Liu, Jiongjie ; Tian, Chuanmu ; Jiang, Tianshu ; Ricohermoso, Emmanuel III ; Yu, Zhaoju ; Ionescu, Emanuel ; Molina-Luna, Leopoldo ; Hofmann, Jan P. ; Riedel, Ralf (2023)
Polymer-derived SiOC ceramics: A potential catalyst support controlled by the sintering temperature and carbon content.
In: Journal of the European Ceramic Society, 43 (8)
doi: 10.1016/j.jeurceramsoc.2023.02.045
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
A series of silicon oxycarbide ceramics with varying carbon content from ca. 10 wt% to ca. 40 wt% were prepared by thermal pyrolysis of four commercially available polysiloxanes and subsequent spark plasma sintering (SPS) at 1200 degrees C, 1400 degrees C, and 1600 degrees C. The results showed that the high carbon content led to a porous microstructure, and for SiOC with ca. 40 wt% carbon content, its porosity and specific surface area at 1600 degrees C reached 34% and 262 m(2)/g, respectively. The electrochemical behavior of materials was evaluated. It was shown that SiOC has a certain degree of electrocatalytic activity, and the sample with 10 wt% carbon content obtained at 1200 degrees C exhibited an overpotential of 450 mV vs. RHE at 10 mA.cm(-2) in acid medium. Finally, it was analyzed that the electrochemical behavior of SiOC is closely related to the phase composition and microstructure of the resulting ceramics.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Liu, Jiongjie ; Tian, Chuanmu ; Jiang, Tianshu ; Ricohermoso, Emmanuel III ; Yu, Zhaoju ; Ionescu, Emanuel ; Molina-Luna, Leopoldo ; Hofmann, Jan P. ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Polymer-derived SiOC ceramics: A potential catalyst support controlled by the sintering temperature and carbon content |
| Sprache: | Englisch |
| Publikationsjahr: | Juli 2023 |
| Verlag: | Elsevier |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the European Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 43 |
| (Heft-)Nummer: | 8 |
| DOI: | 10.1016/j.jeurceramsoc.2023.02.045 |
| Kurzbeschreibung (Abstract): | A series of silicon oxycarbide ceramics with varying carbon content from ca. 10 wt% to ca. 40 wt% were prepared by thermal pyrolysis of four commercially available polysiloxanes and subsequent spark plasma sintering (SPS) at 1200 degrees C, 1400 degrees C, and 1600 degrees C. The results showed that the high carbon content led to a porous microstructure, and for SiOC with ca. 40 wt% carbon content, its porosity and specific surface area at 1600 degrees C reached 34% and 262 m(2)/g, respectively. The electrochemical behavior of materials was evaluated. It was shown that SiOC has a certain degree of electrocatalytic activity, and the sample with 10 wt% carbon content obtained at 1200 degrees C exhibited an overpotential of 450 mV vs. RHE at 10 mA.cm(-2) in acid medium. Finally, it was analyzed that the electrochemical behavior of SiOC is closely related to the phase composition and microstructure of the resulting ceramics. |
| Freie Schlagworte: | polymer-derived ceramics, SiOC, porosity, catalyst support, electrochemical properties, oxygen reduction, silicon, energy. nanocomposites, stability, porosity |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Elektronenmikroskopie 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 26 Apr 2023 07:24 |
| Letzte Änderung: | 26 Apr 2023 07:24 |
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