title: Coral-Shaped MoS2Decorated with Graphene Quantum Dots Performing as a Highly Active Electrocatalyst for Hydrogen Evolution Reaction.
abstract: We report a new CVD method to prepare coral-shaped monolayer MoS2with a large amount of exposed edge sites for catalyzing hydrogen evolution reaction. The electrocatalytic activities of the coral-shaped MoS2can be further enhanced by electronic band engineering via decorated with graphene quantum dot (GQD) decoration. Generally, GQDs improve the electrical conductivity of the MoS2electrocatalyst. 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.
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Bangjun
authors.identifier: http://orcid.org/0000-0001-6353-5190
authors.initials: B
authors.lastname: Guo
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Ke
authors.identifier: http://orcid.org/0000-0002-9920-2555
authors.initials: K
authors.lastname: Yu
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Honglin
authors.initials: H
authors.lastname: Li
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Ruijuan
authors.initials: R
authors.lastname: Qi
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Haili
authors.initials: H
authors.lastname: Song
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Tang
authors.affiliation: Key Laboratory of Polar Materials and Devices (Ministry of Education of China), Department of Electronic Engineering, East China Normal University , Shanghai 200241, China.
authors.forename: Ziqiang
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University , Shanghai 200030, China.|WPI Advanced Institute for Materials Research, Tohoku University , Sendai 980-8577, Japan.|CREST, Japan Science and Technology Agency (JST) , Saitama 332-0012, Japan.
authors.forename: Mingwei
authors.initials: M
authors.lastname: Chen
keywords: coral shape; electrocatalysis; graphene quantum dots; hydrogen evolution reaction; monolayer molybdenum disulfide