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

Li, Guowei; Xu, Qiunan; Shi, Wujun; Fu, Chenguang; Jiao, Lin; Kamminga, Machteld E.; Yu, Mingquan; Tüysüz, Harun; Kumar, Nitesh; Süß, Vicky; Saha, Rana; Srivastava, Abhay K.; Wirth, Steffen; Auffermann, Gudrun; Gooth, Johannes; Parkin, Stuart; Sun, Yan; Liu, Enke; Felser, Claudia

doi:10.1126/sciadv.aaw9867

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

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Li, Guowei
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons221626

Xu, Qiunan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons209329

Fu, Chenguang
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons182590

Jiao, Lin
Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons195511

Kumar, Nitesh
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons192597

Süß, Vicky
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126910

Wirth, Steffen
Steffen Wirth, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126525

Auffermann, Gudrun
Gudrun Auffermann, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons220347

Gooth, Johannes
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons179670

Sun, Yan
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser, Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

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, pp. 1-8. doi:10.1126/sciadv.aaw9867.

Cite as: https://hdl.handle.net/21.11116/0000-0004-8C97-4

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.