期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 283, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119601
关键词
Photocatalyst; Water dissociation; Hole transfer; Hydrogen generation; Alkaline solution
资金
- National Natural Science Foundation of China [21590813]
- Department of Science and Technology of Dalian [2018J11CY012]
- Liaoning Revitalization Talents Program [XLYC1801003]
- Program of Introducing Talents of Discipline to Universities [B13012]
- Fundamental Research Funds for the Central Universities [DUT19TD27]
Metal sulfide photocatalysts are at the forefront of hydrogen evolution reaction (HER) and solar energy conversion due to their suitable electronic and optical properties. However, the efficiency of these photocatalysts is often limited by slow transfer of photogenerated holes and sluggish water dissociation kinetics. A new Pt-CrOx/ZnCdS photocatalyst has been proposed to improve HER efficiency by utilizing a redox couple transport mechanism, leading to enhanced hydrogen production and phenol degradation in alkaline media.
Metal sulfide photocatalysts have been leading edge for hydrogen evolution reaction (HER) and solar energy conversion due to their suitable electronic and optical properties. The efficiency of these photocatalysts is mostly restricted by slow transfer of photogenerated holes and sluggish water dissociation kinetics. Here, we proposed HER catalyst comprising of Pt-CrOx sites loaded on ZnCdS nanocrystal (ZnCdS/Pt-CrOx) that employing a redox couple (%OH/OH-) transport mechanism to efficiently relay of holes in alkaline media. The Pt sites provide optimal hydrogen adsorption energy and CrOx sites support water dissociation, which speed up water dissociation kinetics and leads to a noticeable enhance in HER (21.1 mmol g(-1) h(-1)) and phenol degradation. Such efficient activity could be associated to a better mobility of redox couple and fast water dissociation kinetics in alkaline solution. These types of related works open pathways to generate hydrogen from the sea water, largest water source on earth.
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