用于高电流密度析氢的廉价矿物基2D电催化剂的高产量生产
High-Throughput Production of Cheap Mineral-Based 2D Electrocatalysts for High-Current-Density Hydrogen Evolution
摘要：
在工业所需的高电流密度下工作良好的廉价、高效和耐用的电催化剂的高通量可规模化生产是电化学技术大规模实施的巨大挑战。在这里，我们报告的生产的2D二硫化钼为基础的油墨型电催化剂，通过一个可扩展的自上而下的剥离技术，然后通过一个简单的热处理。对于析氢反应（HER），该催化剂在454 mV的过电位下显示出1000 mA cm^-2的高电流密度，无需iR校正，并且在24小时内具有良好的稳定性。用同样的方法，我们首次制备了廉价的MoS 2矿物基催化剂，发现它具有优异的高电流密度HER性能，产率比以前报道的高1 ~ 2个数量级。此外，MoS 2矿物的价格比商业Pt催化剂低五个数量级，使得基于MoS 2矿物的催化剂便宜，并且油墨型催化剂分散体可以容易地与用于大规模催化剂电极制备的其他技术集成。这些优点表明了这种方法的巨大潜力和矿物基廉价而丰富的天然资源作为催化剂在电化学技术中的应用。
英文摘要：
The high-throughput scalable production of cheap, efficient and durable electrocatalysts that work well at high current densities demanded by industry is a great challenge for the large-scale implementation of electrochemical technologies. Here we report the production of a 2D MoS2-based ink-type electrocatalyst by a scalable top-down exfoliation technique followed by a simple heat treatment. The catalyst shows a high current density of 1000 mA cm^-2 at an overpotential of 454 mV for the hydrogen evolution reaction (HER) without the need of iR correction, as well as good stability over 24 hours. Using the same method, we have, for the first time, produced a cheap MoS2 mineral-based catalyst and found that it had an excellent performance for high-current-density HER. Noteworthy, production rate of this MoS2-based catalyst is one to two orders of magnitude higher than those previously reported. In addition, the price of the MoS2 mineral is five orders of magnitude lower than commercial Pt catalysts, making the MoS2 mineral-based catalyst cheap, and the ink-type catalyst dispersions can be easily integrated with other technologies for large-scale catalyst electrode preparation. These advantages indicate the huge potentials of this method and mineral-based cheap and abundant natural resources as catalysts in the electrochemical technologies.
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