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  Surface states in bulk single crystal of topological semimetal Co3Sn2S2 toward water oxidation

Li, G., Xu, Q., Shi, W., Fu, C., Jiao, L., Kamminga, M. E., et al. (2019). Surface states in bulk single crystal of topological semimetal Co3Sn2S2 toward water oxidation. Science Advances, 5(8): eaaw9867. doi:10.1126/sciadv.aaw9867.

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https://doi.org/10.1126/sciadv.aaw9867 (Publisher version)
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Li, Guowei1, Author
Xu, Qiunan1, Author
Shi, Wujun1, Author
Fu, Chenguang1, Author
Jiao, Lin1, Author
Kamminga, Machteld E1, Author
Yu, Mingquan1, Author
Tueysuez, Harun1, Author
Kumar, Nitesh1, Author
Süss, Vicky1, Author
Saha, Rana2, Author           
Srivastava, Abhay K.2, 3, Author           
Wirth, Steffen1, Author
Auffermann, Gudrun1, Author
Gooth, Johannes1, Author
Parkin, Stuart2, Author                 
Sun, Yan1, Author
Liu, Enke1, Author
Felser, Claudia1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Nano-Systems from Ions, Spins and Electrons, Max Planck Institute of Microstructure Physics, Max Planck Society, ou_3287476              
3International Max Planck Research School for Science and Technology of Nano-Systems, Max Planck Institute of Microstructure Physics, Max Planck Society, Weinberg 2, 06120 Halle (Saale), Germany, ou_3399928              

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 Abstract: The band inversion in topological phase matters bring exotic physical properties such as the topologically protected surface states (TSS). They strongly influence the surface electronic structures of the materials and could serve as a good platform to gain insight into the surface reactions. Here we synthesized high-quality bulk single crystals of Co3Sn2S2 that naturally hosts the band structure of a topological semimetal. This guarantees the existence of robust TSS from the Co atoms. Co3Sn2S2 crystals expose their Kagome lattice that constructed by Co atoms and have high electrical conductivity. They serves as catalytic centers for oxygen evolution process (OER), making bonding and electron transfer more efficient due to the partially filled orbital. The bulk single crystal exhibits outstanding OER catalytic performance, although the surface area is much smaller than that of Co-based nanostructured catalysts. Our findings emphasize the importance of tailoring TSS for the rational design of high-activity electrocatalysts.

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 Dates: 2019-08-162019-08-02
 Publication Status: Issued
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 Identifiers: BibTex Citekey: P13806
DOI: 10.1126/sciadv.aaw9867
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: - Volume / Issue: 5 (8) Sequence Number: eaaw9867 Start / End Page: - Identifier: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548