Tsou Sheng-Jung, Mazurkiewicz-Pawlicka Marta, Chiou Yuh-Jing, Lin Chung-Kwei
Department of Chemical Engineering and Biotechnology, Tatung University, Taipei 104-327, Taiwan.
Research Center of Digital Oral Science and Technology, College of Oral Medicine, Taipei Medical University, Taipei 110-301, Taiwan.
Nanomaterials (Basel). 2024 Jan 11;14(2):162. doi: 10.3390/nano14020162.
Global energy sources are limited, and energy requirements are ever-increasing due to the demand for developments in human life and technology. The environmentally friendly direct formic acid fuel cell (DFAFC) is an attractive electronic device due to its clean energy. In a DFAFC, an anodic catalyst plays an important role concerning the oxidation pathway and activity. In the present study, palladium (Pd) was synthesized by synchrotron X-ray photoreduction using various irradiation times (0.5-4 min) to control the particle size. An acid-treated carbon nanotube (A-CNT) was used as the template for Pd deposition. The A-CNT and Pd/A-CNT were examined using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and transmission electron microscopy to reveal the microstructural characteristics. Electrochemical evaluation, electrocatalytic activity, and the DFAFC performance of so-obtained Pd/A-CNT catalysts were investigated. The experiment's results showed that the Pd/A-CNT-2 (i.e., synchrotron photoreduction for 2 min) underwent a direct formic acid oxidation pathway and possessed a high ECSA value of 62.59 m/g and superior electrocatalytic activity of 417.7 mA/mg. In a single DFAFC examination, the anodic Pd/A-CNT-2 catalyst had a power density of 106.2 mW/mg and a relatively long lifetime of 2.91 h. Pd/A-CNT-2 anodic catalysts synthesized by surfactant-free synchrotron X-ray photoreduction with a rapid processing time (2 min) are potential candidates for DFAFC applications.
全球能源资源有限，而由于人类生活和技术发展的需求，能源需求却在不断增加。环境友好型直接甲酸燃料电池（DFAFC）因其清洁能源而成为一种有吸引力的电子设备。在DFAFC中，阳极催化剂在氧化途径和活性方面起着重要作用。在本研究中，通过同步加速器X射线光还原法，利用不同的辐照时间（0.5 - 4分钟）合成钯（Pd）以控制粒径。用酸处理过的碳纳米管（A-CNT）作为Pd沉积的模板。使用扫描电子显微镜、X射线衍射、拉曼光谱和透射电子显微镜对A-CNT和Pd/A-CNT进行检测，以揭示其微观结构特征。研究了如此获得的Pd/A-CNT催化剂的电化学评估、电催化活性和DFAFC性能。实验结果表明，Pd/A-CNT-2（即同步加速器光还原2分钟）经历直接甲酸氧化途径，具有62.59 m/g的高ECSA值和417.7 mA/mg的优异电催化活性。在单电池DFAFC测试中，阳极Pd/A-CNT-2催化剂的功率密度为106.2 mW/mg，寿命相对较长，为2.91小时。通过无表面活性剂的同步加速器X射线光还原法快速处理（2分钟）合成的Pd/A-CNT-2阳极催化剂是DFAFC应用的潜在候选材料。
