题目：

Mesoporous nitrogen, sulfur co-doped carbon dots/CoS hybrid as an efficient electrocatalyst for hydrogen evolution

作者：

Liping Wang, Xiuqin Wu, Sijie Guo, Mumei Han, Yunjie Zhou, Yue Sun, Hui Huang,* Yang Liu* and Zhenhui Kang

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, P. R. China.

摘要：

Hydrogen is an ideal energy carrier for renewable energy, but a high overpotential is required to achieve reasonable H₂ evolution, which makes the design of highly active electrocatalysts for hydrogen evolution reaction (HER) urgent. Here, we report a nitrogen, sulfur co-doped carbon dots (NSCDs)/CoS hybrid with a three-dimensional mesoporous sponge-like nanostructure, fabricated via heat-treatment, which as electrocatalyst exhibits the desired electrocatalytic activity for electrochemical HER. A series of NSCDs/ CoS hybrids with different contents of NSCDs were prepared by adjusting the concentration of NSCDs, of which the NSCDs/CoS hybrid with 20 mg L^-1 NSCDs exhibits the best electrocatalytic activity towards HER with an onset potential of 0.095 V, an overpotential at 10 mA cm^-2 of 165 mV, a small Tafel slope of 56 mV per decade, and a good stability in 0.5 M H₂SO₄. The excellent electrocatalytic activity of NSCDs/CoS for HER is attributed to synergetic effects of NSCDs and CoS, in which the NSCDs could protect the CoS from dissolution/agglomeration under acidic conditions, and the increased surface area of the NSCDs/CoS hybrid and the high charge transfer efficiency between NSCDs and CoS via Co�S�C bonding enhanced the HER performance.

影响因子：

8.262

分区情况：

1区

链接： 

http://pubs.rsc.org/-/content/articlelanding/2017/ta/c6ta09580a#!divAbstract

                                    责任编辑：向丹婷  联系方式：dtxiang@suda.edu.cn