Emergence of Visible-Light Water Oxidation Upon Hexaniobate-Ligand Entrapment of Quantum-Confined Copper-Oxide Cores

Chandan Kumar Tiwari, Shubasis Roy, Tal Tubul-Sterin, Mark Baranov, Nitai Leffler, Mu Li, Panchao Yin, Alevtina Neyman, Ira A. Weinstock

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The formation of small 1 to 3 nm organic-ligand free metal-oxide nanocrystals (NCs) is essential to utilization of their attractive size-dependent properties in electronic devices and catalysis. We now report that hexaniobate cluster-anions, [Nb6O19]8−, can arrest the growth of metal-oxide NCs and stabilize them as water-soluble complexes. This is exemplified by formation of hexaniobate-complexed 2.4-nm monoclinic-phase CuO NCs (1), whose ca. 350 Cu-atom cores feature quantum-confinement effects that impart an unprecedented ability to catalyze visible-light water oxidation with no added photosensitizers or applied potentials, and at rates exceeding those of hematite NCs. The findings point to polyoxoniobate-ligand entrapment as a potentially general method for harnessing the size-dependent properties of very small semiconductor NCs as the cores of versatile, entirely-inorganic complexes.

Original languageEnglish
Article numbere202213762
JournalAngewandte Chemie - International Edition
Volume62
Issue number10
DOIs
StatePublished - 1 Mar 2023

Keywords

  • Copper Oxide
  • Hexaniobate Anion
  • Photocatalysis
  • Water Oxidation

ASJC Scopus subject areas

  • General Chemistry
  • Catalysis

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