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MoS2 nanoparticles coupled to SnS2 nanosheets: The structural and electronic modulation for synergetic electrocatalytic hydrogen evolution

Author:
Hu, Lin, Song, Xiu-Feng, Zhang, Sheng-Li, Zeng, Hai-Bo, Zhang, Xue-Ji, Marks, Robert, Shan, Dan
Source:
Journal of catalysis 2018 v.366 pp. 8-15
ISSN:
0021-9517
Subject:
hydrogen production, molybdenum disulfide, nanoparticles, nanosheets, spectroscopy
Abstract:
The electrocatalytic hydrogen evolution reaction (HER) is one of the core components of energy conversions. The chemical-physical properties and morphological structures of electrocatalysts are the main factors that determine the HER performance. Thus, the rational design of efficient electrocatalysts is essentially required. A new heteronanostructured system is proposed, which comprises MoS₂ nanoparticles (MoS₂ NPs) coupled to SnS₂ ultrathin nanosheets (SnS₂ NS) and operates as an efficient HER electrocatalyst. Advanced spectroscopic techniques are applied to confirm formation of heteronanostructure and occurred electron modulation of MoS₂ NPs/SnS₂ NS. Surprisingly, the MoS₂ NPs/SnS₂ NS electrocatalyst is highly efficient for HER with a low overpotential (∼0.249 V at the current density of 10 mA cm⁻²), small Tafel slope (∼42.1 mV decade⁻¹) and excellent electrocatalytical stability.
Agid:
6128783