Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance - Publication - MOST Wiedzy

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Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance

Abstract

In this work, thin layers of MoO3 were tested as potential photoanodes for water splitting. The influence of photointercalation of alkali metal cation (K+) into the MoO3 structure on the photoelectrochemical properties of the molybdenum trioxide films was investigated for the first time. MoO3 thin films were synthesized via thermal annealing of thin, metallic Mo films deposited onto the FTO substrate using a magnetron sputtering system. The Tauc and Mott–Schottky plots analysis were performed in order to determine the energy bands position of the investigated material. The photointercalation effect of K+ on photoelectrochemical properties of FTO/MoO3 photoanodes was studied using electrochemical techniques performed under simulated solar light illumination. It was proven that pristine MoO3 layers cannot act as effective photoanodes for water splitting due to the utilization of the photoexcited electrons in the intercalation process. The photochromic phenomenon related to Mo6+ centers reduction, and K+ intercalation occurs at a potential range in which the photoanode exhibits photoelectrochemical activity towards water photooxidation.

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Details

Category:
Articles
Type:
artykuły w czasopismach dostępnych w wersji elektronicznej [także online]
Published in:
Electrocatalysis pages 1 - 10,
ISSN: 1868-2529
Language:
English
Publication year:
2019
Bibliographic description:
Szkoda M., Trzciński K., Łapiński M. S., Lisowska-Oleksiak A., Photoinduced K+ Intercalation into MoO3/FTO Photoanode—the Impact on the Photoelectrochemical Performance, Electrocatalysis, 2019,10.1007/s12678-019-00561-2
DOI:
Digital Object Identifier (open in new tab) 10.1007/s12678-019-00561-2
Verified by:
Gdańsk University of Technology

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