TY  - JOUR
AU  - Lee, Minoh
AU  - Ding, Xinyu
AU  - BANERJEE, SWARNENDU
AU  - Krause, Florian
AU  - Smirnov, Vladimir
AU  - Astakhov, Oleksandr
AU  - Merdzhanova, Tsvetelina
AU  - Klingebiel, Benjamin
AU  - Kirchartz, Thomas
AU  - Finger, Friedhelm
AU  - Rau, Uwe
AU  - Haas, Stefan
TI  - Bifunctional CoFeVO$_x$ Catalyst for Solar Water Splitting by using Multijunction and Heterojunction Silicon Solar Cells
JO  - Advanced materials technologies
VL  - 5
IS  - 12
SN  - 2365-709X
CY  - Weinheim
PB  - Wiley
M1  - FZJ-2020-03187
SP  - 2000592
PY  - 2020
AB  - Photovoltaic driven electrochemical (PV-EC) water splitting technology is considered as one of the solutions for an environmental-friendly hydrogen supply. In a PV-EC system, efficient catalysts are required to increase the rate of both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER). Here, we present the development of a CoFeVO$_x$ bifunctional catalyst produced by a simple electrodeposition method. We have found that after the water splitting reaction vanadium is almost completely depleted in the mixture of elements for OER while its concentration at the HER catalyst is similar or even higher after the reaction. For the OER catalyst the depletion of vanadium might lead to the formation of pores, which could be correlated with the activity enhancement. The developed catalyst is integrated into PV-EC devices, coupled with different types of silicon PV. An average solar to hydrogen efficiency of 13.3 % (9.6 cm$^2$ PV aperture area) is achieved with a shingled module consisting of three laterally series connected silicon heterojunction solar cells.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000588665700001
DO  - DOI:10.1002/admt.202000592
UR  - https://juser.fz-juelich.de/record/884301
ER  -