Porous Tantalum Nitride Single Crystal at Two Centimeter Scale with Enhanced Photoelectrochemical Performance.

Author(s) Xie, K.; Jin, L.; Cheng, F.; Li, H.
Journal Angew Chem Int Ed Engl
Date Published 2020 Mar 04

Porous tantalum nitride (Ta3N5) single crystals, combining structural coherence and porous microstructure, would substantially improve the photoelectrochemical performance. The structural coherence would reduce the recombination of charge carriers and maintain excellent transport property while the porous microstructure would not only reduce photon scattering and but also facilitate surface reactions. Here we grow bulk-porous Ta 3 N 5 single crystals on an two centimeter scale with (002) , (023) and (041) facets, respectively, and show significantly enhanced photoelectrochemical performances. We show the preferential facet growth of porous crystals in a lattice reconstruction strategy in relation to lattice match and lattice channel. We present the facet engineering to enhance light absorption, exciton lifetime and transport properties. The porous Ta 3 N 5 single crystal boosts photoelectrochemical oxidation of alcohol with the (002) facet showing the highest performance of >99% alcohol conversion and >99% aldehyde/ketone selectivity.

DOI 10.1002/anie.202001204
ISSN 1521-3773
Citation Angew Chem Int Ed Engl. 2020.

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