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), pp. 12480-12484. Wiley-VCH, ISSN 09476539,
DOI: 10.1002/chem.201802684,
[Article]
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. |
| 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 of the journal: | 24 |
| Issue Number: | 48 |
| Publisher: | Wiley-VCH |
| 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 > 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 > Fachgebiet Anorganische Chemie |
| Date Deposited: | 16 Jul 2018 05:32 |
| DOI: | 10.1002/chem.201802684 |
| 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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