Solar Hydrogen Generation by Nanoscale p鈥搉 Junction of p-type Molybdenum Disulfide/n-type Nitrogen-Doped Reduced Graphene Oxide

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• 作者：Fanke Meng ; Jiangtian Li ; Scott K. Cushing ; Mingjia Zhi ; Nianqiang Wu
• 刊名：The Journal of the American Chemical Society
• 出版年：2013
• 出版时间：July 17, 2013
• 年：2013
• 卷：135
• 期：28
• 页码：10286-10289
• 全文大小：282K
• 年卷期：v.135,no.28(July 17, 2013)
• ISSN：1520-5126

文摘

Molybdenum disulfide (MoS₂) is a promising candidate for solar hydrogen generation but it alone has negligible photocatalytic activity. In this work, 5鈥?0 nm sized p-type MoS₂ nanoplatelets are deposited on the n-type nitrogen-doped reduced graphene oxide (n-rGO) nanosheets to form multiple nanoscale p鈥?i>n junctions in each rGO nanosheet. The p-MoS₂/n-rGO heterostructure shows significant photocatalytic activity toward the hydrogen evolution reaction (HER) in the wavelength range from the ultraviolet light through the near-infrared light. The photoelectrochemical measurement shows that the p-MoS₂/n-rGO junction greatly enhances the charge generation and suppresses the charge recombination, which is responsible for enhancement of solar hydrogen generation. The p-MoS₂/n-rGO is an earth-abundant and environmentally benign photocatalyst for solar hydrogen generation.