Carbon quantum dots modified MoS2 with visible-light-induced high hydrogen evolution catalytic ability. (April 2016)

• Record Type: Journal Article
• Authors: Zhao, Shunyan; Li, Chuanxi; Wang, Liping; Liu, Naiyun; Qiao, Shi; Liu, Beibei; Huang, Hui; Liu, Yang; Kang, Zhenhui
• Is Part Of: Carbon. Volume 99(2016)
• Page Start: 599
• Page End: 606
• Publication Date: 2016-04
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.12.088
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: We developed a facile hydrothermal method to fabricate the carbon quantum dots (CQDs)/MoS2 composite as hydrogen evolution reduction (HER) catalyst. After irradiation with visible light for 30 min, the CQDs/MoS2 composite (as CQDs/MoS2 -L30) performed improved HER activity, featured by a small overpotential of ∼0.125 V at 10 mA cm −2, a high current density, a small Tafel slope of 45 mV/decade and a long term stability in 0.5 M H2 SO4 . This kind of activity improvement towards HER may be due to the high charge transfer efficiency, the decrease of S 4+ and the increase of S 2 2 − and S 2− after the light treatment.