Title of article :
Photocatalytic hydrogen production in a noble-metal-free system catalyzed by in situ grown molybdenum sulfide catalyst
Author/Authors :
Xu Zong، نويسنده , , Zheng Xing، نويسنده , , Hua Yu، نويسنده , , Yang Bai، نويسنده , , Gao Qing (Max) Lu، نويسنده , , Lianzhou Wang and Jingkun Guo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Abstract :
The establishment of cost-effective photocatalytic system based on earth-abundant materials is crucial for the practical utilizations of solar energy. To achieve this goal, it is highly desirable to employ photosensitizers and catalysts that are both derived from earth-abundant materials. Herein, we report an efficient noble-metal-free system by integrating the above two components. We found that functional MoSx nanoparticles can be obtained with an in situ photoreduction manner during photocatalytic reactions in the presence of inexpensive organic sensitizers. The thus-obtained MoSx catalysts demonstrated quite high efficiency for catalyzing H2 evolution under visible light. The factors influencing the performance of the photocatalytic system was investigated and a two-step reaction mechanism was proposed. The concept of in situ formation of hydrogen evolution catalyst paves the way for investigating biomimetic molybdenum sulfide catalysts for photocatalytic H2 production in systems without the presence of noble metals.
Keywords :
photocatalyst , Overall splitting of H2O , Co-catalyst , gallium oxide , Precipitation method
Journal title :
Journal of Catalysis
Journal title :
Journal of Catalysis