期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 4, 页码 3653-3660出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b14035
关键词
coral shape; monolayer molybdenum disulfide; graphene quantum dots; electrocatalysis; hydrogen evolution reaction
资金
- National Science Foundation of China [61574055, 61474043, 61425004]
- Open Project Program of Key Laboratory of Polar Materials and Devices, MOE [KFKT20140003]
- ECNU Outstanding Doctoral Dissertation Cultivation Plan of Action [YB2016032]
- JST-CREST Phase Interface Science for Highly Efficient Energy Utilization, JST, MEXT, Japan
We report a new CVD method to prepare coral-shaped monolayer MoS2 with a large amount of exposed edge sites for catalyzing hydrogen evolution reaction. The electrocatalytic activities of the coral-shaped MoS2 can be further enhanced by electronic band engineering via decorated with graphene quantum dot (GQD) decoration. Generally, GQDs improve the electrical conductivity of the MoS2 electrocatalyst. First-principles calculations suggest that the coral MoS2@GQD is a zero-gap material. The high electric conductivity and pronounced catalytically active sites give the hybrid catalyst outstanding electrocatalytic performance with a small onset overpotential of 95 mV and a low Tafel slope of 40 mV/dec as well as excellent long-term electrocatalytic stability. The present work provides a potential way to design two-dimensional hydrogen evolution reaction (HER) electrocatalysts through controlling the shape and modulating the electric conductivity.
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