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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Ultrafast synthesis of molybdenum carbide nanoparticles for efficient hydrogen generation
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Ultrafast synthesis of molybdenum carbide nanoparticles for efficient hydrogen generation

机译：碳化钼纳米粒子超快合成高效氢气

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摘要

A facile and ultrafast synthesis of molybdenum carbide coated with few-layer carbon (MoC/C) has been developed, and the effect of reducing the thickness of the carbon coating on its catalytic activity in the hydrogen evolution reaction (HER) has been demonstrated. MoC/C produces a current density of 20 mA cm(-2) at an overpotential of 144 mV and a Tafel slope of 63.6 mV dec(-1) in 0.5 M H2SO4, and works stably under long-term electrolysis. MoC/C is one of the most active carbide electrocatalysts reported thus far, although MoC is not even the most active phase of molybdenum carbide and MoC/C has a small surface area. Complementary density functional theory calculations have afforded insight into this novel catalyst design, showing that increasing the thickness of the carbon layer leads to the composite system losing the characteristics of MoC and behaving more like a carbon surface, and thereby resulting in a reduction in HER activity.
机译：已经开发了涂有几层碳（MOC / C）的碳化钼（MOC / C）的容易和超快合成，并且已经证明了在氢进化反应（她）中碳涂层厚度降低碳涂层厚度的效果。 MOC / C在0.5M H 2 SO 4中产生144mV的过电位和63.6mV DEC（-1）的TAFEL斜率的电流密度为20 mA cm（-2），并在长期电解下稳定地工作。 MOC / C是迄今为止报道的最活跃的碳化物电催化剂之一，虽然MOC甚至不是最活跃的碳化钼和MOC / C的表面积。 互补密度函数理论计算得到了洞察这一新型催化剂设计的洞察力，表明碳层的厚度导致复合系统失去MOC的特性并表现得更像碳表面，从而导致她的活动减少 。

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