Aggregation‐Induced Improvement of Catalytic Activity by Inner‐Aggregate Electronic Communication of Metal‐Fullerene‐Based Surfactants

Kunkel, Marius; Bitter, Stefan; Sailer, Frank; Winter, Rainer F.; Polarz, Sebastian

Aggregation‐Induced Improvement of Catalytic Activity by Inner‐Aggregate Electronic Communication of Metal‐Fullerene‐Based Surfactants

Dateien

Kunkel_2-1a0fh78yrdofz5.pdfGröße: 870.67 KBDownloads: 322

Datum

2020

Angaben zur Forschungsförderung

European Union (EU): 614606

Projekt

I-SURF : Inorganic surfactants with multifunctinal heads

Open Access-Veröffentlichung

Open Access Hybrid

Sammlungen

Chemie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

ChemCatChem. Wiley. 2020, 12(10), pp. 2726-2731. ISSN 1867-3880. eISSN 1867-3899. Available under: doi: 10.1002/cctc.202000412

Zusammenfassung

A paradigm for active constituents in (homogeneous) catalysis is that optimum performance requires maximum dispersion. Generally, aggregation results in a decline. This is a different case in supramolecular catalysis. A new concept based on surfactants equipped with functional heads is presented, which becomes a more active catalyst itself upon aggregation. The head group of the surfactants is composed of a diethylenetriamine‐functionalized fullerene capable of coordinating to catalytically active metals like Co II . The improvement of catalytic properties upon aggregation is demonstrated via electrocatalytic water‐splitting reaction as a model system. Detailed electrochemistry studies were performed at concentrations below and above the critical aggregation concentration (cac). While isolated surfactant molecules represent only moderately active catalysts, drastic improvement of efficiency in the hydrogen evolution (HER) as well as in the oxygen evolution reactions (OER) were detected, once vesicular structures have formed. Self‐organization of the surfactants leads to an increase in turnover frequencies of up to 1300% (HER). The strongly beneficial effect of aggregation arises from the favorable alignment of individual molecules, thus, facilitating intermolecular charge transfer processes in the vesicles.

Fachgebiet (DDC)

540 Chemie

Schlagwörter

fullerene, surfactant, self-assembly, catalysis, water splitting

Zitieren

ISO 690

KUNKEL, Marius, Stefan BITTER, Frank SAILER, Rainer F. WINTER, Sebastian POLARZ, 2020. Aggregation‐Induced Improvement of Catalytic Activity by Inner‐Aggregate Electronic Communication of Metal‐Fullerene‐Based Surfactants. In: ChemCatChem. Wiley. 2020, 12(10), pp. 2726-2731. ISSN 1867-3880. eISSN 1867-3899. Available under: doi: 10.1002/cctc.202000412

BibTex

@article{Kunkel2020-05-20Aggre-49141,
  year={2020},
  doi={10.1002/cctc.202000412},
  title={Aggregation‐Induced Improvement of Catalytic Activity by Inner‐Aggregate Electronic Communication of Metal‐Fullerene‐Based Surfactants},
  number={10},
  volume={12},
  issn={1867-3880},
  journal={ChemCatChem},
  pages={2726--2731},
  author={Kunkel, Marius and Bitter, Stefan and Sailer, Frank and Winter, Rainer F. and Polarz, Sebastian}
}

RDF

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Universitätsbibliographie

Ja

Begutachtet

Ja