In:
ECS Meeting Abstracts, The Electrochemical Society, Vol. MA2020-02, No. 53 ( 2020-11-23), p. 3846-3846
Kurzfassung:
We report on the first fabrication of vertically oriented niobium-zirconium oxynitride nanotube arrays and their use as an attractive and robust material for visible-light-driven water oxidation. These nanotube arrays with an average diameter of ∼120 nm and very short length ∼90 nm were synthesized via one-step anodization of Nb-Zr alloy sheet in NH4F-containing electrolytes. Ammonolysis of the nanotubes resulted in narrowing the bandgap energy from 3.23 to ∼2.67 eV. The Nb-Zr oxynitride nanotube arrays showed approximately an enhancement of about 1900% over that reported for thin film electrodes made of niobium oxynitride and 3700% greater than that recorded for nitrogen-doped mesoporous Nb 2 O 5 . Mott-Schottky and the valence band XPS analyses revealed the favorable band positions of the fabricated oxynitride nanotubes with respect to the water redox potentials with very high charge carriers density. The photocurrent transient measurements revealed the remarkable stability of the fabricated oxynitride nanotubes.
Materialart:
Online-Ressource
ISSN:
2151-2043
DOI:
10.1149/MA2020-02533846mtgabs
Sprache:
Unbekannt
Verlag:
The Electrochemical Society
Publikationsdatum:
2020
ZDB Id:
2438749-6
