Lu Junda, Guo Jia, Song Shihao, Yu Guangfa, Liu Hui, Yang Xiaojing, Lu Zunming
School of Materials Science and Engineering, Hebei University of Technology Tianjin 300130 China
School of Materials Science and Engineering, Tianjin University Tianjin 300072 China
RSC Adv. 2020 Oct 19;10(63):38583-38587. doi: 10.1039/d0ra06682f. eCollection 2020 Oct 15.
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 SAG and 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 and 120 min, respectively, the sample displays an optimal activity with an overpotential of 362 mV at 10 mA cm, 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.
气相火花烧蚀（SAG）技术具有绿色、快速淬火、动力学快的特点，专门用于生产表面清洁、尺寸小且缺陷丰富的金属纳米颗粒。在本研究中，通过氮气流利用SAG制备了银纳米颗粒并负载在碳纤维上。研究了载气流量和沉积时间对通过SAG制备的银纳米颗粒在碳纤维上的粒径和分散性的影响，并进一步研究了样品在酸性介质中的析氢反应（HER）性能。当载气流量和沉积时间分别控制在5 L/min和120 min时，样品在10 mA/cm²电流密度下的过电位为362 mV，表现出最佳活性，优于商业碳纤维负载银纳米颗粒。因此，这种合成技术为获得高效金属纳米催化剂提供了一种新途径，有望实现大规模应用。
