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

Autor:	Kumar Tiwari, Chandan, Roy, Shubasis, Tubul‐Sterin, Tal, Baranov, Mark, Leffler, Nitai, Li, Mu, Yin, Panchao, Neyman, Alevtina, Weinstock, Ira A.
Předmět:	OXIDATION of water COPPER oxide ELECTRONIC equipment HEMATITE NANOCRYSTALS
Zdroj:	Angewandte Chemie; Mar2023, Vol. 135 Issue 10, p1-7, 7p
Abstrakt:	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. [ABSTRACT FROM AUTHOR]
Databáze:	Complementary Index
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