Photochemical Water Splitting by Bismuth Chalcogenide Topological Insulators

Catherine R. Rajamathi, Uttam Gupta, Koushik Pal, Nitesh Kumar, Hao Yang, Yan Sun, Chandra Shekhar, Binghai Yan, Stuart Parkin, Umesh V. Waghmare, Claudia Felser, C. N.R. Rao

Research output: Contribution to journalArticlepeer-review

63 Scopus citations

Abstract

As one of the major areas of interest in catalysis revolves around 2D materials based on molybdenum sulfide, we have examined the catalytic properties of bismuth selenides and tellurides, which are among the first chalcogenides to be proven as topological insulators (TIs). We find significant photochemical H2 evolution activity with these TIs as catalysts. H2 evolution increases drastically in nanosheets of Bi2Te3 compared to single crystals. First-principles calculations show that due to the topology, surface states participate and promote the hydrogen evolution.

Original languageEnglish (US)
Pages (from-to)2322-2327
Number of pages6
JournalChemPhysChem
Volume18
Issue number17
DOIs
StatePublished - Sep 6 2017

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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