Akademik Veri Yönetim Sistemi
Inorganic Chemistry Communications, cilt.188, 2026 (SCI-Expanded, Scopus)
To enhance photocatalytic performances of cobalt oxide (Co3O4) particles, Co3O4 was decorated with sulfur (x = 0.5, 1, 1.5 and 2) to produce cobalt oxysulfide (Co3O4-xSx) which were synthesized by hydrothermal synthesis method. The photocatalysts were characterized by different spectroscopic and microscopic techniques. The performances of the prepared photocatalysts were evaluated for hydrogen evolution reaction (HER) in an electrolyte bearing Na2S/Na2SO3 sacrificial reagent. The photocatalytic tests indicated that the photocatalytic H2 production rates of Co3O3.5S0.5, Co3O4, Co3O3S1, Co3O2.5S1.5 and Co3O2S2 structures were reported as 3705 μmol/gcat.h, 3228 μmol/gcat.h, 2815 μmol/gcat.h, 2513 μmol/gcat.h and 1375 μmol/gcat.h respectively. Additionally, the highest solar to hydrogen (STH) efficiency (% 4.59) was also obtained with Co3O3.5S0.5. The HER performance of Co3O4 enhanced with changing the structure to oxysulfide of Co3O3.5S0.5 structure due to tuned band gap, improved charge separation, increased light absorption, creating more active sites, and conserving high stability as a result of the partial sulfur substitution. This study also illuminated that increasing sulfur amount more than 0.5 in the Co3O4-xSx structure caused excessive electron-hole recombination and the formation of instable materials.