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Preparation of Ag nanoparticles by spark ablation in gas as catalysts for electrocatalytic hydrogen production

机译：通过火花消融作为电催化氢气催化剂的Ag纳米粒子的制备

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Spark ablation in gas (SAG) technology has the characteristics of being green, fast quenching, fast dynamics and specializes in producing metallic nanoparticles with a clean surface, small size, and abundant defects. In this study, Ag nanoparticles were prepared via SAG and in situ loaded on a carbon fiber through nitrogen flow. The effect of the carrier gas flow rate and deposition time on the particle size and the dispersibility of the as-prepared Ag nanoparticles on the carbon fiber by SAG were investigated, and the hydrogen evolution reaction (HER) performances of the samples in acidic media were further studied. When the carrier gas flow rate and deposition time are controlled at 5 L min ~(?1) and 120 min, respectively, the sample displays an optimal activity with an overpotential of 362 mV at 10 mA cm ~(?2) , which is superior to commercial Ag nanoparticles on carbon fibers. Accordingly, this synthetic technology provides a new way to obtain efficient metallic nano-catalysts and is expected to achieve large-scale application.
机译：气体（SAG）技术的火花消融具有绿色，快速淬火，快速动态的特点，专门生产具有清洁表面，小尺寸和丰富缺陷的金属纳米颗粒。在该研究中，通过氮气通过凹陷和装载在碳纤维上的原位制备Ag纳米颗粒。研究了载气流速率和沉积时间对通过下垂的颗粒尺寸和制备的Ag纳米颗粒对碳纤维上的碳纤维的分散性的影响，并且酸性介质中样品的氢进化反应（她）是进一步研究。当载气流速和沉积时间分别控制在5L min〜（Δ1）和120分钟时，样品在10 mA cm〜（Δ2）下具有362mV的过电位，这是一种最佳活性优于碳纤维的商业Ag纳米颗粒。因此，该合成技术提供了一种获得有效的金属纳米催化剂的新方法，并且预期实现大规模的应用。

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