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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 I. (2018)
Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction.
In: Chemistry - A European Journal, 24 (48)
doi: 10.1002/chem.201802684
Article, Bibliographie

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.

Item Type: Article
Erschienen: 2018
Creators: 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 I.
Type of entry: Bibliographie
Title: Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction
Language: English
Date: 27 August 2018
Publisher: Wiley-VCH
Journal or Publication Title: Chemistry - A European Journal
Volume of the journal: 24
Issue Number: 48
DOI: 10.1002/chem.201802684
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.

Uncontrolled Keywords: Carbon, cobalt, energy conversion, heterogeneous catalysis, hydrogen evolution reaction, non-precious metal catalysts
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie > Catalysts and Electrocatalysts
11 Department of Materials and Earth Sciences > Material Science > Fachgebiet Materialdesign durch Synthese
11 Department of Materials and Earth Sciences > Material Science > Physics of Surfaces
07 Department of Chemistry
07 Department of Chemistry > Eduard Zintl-Institut > Fachgebiet Anorganische Chemie
Date Deposited: 16 Jul 2018 05:32
Last Modified: 18 Aug 2021 07:41
PPN:
Funders: 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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