Active Site Determination in Pyrolyzed M-N-C Electrocatalysts by Gas-sorption
- Metal and nitrogen-doped carbons (M-N-Cs) with M-N4 moieties as the generally accepted active sites, have gradually reached promising levels of activity towards crucial electrochemical reactions like the oxygen reduction reaction (ORR) and carbon dioxide reduction reaction (CO2RR). Even the metal-free counterparts, the nitrogen-doped carbons (NDCs), are common and well-studied electrocatalysts for ORR in alkaline media. In these disordered porous materials, the characterization and quantification of (M)N4 sites can be challenging and time-consuming, with many spectroscopic methods drastically overestimating their site accessibility for catalytic applications. In this study, we explore an alternative approach towards active site characterization and quantification in M-N-Cs based on multi-Langmuir analysis of CO2-sorption isotherms at low pressures, with support fromelectronic DFT calculations.
| Autor*innen: | Jian Liang LowORCiD |
|---|---|
| Koautor*innen: | Tim-Patrick FellingerORCiD, Simon Dietzmann, Asad Mehmood, Shu-Han WuORCiD, Carsten PrinzORCiD, Ana de Oliveira Guilherme BuzanichORCiD, Jörg RadnikORCiD |
| Dokumenttyp: | Posterpräsentation |
| Veröffentlichungsform: | Präsentation |
| Sprache: | Englisch |
| Jahr der Erstveröffentlichung: | 2025 |
| Organisationseinheit der BAM: | 3 Gefahrgutumschließungen; Energiespeicher |
| 3 Gefahrgutumschließungen; Energiespeicher / 3.6 Elektrochemische Energiematerialien | |
| DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Angewandte Physik |
| Freie Schlagwörter: | Active Site Characterization; Active-Site Imprinting; Gas sorption; Metal- and Nitrogen Doped Carbon (M-N-C) |
| Themenfelder/Aktivitätsfelder der BAM: | Energie |
| Energie / Elektrische Energiespeicher und -umwandlung | |
| Veranstaltung: | Electrolyser and Fuel Cell Forum 2025 |
| Veranstaltungsort: | Lucerne, Switzerland |
| Beginndatum der Veranstaltung: | 01.07.2025 |
| Enddatum der Veranstaltung: | 04.07.2025 |
| Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
| Datum der Freischaltung: | 15.12.2025 |
| Referierte Publikation: | Nein |

