초록 열기/닫기 버튼
A straightforward strategy to resolve the H2S problem is its neutralization in alkaline media, followed byelectrolysis of the obtained solution upon suitable electrodes. Herein, we report for the first time that viagalvanostatic electrolysis of the resulting alkaline sulfide medium over copper electrodes, this harmfulpollutant could be safely as well as cost-effectively transformed to hydrogen clean fuel and a valueaddedeco-friendly semiconducting material. The strong interaction of copper with bisulfide (the dominantspecies of the medium at pH 11) resulted in a significant decrease in the system impedance, accompaniedby less electricity consumption during the process. A nano/micro-structured, mesoporousmorphology was observed for the anodic product (surface area: 11.4m2/g). Photoelectrochemical and diffusereflectance as well as XRD, EDX, XPS and photoluminescence investigations revealed that the materialsynthesized upon the anode surface was a narrow bandgap (Eg ¼ 1:63eV) p-type semiconductor. Inaddition to the economic perspective of the proposed electrolysis process (3 6 USD/kgH2), the underlyingmechanism of simultaneous production of semiconductor (CuS) and H2 was thoroughly discussed.
