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An electrochemical anodization strategy towards high-activity porous MoS2 electrodes for the hydrogen evolution reaction

机译:高活性多孔MoS2电极用于析氢反应的电化学阳极氧化策略

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Molybdenum disulfide (MoS _(2) ) is a promising non-precious metal electrocatalyst for the hydrogen evolution reaction (HER). Herein, we have described an anodization route for the fabrication of porous MoS _(2) electrodes. The active porous MoS _(2) layer was directly formed on the surface of a Mo metal sheet when it was subjected to anodization in a sulfide-containing electrolyte. The Mo sheet served as both a supporter for MoS _(2) electrocatalysts and a conductive substrate for electron transport. After optimizing the anodization parameters, the anodized MoS _(2) electrode showed a high electrocatalytic activity with an onset potential of ?0.18 V ( vs. RHE) for the HER, a Tafel slope of ~101 mV per decade and an overpotential of 0.23 V at a current density of 10 mA cm ~(?2) for the HER. These results indicate that our facile anodization strategy is an efficient route towards a high-activity MoS _(2) electrode.
机译:二硫化钼(MoS _(2))是一种有前途的用于氢气析出反应(HER)的非贵金属电催化剂。在这里,我们已经描述了用于制造多孔MoS_(2)电极的阳极氧化途径。当在含硫化物的电解质中进行阳极氧化时,活性多孔MoS_(2)层直接形成在Mo金属片的表面上。 Mo片既用作MoS_(2)电催化剂的载体,又用作电子传输的导电基质。优化阳极氧化参数后,阳极氧化的MoS _(2)电极显示出较高的电催化活性,HER的起始电势约为0.18 V(相对于RHE),Tafel斜率为每十倍〜101 mV,超电势为0.23对于HER,电流密度为10 mA cm〜(?2)。这些结果表明,我们简便的阳极氧化策略是一条通往高活性MoS _(2)电极的有效途径。

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