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Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction

Shahraei, Ali ; Martinaiou, Ioanna ; Creutz, Kim Alexander ; Kuebler, Markus ; Weidler, Natascha ; Ranecky, Simon Theophil ; Wallace, William David Zacharias ; Nowroozi, Mohammad Ali ; Clemens, Oliver ; Stark, Robert W. ; Kramm, Ulrike :
Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction.
[Online-Edition: https://doi.org/10.1002/chem.201802684]
In: Chemistry - A European Journal, 24 (48) S. 12480-12484. ISSN 09476539
[Artikel] , (2018)

Offizielle URL: https://doi.org/10.1002/chem.201802684

Kurzbeschreibung (Abstract)

Today, metal–N‐ as well as metal–S‐doped carbon materials are known to catalyze the hydrogen evolution reaction (HER). However, especially N‐ and S‐co‐doped catalysts reach highest activity, but it remains unclear if the activity is related to MNx or MSy (M=metal) sites. In this work we apply a simple method for multi‐heteroatom doping and investigate the effect of cobalt content on the HER in acidic medium. The CoNx and CoSy sites were evidenced on the basis of structural characterization by Raman, X‐ray induced photoelectron spectroscopy, and TEM. The presence of sulfur enables the formation of a larger number of CoNx sites. Structure–performance relationship proves that the HER activity is dominated by CoNx rather than CoSy sites. The most active catalysts also exhibit an excellent stability under galvanostatic conditions making them of interest for electrolyser application.

Typ des Eintrags: Artikel
Erschienen: 2018
Autor(en): Shahraei, Ali ; Martinaiou, Ioanna ; Creutz, Kim Alexander ; Kuebler, Markus ; Weidler, Natascha ; Ranecky, Simon Theophil ; Wallace, William David Zacharias ; Nowroozi, Mohammad Ali ; Clemens, Oliver ; Stark, Robert W. ; Kramm, Ulrike
Titel: Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction
Sprache: Englisch
Kurzbeschreibung (Abstract):

Today, metal–N‐ as well as metal–S‐doped carbon materials are known to catalyze the hydrogen evolution reaction (HER). However, especially N‐ and S‐co‐doped catalysts reach highest activity, but it remains unclear if the activity is related to MNx or MSy (M=metal) sites. In this work we apply a simple method for multi‐heteroatom doping and investigate the effect of cobalt content on the HER in acidic medium. The CoNx and CoSy sites were evidenced on the basis of structural characterization by Raman, X‐ray induced photoelectron spectroscopy, and TEM. The presence of sulfur enables the formation of a larger number of CoNx sites. Structure–performance relationship proves that the HER activity is dominated by CoNx rather than CoSy sites. The most active catalysts also exhibit an excellent stability under galvanostatic conditions making them of interest for electrolyser application.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Chemistry - A European Journal
Band: 24
(Heft-)Nummer: 48
Verlag: Wiley VCH, Weinheim, Germany
Freie Schlagworte: carbon, cobalt, energy conversion, heterogeneous catalysis, hydrogen evolution reaction, non-precious metal catalysts
Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgruppe Katalysatoren und Elektrokatalysatoren
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Materialdesign durch Synthese
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Physics of Surfaces
Hinterlegungsdatum: 16 Jul 2018 05:32
DOI: 10.1002/chem.201802684
Offizielle URL: https://doi.org/10.1002/chem.201802684
Sponsoren: Financial support by the graduate school of excellence energy science and engineering (GSC1070) the BMBF young research group (03XP0092) and by the DFG project (KR 3980/4‐1) is acknowledged by U.I.K., A.S., I.M., N.W., M.K., and W.D.Z.W.
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