Gort, Christopher ; Buchheister, Paul W. ; Klingenhof, Malte ; Paul, Stephen D. ; Dionigi, Fabio ; Krol, Roel van de ; Kramm, Ulrike I. ; Jaegermann, Wolfram ; Hofmann, Jan P. ; Strasser, Peter ; Kaiser, Bernhard (2023)
Effect of Metal Layer Support Structures on the Catalytic Activity of NiFe(oxy)hydroxide (LDH) for the OER in Alkaline Media.
In: ChemCatChem, 2023, 15 (8)
doi: 10.26083/tuprints-00024292
Artikel, Zweitveröffentlichung, Verlagsversion
 | Es ist eine neuere Version dieses Eintrags verfügbar. |
Kurzbeschreibung (Abstract)
Photoelectrochemical (PEC) cells promise to combine the benefits of photovoltaics and electrolysis in one device. They consist of a photoabsorber functionalized with an electrocatalyst to harvest faradaic currents under reduced overpotentials. To protect the absorber from the harsh reaction conditions, a protective buffer layer (e. g. TiO₂) is added between absorber and catalyst. In this work, we investigate the influence of the catalyst support systems Ti/TiOₓ and Ti/TiOₓ/M (M=Au, Ni, Fe) on the overall activity and stability of nickel and iron mixed layered double hydroxides for the alkaline oxygen evolution reaction (OER). The catalyst performance on the bare Ti/TiOₓ substrate is very poor, but the incorporation of a metallic interlayer leads to two orders of magnitude higher OER current densities. While a similar effect has been observed for M=gold supported systems, we show that the same effect can be achieved with M=nickel/iron, already contained in the catalyst. This proprietary metal interlayer promises a cheap OER performance increase for PEC cells protected with titania buffer layers. Detailed XPS show an improved transformation of the starting catalyst material into the highly active (oxy)hydroxide phase, when using metallic interlayers. From these experiments a pure conductivity enhancement was excluded as possible explanation, but instead an additional change in the local atomic and electronic structure at the metal‐support and metal‐catalyst interfaces is proposed.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2023 |
| Autor(en): | Gort, Christopher ; Buchheister, Paul W. ; Klingenhof, Malte ; Paul, Stephen D. ; Dionigi, Fabio ; Krol, Roel van de ; Kramm, Ulrike I. ; Jaegermann, Wolfram ; Hofmann, Jan P. ; Strasser, Peter ; Kaiser, Bernhard |
| Art des Eintrags: | Zweitveröffentlichung |
| Titel: | Effect of Metal Layer Support Structures on the Catalytic Activity of NiFe(oxy)hydroxide (LDH) for the OER in Alkaline Media |
| Sprache: | Englisch |
| Publikationsjahr: | 2023 |
| Ort: | Darmstadt |
| Publikationsdatum der Erstveröffentlichung: | 2023 |
| Verlag: | Wiley-VCH |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | ChemCatChem |
| Jahrgang/Volume einer Zeitschrift: | 15 |
| (Heft-)Nummer: | 8 |
| Kollation: | 10 Seiten |
| DOI: | 10.26083/tuprints-00024292 |
| URL / URN: | https://tuprints.ulb.tu-darmstadt.de/24292 |
| Zugehörige Links: | |
| Herkunft: | Zweitveröffentlichung DeepGreen |
| Kurzbeschreibung (Abstract): | Photoelectrochemical (PEC) cells promise to combine the benefits of photovoltaics and electrolysis in one device. They consist of a photoabsorber functionalized with an electrocatalyst to harvest faradaic currents under reduced overpotentials. To protect the absorber from the harsh reaction conditions, a protective buffer layer (e. g. TiO₂) is added between absorber and catalyst. In this work, we investigate the influence of the catalyst support systems Ti/TiOₓ and Ti/TiOₓ/M (M=Au, Ni, Fe) on the overall activity and stability of nickel and iron mixed layered double hydroxides for the alkaline oxygen evolution reaction (OER). The catalyst performance on the bare Ti/TiOₓ substrate is very poor, but the incorporation of a metallic interlayer leads to two orders of magnitude higher OER current densities. While a similar effect has been observed for M=gold supported systems, we show that the same effect can be achieved with M=nickel/iron, already contained in the catalyst. This proprietary metal interlayer promises a cheap OER performance increase for PEC cells protected with titania buffer layers. Detailed XPS show an improved transformation of the starting catalyst material into the highly active (oxy)hydroxide phase, when using metallic interlayers. From these experiments a pure conductivity enhancement was excluded as possible explanation, but instead an additional change in the local atomic and electronic structure at the metal‐support and metal‐catalyst interfaces is proposed. |
| Freie Schlagworte: | electrocatalysis, nickel iron layered double hydroxide, oxygen evolution reaction, photoelectrochemistry, X-ray photoelectron spectroscopy |
| ID-Nummer: | e202201670 |
| Status: | Verlagsversion |
| URN: | urn:nbn:de:tuda-tuprints-242920 |
| Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 540 Chemie |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Fachgruppe Katalysatoren und Elektrokatalysatoren 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Oberflächenforschung 07 Fachbereich Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie 07 Fachbereich Chemie > Eduard Zintl-Institut |
| Hinterlegungsdatum: | 07 Aug 2023 08:21 |
| Letzte Änderung: | 02 Aug 2024 12:54 |
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- Effect of Metal Layer Support Structures on the Catalytic Activity of NiFe(oxy)hydroxide (LDH) for the OER in Alkaline Media. (deposited 07 Aug 2023 08:21) [Gegenwärtig angezeigt]
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