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

Shahraei, Ali and Martinaiou, Ioanna and Creutz, Kim Alexander and Kuebler, Markus and Weidler, Natascha and Ranecky, Simon Theophil and Wallace, William David Zacharias and Nowroozi, Mohammad Ali and Clemens, Oliver and Stark, Robert W. and 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) pp. 12480-12484. ISSN 09476539
[Article] , (2018)

Official URL: https://doi.org/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.

Item Type: Article
Erschienen: 2018
Creators: Shahraei, Ali and Martinaiou, Ioanna and Creutz, Kim Alexander and Kuebler, Markus and Weidler, Natascha and Ranecky, Simon Theophil and Wallace, William David Zacharias and Nowroozi, Mohammad Ali and Clemens, Oliver and Stark, Robert W. and Kramm, Ulrike
Title: Exploring Active Sites in Multi-heteroatom Doped Co-based Catalysts for Hydrogen Evolution Reaction
Language: English
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.

Journal or Publication Title: Chemistry - A European Journal
Volume: 24
Number: 48
Publisher: Wiley VCH, Weinheim, Germany
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
11 Department of Materials and Earth Sciences > Material Science > 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
Date Deposited: 16 Jul 2018 05:32
DOI: 10.1002/chem.201802684
Official URL: https://doi.org/10.1002/chem.201802684
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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