Ecole Doctorale
SCIENCES CHIMIQUES - Marseille
Spécialité
Sciences Chimiques
Etablissement
Aix-Marseille Université
Mots Clés
Matériaux à base de carbone,Nanomatériaux,Piles à combustible,Réactions électrochimiques,Electrodes,Ionomères
Keywords
Carbon based materials,Nanomaterials,Fuel cells,Electrochemical reactions,Electrodes,Ionomers
Titre de thèse
Points quantiques de carbone comme électrocatalyseurs pour la réaction de réduction de l'oxygène
Carbon Quantum Dots as Electrocatalysts for the Oxygen Reduction Reaction
Date
Jeudi 15 Décembre 2022
Adresse
Università di Roma Tor Vergata
Dip. Ingegneria Industriale
Via del Politecnico 1
00133 Roma, Italy Aula Pitagora
Jury
| Directeur de these |
M. Philippe KNAUTH |
Aix Marseille Université |
| Rapporteur |
M. Piotr RUTKOWSKI |
Wroclaw University of Science and Technology |
| Rapporteur |
M. José Ramon GALAN-MESCAROS |
Institut Catala d'Investigatio Quimica |
| CoDirecteur de these |
Mme Maria Luisa DI VONA |
Università di Roma Tor Vergata |
| Examinateur |
M. Roberto MONTANARI |
Università di Roma Tor Vergata |
| Examinateur |
M. Luca PASQUINI |
Aix Marseille Université |
Résumé de la thèse
Carbon quantum dots (CQD) are a fascinating nanomaterial and a potential metal-free catalyst for the oxygen reduction reaction to replace the precious Pt-based catalysts in numerous energy applications, such as zinc-air batteries and fuel cells. Detailed performance investigations were conducted with CQD containing different dopants (B, Si, N, S), exploring different synthesis methods and electrochemical tests. The CQD were synthesized from non-toxic precursors mainly through the hydrothermal method. Among the dopants, the B-N co-doped CQD showed the best electrocatalytic activity. Studies were also conducted on composite electrodes with a combination of B-N CQDs and five anion conducting polymers (ionomers) with different backbone structures and side chain lengths. The best electrocatalytic activity was observed with ionomers containing the functional ionic group on a long side chain, which provided performances close to commercial benchmark Pt/C cloth.
Thesis resume
Carbon quantum dots (CQD) are a fascinating nanomaterial and a potential metal-free catalyst for the oxygen reduction reaction to replace the precious Pt-based catalysts in numerous energy applications, such as zinc-air batteries and fuel cells. Detailed performance investigations were conducted with CQD containing different dopants (B, Si, N, S), exploring different synthesis methods and electrochemical tests. The CQD were synthesized from non-toxic precursors mainly through the hydrothermal method. Among the dopants, the B-N co-doped CQD showed the best electrocatalytic activity. Studies were also conducted on composite electrodes with a combination of B-N CQDs and five anion conducting polymers (ionomers) with different backbone structures and side chain lengths. The best electrocatalytic activity was observed with ionomers containing the functional ionic group on a long side chain, which provided performances close to commercial benchmark Pt/C cloth.
