Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/155468
Title: Graphene quantum dots assisted exfoliation of atomically-thin 2D materials and as-formed 0D/2D van der Waals heterojunction for HER
Authors: Gong, Jun
Zhang, Zheye
Zeng, Zhiping
Wang, Wenjun
Kong, Linguxan
Liu, Jiyang
Chen, Peng
Keywords: Engineering::Chemical engineering
Issue Date: 2021
Source: Gong, J., Zhang, Z., Zeng, Z., Wang, W., Kong, L., Liu, J. & Chen, P. (2021). Graphene quantum dots assisted exfoliation of atomically-thin 2D materials and as-formed 0D/2D van der Waals heterojunction for HER. Carbon, 184, 554-561. https://dx.doi.org/10.1016/j.carbon.2021.08.063
Project: A1983c0025
MOE2017-T2-2-005
Journal: Carbon
Abstract: Atomically-thin 2D materials have changed the landscapes of many fields. Their applications however are limited by lack of methods for readily and scalable production with high quality. Herein, a simple strategy is reported to exfoliate pristine single or few-layered 2D materials (MoS2, h-BN, WS2, g-C3N4 microsheets) using bottom-up grown amphiphilic graphene quantum dots (GQDs) as both the intercalation agent and dispersant. Further, it is shown that the as-formed GQD/MoS2 van der Waals heterojunctions (vdWHs) give enhanced performance for electrocatalysis of hydrogen evolution reaction (HER) owing to the synergistic coupling at the 0D/2D heterojunction, delivering a current density of 10 mA cm−2 at a low overpotential of 160 mV with a small Tafel slope of 56.9 mV dec−1. In addition to providing a new method for preparing ultrathin 2D microsheets, this study unleashes the application potential of 2D materials and GQD-based 0D/2D vdWHs as non-precious electrocatalysts.
URI: https://hdl.handle.net/10356/155468
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2021.08.063
DOI (Related Dataset): 10.21979/N9/UZIK0N
Schools: School of Chemical and Biomedical Engineering 
Rights: © 2021 Elsevier Ltd. All rights reserved. This paper was published in Carbon and is made available with permission of Elsevier Ltd.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SCBE Journal Articles

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