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  Tunable eg Orbital Occupancy in Heusler Compounds for Oxygen Evolution Reaction

Yu, M., Li, G., Fu, C., Liu, E., Manna, K., Budiyanto, E., et al. (2021). Tunable eg Orbital Occupancy in Heusler Compounds for Oxygen Evolution Reaction. Angewandte Chemie International Edition, 60(11), 5800-5805. doi:10.1002/anie.202013610.

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 Creators:
Yu, Mingquan1, Author              
Li, Guowei2, Author              
Fu, Chenguang2, Author              
Liu, Enke2, 3, Author              
Manna, Kaustuv2, 4, Author              
Budiyanto, Eko1, Author              
Yang, Qun2, Author              
Felser, Claudia2, Author
Tüysüz, Harun1, Author              
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863425              
3Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190 P. R. China, ou_persistent22              
4Department of Physics, Indian Institute of Technology, Delhi, New Delhi, 110016 India, ou_persistent22              

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Free keywords: cobalt; heterogeneous catalysis; Heusler compounds; oxygen evolution reaction; water electrolysis
 Abstract: Heusler compounds have potential in electrocatalysis because of their mechanical robustness, metallic conductivity, and wide tunability in the electronic structure and element compositions. This study reports the first application of Co2YZ‐type Heusler compounds as electrocatalysts for the oxygen evolution reaction (OER). A range of Co2YZ crystals was synthesized through the arc‐melting method and the eg orbital filling of Co was precisely regulated by varying Y and Z sites of the compound. A correlation between the eg orbital filling of reactive Co sites and OER activity was found for Co2MnZ compounds (Z=Ti, Al, V, and Ga), whereby higher catalytic current was achieved for eg orbital filling approaching unity. A similar trend of eg orbital filling on the reactivity of cobalt sites was also observed for other Heusler compounds (Co2VZ, Z=Sn and Ga). This work demonstrates proof of concept in the application of Heusler compounds as a new class of OER electrocatalysts, and the influence of the manipulation of the spin orbitals on their catalytic performance.

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Language(s): eng - English
 Dates: 2020-10-092020-12-102021-03-08
 Publication Status: Published in print
 Pages: 6
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/anie.202013610
 Degree: -

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Title: Angewandte Chemie International Edition
  Abbreviation : Angew. Chem., Int. Ed.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 60 (11) Sequence Number: - Start / End Page: 5800 - 5805 Identifier: ISSN: 1433-7851
CoNE: https://pure.mpg.de/cone/journals/resource/1433-7851