advanced shape-controlled nanocatalysts from the ORR electrocatalysis landscape thanks to fruitful collaborations with European laboratories. This work shows that, through their distorted surface, microstrained nanomaterials feature unprecedented adsorption chemisorption properties and represent a viable approach to sustainably enhance the ORR activity.
Document type :
Theses
Complete list of metadatas

Cited literature [253 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-02396371
Contributor : Abes Star :  Contact
Submitted on : Friday, December 6, 2019 - 1:02:59 AM
Last modification on : Tuesday, October 6, 2020 - 4:18:02 PM
Long-term archiving on: : Saturday, March 7, 2020 - 12:59:56 PM

File

CHATTOT_2017_archivage.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-02396371, version 1

Collections

Citation

Raphaël Chattot. Surface Distortion and Electrocatalysis : Structure-Activity Relationships for the Oxygen Reduction Reaction on PtNi/C Nanocatalysts. Theoretical and/or physical chemistry. Université Grenoble Alpes, 2017. English. ⟨NNT : 2017GREAI093⟩. ⟨tel-02396371⟩

Share

Metrics

Record views

268

Files downloads

108