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Facile and Green Synthesis of Well‐Defined Nanocrystal Oxygen Evolution Catalysts by Rational Crystallization Regulation

Titelangaben

Jiang, Wulyu ; Xia, Lu ; Ferreira Gomes Lobo, Bruna ; Haumann, Michael ; Dau, Holger ; Roth, Christina ; Lehnert, Werner ; Shviro, Meital:
Facile and Green Synthesis of Well‐Defined Nanocrystal Oxygen Evolution Catalysts by Rational Crystallization Regulation.
In: Small. Bd. 20 (2024) Heft 21 . - 2308594.
ISSN 1613-6829
DOI: https://doi.org/10.1002/smll.202308594

Volltext

Link zum Volltext (externe URL): Volltext

Angaben zu Projekten

Projekttitel:
Offizieller Projekttitel
Projekt-ID
Verbundprojekt LiveXAS: Live-Verfolgung von elektrisch-und photonen-getriebener Katalyse durch vielseitige energie-und zeitaufgelöste Röntgenabsorptions-Spektroskopie (XANES & EXAFS) in aktiv kontrollierten Probenumgebungen (Teilprojekt 2)
05K22W1

Projektfinanzierung: Bundesministerium für Bildung und Forschung

Abstract

The development of catalysts for an economical and efficient oxygen evolution reaction (OER) is critical for clean and sustainable energy storage and conversion. Nickel–iron-based (NiFe) nanostructures are widely investigated as active OER catalysts and especially shape-controlled nanocrystals exhibit optimized surface structure and electronic properties. However, the structural control from amorphous to well-defined crystals is usually time-consuming and requires multiple stages. Here, a universal two-step precipitation-hydrothermal approach is reported to prepare a series of NiFe-based nanocrystals (e.g., hydroxides, sulfides, and molybdates) from amorphous precipitates. Their morphology and evolution of atomic and electronic structure during this process are studied using conclusive microscopy and spectroscopy techniques. The short-term, additive-free, and low-cost method allows for the control of the crystallinity of the materials and facilitates the generation of nanosheets, nanorods, or nano-octahedra with excellent water oxidation activity. The NiFe-based crystalline catalysts exhibit slightly compromised initial activity but more robust long-term stability than their amorphous counterparts during electrochemical operation. This facile, reliable, and universal synthesis method is promising in strategies for fabricating NiFe-based nanostructures as efficient and economically valuable OER electrocatalysts.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: crystallization; electrocatalysts; nickel-iron; oxygen evolution reaction; X-ray absorption spectra
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik > Lehrstuhl Werkstoffverfahrenstechnik - Univ.-Prof. Dr. Christina Roth
Fakultäten
Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Werkstoffverfahrenstechnik
Titel an der UBT entstanden: Nein
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 19 Mär 2024 12:41
Letzte Änderung: 17 Jun 2024 11:47
URI: https://eref.uni-bayreuth.de/id/eprint/88933