Obstructed Surface States as the Descriptor for Predicting Catalytic Active Sites in Inorganic Crystalline Materials

Guowei Li, Yuanfeng Xu, Zhida Song, Qun Yang, Yudi Zhang, Jian Liu, Uttam Gupta, Süβ Vicky, Yan Sun, Paolo Sessi, Stuart S.P. Parkin, B. Andrei Bernevig, Claudia Felser

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The discovery of new catalysts that are efficient and sustainable is a major research endeavor for many industrial chemical processes. This requires an understanding and determination of the catalytic origins, which remains a challenge. Here, a novel method to identify the position of active sites based on searching for crystalline symmetry-protected obstructed atomic insulators (OAIs) that have metallic surface states is described. The obstructed Wannier charge centers (OWCCs) in OAIs are pinned by symmetries at some empty Wyckoff positions so that surfaces that accommodate these sites are guaranteed to have metallic obstructed surface states (OSSs). It is proposed and confirmed that the OSSs are the catalytic activity origins for crystalline materials. The theory on 2H-MoTe2, 1T′-MoTe2, and NiPS3 bulk single crystals is verified, whose active sites are consistent with the calculations. Most importantly, several high-efficiency catalysts are successfully identified just by considering the number of OWCCs and the symmetry. Using the real-space-invariant theory applied to a database of 34 013 topologically trivial insulators, 1788 unique OAIs are identified, of which 465 are potential high-performance catalysts. The new methodology will facilitate and accelerate the discovery of new catalysts for a wide range of heterogeneous redox reactions.

Original languageEnglish (US)
Article number2201328
JournalAdvanced Materials
Volume34
Issue number26
DOIs
StatePublished - Jul 1 2022

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • Wannier charge centers
  • active sites
  • catalytic origins
  • hydrogen evolution
  • obstructed surface states

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