Liu Yuanyuan, Zhu Zhunda, Deng Zhuoya, Wang Pengfei, Chae Sangwoo, Sawada Yasuyuki, Saito Nagahiro
Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan
Institute of Innovation for Future Society, Nagoya University Furo-cho, Chikusa-ku Nagoya 464-8603 Japan.
RSC Adv. 2025 Apr 22;15(16):12677-12688. doi: 10.1039/d5ra01747e. eCollection 2025 Apr 16.
Platinum-based catalysts are widely used in polymer electrolyte fuel cells (PEMFCs) due to their excellent catalytic activity for the oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR). In this study, a PtPdIr ternary alloy catalyst was synthesized by a solution plasma (SP) sputtering process with PtPd and PtIr erelctrodes, which provides a non-equilibrium reaction field in solution. The ratio of Ir in the PtPdIr nanoparticles increased as the ratio of Ir in the PtIr electrode increased. However, the ratio reamined constant at about 10%. The size of the nanoparticles could be controlled in the range of 1-3 nm. In addition, the nanoparticles were well dispersed when supported on carbon and no agglomeration was observed. The electrochemical properties of the obtained nanoparticles were investigated in terms of ORR and HOR, and the particle-c (79 : 14 : 7) nanoparticle exhibited the highest ORR and HOR performance. XPS analysis showed that the intensity of I and I in particle-c (79 : 14 : 7) was at the same level, and that the chemical bonding state of these elements enhances ORR and HOR activity.
基于铂的催化剂因其对氧还原反应（ORR）和氢氧化反应（HOR）具有优异的催化活性而被广泛应用于聚合物电解质燃料电池（PEMFC）中。在本研究中，通过溶液等离子体（SP）溅射工艺，以PtPd和PtIr电极合成了PtPdIr三元合金催化剂，该工艺在溶液中提供了一个非平衡反应场。PtPdIr纳米颗粒中Ir的比例随着PtIr电极中Ir比例的增加而增加。然而，该比例在约10%时保持恒定。纳米颗粒的尺寸可控制在1-3纳米范围内。此外，纳米颗粒负载在碳上时分散良好，未观察到团聚现象。从ORR和HOR方面研究了所得纳米颗粒的电化学性能，颗粒-c（79 : 14 : 7）纳米颗粒表现出最高的ORR和HOR性能。XPS分析表明，颗粒-c（79 : 14 : 7）中I和I的强度处于同一水平，并且这些元素的化学键合状态增强了ORR和HOR活性。
