电解质
阴极
材料科学
聚合物
质子交换膜燃料电池
化学工程
膜
聚合物电解质
碳纤维
燃料电池
纳米技术
复合材料
电极
化学
离子电导率
生物化学
物理化学
复合数
工程类
作者
Weiqi Zhang,Yuan Chen,Jun Yuan,Huiyuan Liu,Qiang Ma,Qian Xu,Huaneng Su
标识
DOI:10.1016/j.ijhydene.2024.04.024
摘要
Carbon corrosion of Pt/C electrocatalyst in the cathode is a critical issue for the practical application of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs). Herein, we introduce a nanolayer composed of TiO2 nanoparticles between Pt and carbon support, which not only protects the carbon from corrosion but also forms a strong metal-support interaction between Pt and TiO2. The Pt nanoparticles are uniformly dispersed on the prepared C@TiO2 support (mean size: 2.27 nm). After potential sweeping for 5000 cycles in the acid solution, the electrochemical surface area loss of the homemade Pt/C@TiO2 is 10.9%, which is approximately half of that of commercial Pt/C (19.1%). In the practical HT-PEMFC single cell, Pt/C@TiO2 exhibits superior durability than Pt/C as well. After the accelerated durability test, the maximum power density of Pt/C@TiO2-MEA decreases by 8.6%, which is significantly lower than that of Pt/C-MEA (23.9%), suggesting a great potential application of Pt/C@TiO2 in HT-PEMFCs.
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