Surface states in bulk single crystal of topological semimetal Co${}_3$Sn${}_2$S${}_2$ towards water oxidation

Abstract

The band inversion in topological phase matters bring exotic physical properties such as the emergence of a topologically protected surface states. They strongly influence the surface electronic structures of the investigated materials and could serve as a good platform to gain insight into the catalytic mechanism of surface reactions. Here we synthesized high-quality bulk single crystals of the topological semimetal Co${}_3$Sn${}_2$S${}_2$. We found that at room temperature, Co${}_3$Sn${}_2$S${}_2$ naturally hosts the band structure of a topological semimetal. This guarantees the existence of robust surface states from the Co atoms. Bulk single crystal of Co${}_3$Sn${}_2$S${}_2$ exposes 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 $e_g$ 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 topological non-trivial surface states for the rational design of high-activity electrocatalysts.

arXiv comment16 pages, 4 figures

References in corpus (10)

• Wannier90: A Tool for Obtaining Maximally-Localised Wannier Functions
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Discovery of Weyl fermion semimetals and topological Fermi arc states
• Chemical Principles of Topological Semimetals
• Topological surface Fermi arcs in the magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• CO Oxidation Facilitated by Robust Surface States on Au-Covered Topological Insulators
• Topological nodal line states and a potential catalyst of hydrogen evolution in the TiSi family
• Extremely large magnetoresistance and Kohler's rule in PdSn4: a complete study of thermodynamic, transport and band structure properties
• Exploration and prediction of topological electronic materials based on first-principles calculations
• Low-field anomalous magnetic phase in the kagome-lattice shandite Co3Sn2S2

Cited by in corpus (20)

• Progress and prospects in magnetic topological materials
• Topological quantum materials from the viewpoint of chemistry
• Topological quantum catalyst: the case of two-dimensional traversing nodal line states associated with high catalytic performance for hydrogen evolution reaction
• Theoretical realization of hybrid Weyl state and associated high catalytic performance for hydrogen evolution in NiSi
• Excellent catalytic performance towards the hydrogen evolution reaction in topological semimetals
• On the anisotropies of magnetization and electronic transport of magnetic Weyl semimetal Co3Sn2S2
• Signatures of Weyl fermion annihilation in a correlated kagome magnet
• Electronic structure and topology across $T_c$ in magnetic Weyl semimetal Co${}_3$Sn${}_2$S${}_2$
• Intrinsic Magnetic Topological Materials
• Topological Phase Transition in a Magnetic Weyl Semimetal
• Topological Quasi-2D Semimetal Co${}_3$Sn${}_2$S${}_2$: Insights To Electronic Structure From NEXAFS and Resonant Photoelectron Spectroscopy
• Kagome metals
• Two-dimensionality of metallic surface conduction in Co3Sn2S2 thin films
• Correlation driven near-flat band Stoner excitations in a Kagome magnet
• Topological transitions by magnetization rotation in kagome monolayers of ferromagnetic Weyl semimetal Co-based shandite
• Broken symmetry and competing orders in Weyl semimetal interfaces
• Dipolar optical plasmon in thin-film Weyl semimetals
• Magnetic, transport and topological properties of Co-based shandite thin films
• Topological advantage for adsorbate chemisorption on conjugated chains
• Mesoscale variations of chemical and electronic landscape on the surface of Weyl semimetal Co${}_3$Sn${}_2$S${}_2$ visualized by ARPES and XPS