Electrodeposited WO3/Au photoanodes for photoelectrochemical reactions
This work aims to study the effect of gold (Au) loading on the photoelectrochemical behavior of tungsten trioxide (WO3 ) photoelectrodes. The WO3 film has been fabricated via electrodeposition method with constant potential on fluorine doped tin oxide (FTO) glass substrate. The Au nanoparticle...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Penerbit Universiti Kebangsaan Malaysia
2020
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| Online Access: | http://journalarticle.ukm.my/16186/ http://journalarticle.ukm.my/16186/1/32.pdf |
| Summary: | This work aims to study the effect of gold (Au) loading on the photoelectrochemical behavior of tungsten trioxide
(WO3
) photoelectrodes. The WO3
film has been fabricated via electrodeposition method with constant potential on
fluorine doped tin oxide (FTO) glass substrate. The Au nanoparticle loading on WO3
films surface was also prepared by
constant potential electrodeposition. Due to the small amount of Au loading, the band gap values of the plasmonized
WO3
remained around 2.6 eV. However, during the photoelectrochemical analysis, the photoactivity of the plasmonized
WO3
photoelectrodes improved >100% with a minimal amount of Au loading compared to the pristine WO3
. The
photocurrent generation was further enhanced with the presence of organic donors (methanol and formic acid). The
photocurrent achieved 3.74 mA/cm2
when 1.0 M of formic acid was added. Plausible charge transfer mechanism was
suggested. |
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