Feng, Yao ; Yu, Zhaoju ; Schuch, Jona ; Tao, Shasha ; Wiehl, Leonore ; Fasel, Claudia ; Jaegermann, Wolfram ; Riedel, Ralf (2020)
Nowotny phase Mo3+2xSi3C0.6 dispersed in a porous SiC/C matrix: A novel catalyst for hydrogen evolution reaction.
In: Journal of the American Ceramic Society, 103 (1)
doi: 10.1111/jace.16731
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The ternary Nowotny phase (NP), with a composition Mo3+2xSi3C0.6 (x = 0.9‐0.764), is found to be catalytically active in the field of electrochemical water splitting. The NP embedded in a porous SiC/C nanocomposite matrix is synthesized via a single‐source‐precursor approach which involves the reaction of allylhydridopolycarbosilane with MoO2(acac)2. Thermal treatment of the single‐source‐precursor up to 1400°C in a protective atmosphere results in the in situ formation of nanocrystalline Mo3+2xSi3C0.6 immobilized in a thermally and corrosion‐stable SiC/C matrix. The weight fractions of the observed crystalline phases Mo3+2xSi3C0.6 and SiC amount to ca. 28 (26) and 72 (74) wt%, respectively, when prepared at 1400°C (1350°C). The porosity of the formed nanocomposite is adjusted by the addition of polystyrene (PS) as a pore former to the single‐source‐precursor resulting in a specific surface area up to 206 m2/g. The electrocatalytic activity of the Mo3+2xSi3C0.6/C/SiC nanocomposite with respect to the hydrogen evolution reaction (HER) is characterized by low over potentials of 22 and 138 mV vs reversible hydrogen electrode (RHE) for applying 1 and 10 mA cm−2 of current density, respectively. The analyzed electrocatalytic performance exceeds that of most Mo‐based electrocatalysts and shows high stability (over 90%) during 35 hours.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2020 |
| Autor(en): | Feng, Yao ; Yu, Zhaoju ; Schuch, Jona ; Tao, Shasha ; Wiehl, Leonore ; Fasel, Claudia ; Jaegermann, Wolfram ; Riedel, Ralf |
| Art des Eintrags: | Bibliographie |
| Titel: | Nowotny phase Mo3+2xSi3C0.6 dispersed in a porous SiC/C matrix: A novel catalyst for hydrogen evolution reaction |
| Sprache: | Englisch |
| Publikationsjahr: | Januar 2020 |
| Verlag: | Wiley |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of the American Ceramic Society |
| Jahrgang/Volume einer Zeitschrift: | 103 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1111/jace.16731 |
| URL / URN: | https://ceramics.onlinelibrary.wiley.com/doi/full/10.1111/ja... |
| Kurzbeschreibung (Abstract): | The ternary Nowotny phase (NP), with a composition Mo3+2xSi3C0.6 (x = 0.9‐0.764), is found to be catalytically active in the field of electrochemical water splitting. The NP embedded in a porous SiC/C nanocomposite matrix is synthesized via a single‐source‐precursor approach which involves the reaction of allylhydridopolycarbosilane with MoO2(acac)2. Thermal treatment of the single‐source‐precursor up to 1400°C in a protective atmosphere results in the in situ formation of nanocrystalline Mo3+2xSi3C0.6 immobilized in a thermally and corrosion‐stable SiC/C matrix. The weight fractions of the observed crystalline phases Mo3+2xSi3C0.6 and SiC amount to ca. 28 (26) and 72 (74) wt%, respectively, when prepared at 1400°C (1350°C). The porosity of the formed nanocomposite is adjusted by the addition of polystyrene (PS) as a pore former to the single‐source‐precursor resulting in a specific surface area up to 206 m2/g. The electrocatalytic activity of the Mo3+2xSi3C0.6/C/SiC nanocomposite with respect to the hydrogen evolution reaction (HER) is characterized by low over potentials of 22 and 138 mV vs reversible hydrogen electrode (RHE) for applying 1 and 10 mA cm−2 of current density, respectively. The analyzed electrocatalytic performance exceeds that of most Mo‐based electrocatalysts and shows high stability (over 90%) during 35 hours. |
| Freie Schlagworte: | Ceramic nanocomposites; electrocatalytic activity; hydrogen evolution reaction; Nowotny phase; single-source-precursor; Molybdenum phosphide nanoparticles; efficient electrocatalyst; carbon nanotubes, carbide; composites; ceramics |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Disperse Feststoffe 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung |
| Hinterlegungsdatum: | 30 Okt 2019 07:53 |
| Letzte Änderung: | 04 Nov 2019 06:39 |
| PPN: | |
| Projekte: | China Scholarship Council, Grant Number: 201606310021, National Natural Science Foundation of China, Grant Number: 51872246, Alexander von Humboldt Foundation, Creative Research Foundation of Science, Technology on Thermostructural Composite Materials Laboratory, Grant Number: 6142911040114 |
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