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Synthesis of modified, ordered mesoporous carbon-supported Pt3Cu catalyst for enhancing the oxygen reduction activity and durability
International Journal of Hydrogen Energy ( IF 7.2 ) Pub Date : 2021-09-23 , DOI: 10.1016/j.ijhydene.2021.09.042
Yinlei Li 1 , Fusheng Gui 1 , Fanghui Wang 1 , Jianjun Liu 1 , Hong Zhu 1
Affiliation  

The modification of carbon-supported components plays an important role in increasing the interaction between carbon-supported and metal-active components in the application of PEMFC catalysts. Here, we propose a strategy for designing a catalyst by covalently modifying ordered mesoporous carbon (MC) CMK-3 and loading Pt3Cu onto modified, ordered mesoporous carbon. Ammonium persulfate (APS) was used as a modifying agent. The surface chemistry and structural properties of the modified mesoporous carbon (MMC) were characterized by BET, XPS, Raman, etc. As a result, the MMC retains the original ordered structure and introduces many oxygen-containing functional groups on the surface of MMC. Due to the optimized properties of MMC, the Pt3Cu/MMC have shown excellent mass activity of 0.58 A/mgPt, which are twice that of Pt3Cu/MC and 4.8 times of JM Pt/C. Besides, the durability test showed that after 10 K cycles, the mass activity loss was only 12.06%, exhibiting excellent electrochemical stability. In addition, the MEA shows a high power density up to 641 mW cm−2, which demonstrate a great potential of modified mesoporous carbon catalyst in practical application.



中文翻译:

用于提高氧还原活性和耐久性的改性有序介孔碳负载 Pt3Cu 催化剂的合成

碳载组分的改性在增加碳载组分与金属活性组分在 PEMFC 催化剂应用中的相互作用方面起着重要作用。在这里,我们提出了一种通过共价修饰有序介孔碳 (MC) CMK-3 并将 Pt 3 Cu负载到修饰的有序介孔碳上来设计催化剂的策略。过硫酸铵 (APS) 用作改性剂。改性介孔碳 (MMC) 的表面化学和结构性质通过 BET、XPS、拉曼等表征。因此,MMC 保留了原来的有序结构,并在 MMC 表面引入了许多含氧官能团。由于 MMC 的优化特性,Pt 3Cu/MMC 显示出 0.58 A/mgPt 的优异质量活性,是 Pt 3 Cu/MC 的两倍和 JM Pt/C 的 4.8 倍。此外,耐久性测试表明,经过 10 K 次循环后,质量活性损失仅为 12.06%,表现出优异的电化学稳定性。此外,MEA 显示出高达 641 mW cm -2的高功率密度,这证明了改性介孔碳催化剂在实际应用中的巨大潜力。

更新日期:2021-10-20
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