Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/162773
Title: Graphene quantum dot enabled interlayer spacing and electronic structure regulation of single-atom doped MoS₂ for efficient alkaline hydrogen evolution
Authors: Gong, Jun
Zhang, Zheye
Xi, Shibo
Wang, Wenjun
Lu, Jianmei
Chen, Peng
Keywords: Engineering::Chemical engineering
Issue Date: 2023
Source: Gong, J., Zhang, Z., Xi, S., Wang, W., Lu, J. & Chen, P. (2023). Graphene quantum dot enabled interlayer spacing and electronic structure regulation of single-atom doped MoS₂ for efficient alkaline hydrogen evolution. Chemical Engineering Journal, 451, 138951-. https://dx.doi.org/10.1016/j.cej.2022.138951
Project: AMEIRG18-0016
Journal: Chemical Engineering Journal
Abstract: Interlayer engineering of two-dimensional (2D) materials is believed to be a key to enhance their performance for catalysis and other applications. Herein, molybdenum disulfide intercalated with heteroatom-doped graphene quantum dots and individually dispersed Co atoms (GQD/Co-MoS2) is readily synthesized by a one-pot hydrothermal reaction. With better long-term stability, GQD/Co-MoS2 shows comparable catalytic performance as commercial Pt/C catalyst for hydrogen evolution reaction in alkaline medium at low current densities (overpotential of 53 vs 44 mV at 10 mA cm−2) and outperforms Pt/C at high current densities (106 vs 172 mV at 100 mA cm−2). Based on both experimental and theoretical investigations, the outstanding performance is mainly attributed to the enlarged interlayer spacing and electronic coupling at the 0D/2D van der Waals heterojunctions between GQDs and Co-doped MoS2. In principle, a variety of GQD intercalated 2D materials with atomic doping of one or more metallic elements can be similarly synthesized for diverse applications.
URI: https://hdl.handle.net/10356/162773
ISSN: 1385-8947
DOI: 10.1016/j.cej.2022.138951
Rights: © 2022 Elsevier B.V. All rights reserved. This paper was published in Chemical Engineering Journal and is made available with permission of Elsevier B.V.
Fulltext Permission: embargo_20250108
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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