Hematite photoelectrodes grown on porous CuO–Sb2O5–SnO2 ceramics for photoelectrochemical water splitting
نویسندگان
چکیده
Abstract Photoelectrodes capable of cost-effective hydrogen production on a large scale, via photoelectrochemical water splitting under solar light, could offer an elegant solution to many current problems humankind caused by over-reliance fossil fuels and the resulting environmental pollution. The search design low-cost photoelectrode materials substrates for practical applications are required. In this work, unmodified hematite photoanodes grown metal-organic chemical vapor deposition (MO-CVD) onto CuO–Sb2O5–SnO2 ceramic reported. time precursor varied between 10 min, 60 min, 90 min. photoanode 60 min exhibits highest photocurrent density recorded at 1.23 V vs RHE (reversible electrode): 4.79 mA/cm2 blue light Thorlabs LED M455L2 (455 nm), 0.41 mA/cm2 radiation real sun in Mexico, 0.38 mA/cm2 AM1.5G simulator conditions. high porosity ceramics permits permeation into substrate bulk, which results 3D-growth thin Fe2O3-coating (50 nm or less) conductive SnO2-grains depth ca. 5 ?m. thick photocatalytic layer (SnO2-grains coated hematite) several micrometers assures good harvesting photoelectrode, while nano-sized Fe2O3-films is favorable charge diffusion. This architecture characteristics promising further development.
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ژورنال
عنوان ژورنال: Solar Energy Materials and Solar Cells
سال: 2021
ISSN: ['0927-0248', '1879-3398']
DOI: https://doi.org/10.1016/j.solmat.2020.110886