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  4. Achieving visible light-driven hydrogen evolution at positive bias with a hybrid copper-iron oxide|TiO2-cobaloxime photocathode
 
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research article

Achieving visible light-driven hydrogen evolution at positive bias with a hybrid copper-iron oxide|TiO2-cobaloxime photocathode

Tapia, C.
•
Bellet-Amalric, E.
•
Aldakov, D.
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May 21, 2020
Green Chemistry

H-2 is an environmentally-friendly fuel that would allow for a circular economy but its sustainable production, e.g. from solar energy and water, remains a challenge. A hybrid CuFexOy|TiO2-CoHEC (CoHEC = chloro([4,4 '-bipyridine]-2,6-dicarboxylic acid)bis(dimethylglyoximato)cobalt(iii)) photocathode for hydrogen evolution reaction (HER), with faradaic efficiencies of 54-88%, is described, the preparation of which uses only non-toxic and Earth-abundant elements, avoids etching treatments and limits the use of organic solvents. The semi-conducting CuFexOy light absorber is obtained by sol-gel synthesis followed by calcination at moderate temperature. Grafting the CoHEC cobaloxime catalyst at its surface results in H-2 evolution with an onset photocurrent potential of +860 mV; this process being stabilized by the presence of a thin layer of amorphous TiO2 deposited onto CuFexOy.

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Type
research article
DOI
10.1039/d0gc00979b
Web of Science ID

WOS:000537870500012

Author(s)
Tapia, C.
•
Bellet-Amalric, E.
•
Aldakov, D.
•
Boudoire, F.  
•
Sivula, K.  
•
Cagnon, L.
•
Artero, V
Date Issued

2020-05-21

Publisher

ROYAL SOC CHEMISTRY

Published in
Green Chemistry
Volume

22

Issue

10

Start page

3141

End page

3149

Subjects

Chemistry, Multidisciplinary

•

Green & Sustainable Science & Technology

•

Chemistry

•

Science & Technology - Other Topics

•

cufe2o4 nanoparticles

•

h-2 evolution

•

organic-dye

•

water

•

efficient

•

catalyst

•

si

•

performance

•

electrodes

•

cobaloxime

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LIMNO  
Available on Infoscience
June 20, 2020
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/169500
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