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Title: Oxygen doped MoS2 quantum dots for efficient electrocatalytic hydrogen generation
Authors: Peng, Juan
Yu, Xueping
Meng, Yang
Tan, Huiteng
Song, Pin
Liu, Zheng
Yan, Qingyu
Keywords: Engineering::Materials
Issue Date: 2020
Source: Peng, J., Yu, X., Meng, Y., Tan, H., Song, P., Liu, Z., & Yan, Q. (2020). Oxygen doped MoS2 quantum dots for efficient electrocatalytic hydrogen generation. The Journal of Chemical Physics, 152(13), 134704-. doi:10.1063/1.5142204
Project: MOE2017- T2-2-069
Journal: The Journal of Chemical Physics
Abstract: In this study, we report an oxygen-doped MoS2 quantum dot (O-MoS2 QD) hybrid electrocatalyst for the hydrogen evolution reaction (HER). The O-MoS2 QDs were prepared with a one-pot microwave method by hydrazine-mediated oxygen-doping. The synthetic method is straightforward, time-saving, and can be applied in large scale preparation. Ultra-small O-MoS2 QDs with the average size of 5.83 nm and 1-4 layers can be uniformly distributed on the surface of reduced graphene oxide (RGO). Benefited from the unique structure and the doping effect of oxygen in the MoS2 QDs and the great number of active sites, the O-MoS2 QD hybrid displayed outstanding electrocatalytic performance toward HER. A low overpotential of 76 mV at 10 mA/cm2 and a Tafel slope of 58 mV/dec were obtained in an acidic solution toward HER. Additionally, the resultant O-MoS2 QD hybrid also exhibited excellent stability and durability toward HER, displaying negligible current density loss after 1000 cycles of cyclic voltammetry. The design and synthesis of the electrocatalyst in this work open up a prospective route to prepare active and stable electrocatalysts toward substituting precious metals for hydrogen generation.
ISSN: 0021-9606
DOI: 10.1063/1.5142204
Rights: © 2020 The Author(s). All rights reserved. This paper was published by AIP in The Journal of Chemical Physics and is made available with permission of The Author(s).
Fulltext Permission: embargo_20210413
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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