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Research Article

Synthesis of MoX2 (X = Se or S) monolayers with high-concentration 1T' phase on 4H/fcc-Au nanorods for hydrogen evolution

Zhengqing Liu1,2, Xiao Zhang2, Yue Gong3,4, Qipeng Lu2, Zhicheng Zhang2, Hongfei Cheng2, Qinglang Ma2, Junze Chen2, Meiting Zhao2, Bo Chen2, Ye Chen2, Xue-Jun Wu2, Pengfei Yin2, Lin Gu3,4,5(), Yaping Du1(), Hua Zhang2()
School of Materials Science and Engineering & National Institute for Advanced Materials,Nankai University,Tianjin,300350,China;
Center for Programmable Materials,School of Materials Science and Engineering, Nanyang Technological; University, 50 Nanyang Avenue,Singapore,639798,Singapore;
Beijing National Laboratory for Condensed Matter Physics,Institute of Physics, Chinese Academy of Sciences,Beijing,100190,China;
School of Physical Sciences,University of Chinese Academy of Sciences,Beijing,100190,China;
Collaborative Innovation Center of Quantum Matter,Beijing,100190,China;
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Abstract

Controlled synthesis of transition metal dichalcogenide (TMD) monolayers with unusual crystal phases has attracted increasing attention due to their promising applications in electrocatalysis. However, the facile and large-scale preparation of TMD monolayers with high-concentration unusual crystal phase still remains a challenge. Herein, we report the synthesis of MoX2 (X = Se or S) monolayers with high-concentration semimetallic 1Tx phase by using the 4H/face-centered cubic (fcc)-Au nanorod as template to form the 4H/fcc-Au@MoX2 nanocomposite. The concentrations of 1Tx phase in the prepared MoSe2 and MoS2 monolayers are up to 86% and 81%, respectively. As a proof-of-concept application, the obtained Au@MoS2 nanocomposite is used for the electrocatalytic hydrogen evolution reaction (HER) in acid medium, exhibiting excellent performance with a low overpotential of 178 mV at the current density of 10 mA/cm2, a small Tafel slope of 43.3 mV/dec, and excellent HER stability. This work paves a way for direct synthesis of TMD monolayers with high-concentration of unusual crystal phase for the electrocatalytic application.

Keywords

MoS2 monolayerssemimetallic 1Tx phase4H/face-centered cubic (fcc)-Au nanorodshydrogen evolution

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Nano Research
Volume 12 Issue 6,
June 2019
Pages 1301-1305
DOI: 10.1007/s12274-018-2212-8
Cite this article:
Liu Z, Zhang X, Gong Y, et al. Synthesis of MoX2 (X = Se or S) monolayers with high-concentration 1T' phase on 4H/fcc-Au nanorods for hydrogen evolution. Nano Research, 2019, 12(6): 1301-1305. https://doi.org/10.1007/s12274-018-2212-8
Topics:
Electrocatalysis HydrogenLayered semiconductorsMolybdenum compoundsMonolayersNanocompositesNanorodsSeleniumSelenium compoundsTransition metals
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