TY  - JOUR
AU  - Cibaka, Thérèse
AU  - Merdzhanova, Tsvetelina
AU  - Astakhov, Oleksandr
AU  - Shcherbachenko, Sergey
AU  - Liu, Guangxin
AU  - Pham, Chuyen van
AU  - Rau, Uwe
AU  - Strasser, Peter
TI  - Persistent CO 2 Reduction Performance of an Ag Nanoparticle Gas Diffusion Electrode in Realistic Dynamic PV-Driven Operation
JO  - Energy & fuels
VL  - 39
SN  - 0887-0624
CY  - Columbus, Ohio
PB  - American Chemical Society
M1  - FZJ-2025-03932
SP  - acs.energyfuels.5c03523
PY  - 2025
AB  - Progress in the development of CO2 reductioncatalysts has revealed more stable and selective options for solarfuel production. In most cases, the catalysts are tested under steady-state conditions. However, to become a reliable long-term storagesolution for renewable energy, particularly photovoltaics (PV), CO2electroreduction must tolerate power intermittency. Directcoupling of CO2 electrolyzers to PV devices enables carbonutilization and efficient energy storage but requires catalysts thatmaintain consistent performance under dynamic power input.Herein, we select an Ag nanoparticle gas diffusion cathode withstable CO production across a wide current density range. Thesystem, directly coupled to a hardware-emulated Si-PV moduleoperating under a realistic sunny day profile, achieves 96% energy coupling efficiency and reaches a cumulative solar-to-chemical(CO) efficiency of 8.8% in 1 day. This study demonstrates the potential of Ag-based cathodes for robust performance in variable PV-powered systems and introduces a novel test methodology that better reflects real-world PV-electrolyzer integration, therebyadvancing practical implementation of solar-driven CO2 reduction.
LB  - PUB:(DE-HGF)16
DO  - DOI:10.1021/acs.energyfuels.5c03523
UR  - https://juser.fz-juelich.de/record/1046720
ER  -