Pure and stable metallic phase molybdenum disulfide nanosheets for hydrogen evolution reaction

被引：0
作者：
Xiumei Geng
Weiwei Sun
Wei Wu
Benjamin Chen
Alaa Al-Hilo
Mourad Benamara
Hongli Zhu
Fumiya Watanabe
Jingbiao Cui
Tar-pin Chen
机构：
[1] University of Arkansas at Little Rock,Department of Physics and Astronomy
[2] 2801 South University Avenue,Department of Physics
[3] Little Rock,Department of Mechanical and Industrial Engineering
[4] Arkansas 72204,Department of Physics and Materials Science
[5] USA,undefined
[6] University at Buffalo,undefined
[7] Institute for Nanoscale Materials Science and Engineering,undefined
[8] University of Arkansas,undefined
[9] Northeastern University,undefined
[10] University of Memphis,undefined
[11] Memphis,undefined
[12] Tennessee 38152,undefined
[13] USA,undefined
来源：
Nature Communications | / 7卷
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摘要：
Metallic-phase MoS2 (M-MoS2) is metastable and does not exist in nature. Pure and stable M-MoS2 has not been previously prepared by chemical synthesis, to the best of our knowledge. Here we report a hydrothermal process for synthesizing stable two-dimensional M-MoS2 nanosheets in water. The metal–metal Raman stretching mode at 146 cm−1 in the M-MoS2 structure, as predicted by theoretical calculations, is experimentally observed. The stability of the M-MoS2 is associated with the adsorption of a monolayer of water molecules on both sides of the nanosheets, which reduce restacking and prevent aggregation in water. The obtained M-MoS2 exhibits excellent stability in water and superior activity for the hydrogen evolution reaction, with a current density of 10 mA cm−2 at a low potential of −175 mV and a Tafel slope of 41 mV per decade.
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