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碳载铂镍八面体纳米粒子（oct-PtNi/C）作为质子交换膜燃料电池阴极催化剂的性能研究

丰紫薇a, 陈海忠a, 段骁b, 唐玲b, 赵云昆b, 黄龙a,b,*   

  1. a. 云南省现代分离分析与物质转化重点实验室, 云南师范大学化学化工学院, 昆明, 650500, 中国; b. 贵金属功能材料国家重点实验室，云南省贵金属实验室股份有限公司, 昆明, 650106, 中国
  • 发布日期:2025-10-13
  • 通讯作者: 黄龙 E-mail:longhuang@ynnu.edu.cn

Carbon Supported Octahedral PtNi Nanoparticles (oct-PtNi/C) as Cathode Catalyst for Proton Exchange Membrane Fuel Cells (PEMFCs) with Improved Activity and Durability

Ziwei Fenga, Haizhong Chena, Xiao Duanb, Ling Tangb, Yunkun Zhaob, Long Huanga,b,*   

  1. a. Yunnan Key Laboratory of Modern Separation Analysis and Substance Transformation, College of Chemistry and Chemical Engineering, Yunnan Normal University, Kunming, Yunnan, 650500, P.R. China; b. State Key Laboratory of Precious Metal Functional Materials, Yunnan Precious Metals Laboratory Co., Ltd., Kunming, Yunnan, 650106, P.R. China.
  • Online:2025-10-13
  • Contact: Long Huang E-mail:longhuang@ynnu.edu.cn

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摘要： 质子交换膜燃料电池（PEMFC）是一种有前景的能量转换装置，但其大规模商业应用受制于高昂的成本和较低的性能。PEMFC的性能主要受限于阴极氧还原反应（ORR）的动力学。铂是对氧还原反应催化活性最高的单金属，但是其性能仍难以满足商业化应用。前期研究表明，铂镍八面体纳米粒子（oct-PtNi-NPs）在半电池中具有优异的ORR活性，但其在膜电极组件（MEA）中的性能报道较少。本论文研究了碳载铂镍八面体纳米粒子（oct-PtNi/C）作为阴极催化剂的膜电极性能。研究结果表明，温和的酸洗条件可溶解oct-PtNi/C表面不稳定的Ni原子，得到PNC-A催化剂；以PNC-A催化剂为阴极催化剂的MEA性能提高：阴极Pt负载量为0.2 mg∙cm-2时，MEA的最大功率密度达到1.0 W∙cm-2，比使用Pt/C作为催化剂时高15%；30,000圈加速老化实验（ADT）后，使用PNC-A催化剂的MEA的性能保持率为82%，高于Pt/C（74%）。本论文研究了使用PNC-A催化剂作为PEMFC阴极催化剂的可能性，提高了PEMFC的性能，同时降低了贵金属Pt的用量。

关键词: 质子交换膜燃料电池, 铂镍八面体, 氧还原, 膜电极组件

Abstract: Proton exchange membrane fuel cells (PEMFCs) is considered as a promising renewable power source. However, the massive commercial application of PEMFCs was greatly hindered by their high expense and less-satisfied performance mainly due to the sluggish oxygen reduction reaction (ORR) kinetics even on state-of-the-art Pt catalyst. Octahedral PtNi nanoparticles (oct-PtNi NPs) with excellent ORR activity in half-cell have been widely studied, while their performance in membrane electrode assembly (MEA) was much less reported. Herein, we investigated the MEA performance using carbon supported oct-PtNi NPs (oct-PtNi/C) as cathode catalyst. Under mild acid washing condition, the surface Ni atoms of oct-PtNi/C were largely removed, and the performance of the MEA using the acid-leaching oct-PtNi/C (PNC-A) as the cathode catalyst was greatly improved. The maximum power density of the MEA reaches 1.0 W·cm-2 with cathode Pt loading of 0.2 mg·cm-2, which is 15% higher than that using Pt/C as the catalyst. After 30k accelerated degradation test (ADT), the MEA using PNC-A as catalysts shows a performance retention of 82%, higher than that of Pt/C (74%). The results reported here verify the possibility of using PNC-A as an advanced cathode catalyst in PEMFCs, thus can enhancing the performance of PEMFCs while lowering the amount of expensive Pt.

Key words: PEMFC, oct-PtNi-NPs, oxygen reduction reaction (ORR), membrane electrode assembly (MEA)

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