Synthesis of modified, ordered mesoporous carbon-supported Pt3Cu catalyst for enhancing the oxygen reduction activity and durability

被引:17
|
作者
Li, Yinlei [1 ]
Gui, Fusheng [1 ]
Wang, Fanghui [1 ]
Liu, Jianjun [1 ]
Zhu, Hong [1 ]
机构
[1] Beijing Univ Chem Technol, Coll Chem, State Key Lab Chem Resource Engn Inst Modern Cata, Dept Organ Chem, Beijing 100029, Peoples R China
基金
中国国家自然科学基金;
关键词
Modified carbon; Ordered mesoporous carbon; PEMFCs; ORR; Electrochemical stability; WET OXIDATION; SURFACE-CHEMISTRY; ELECTROCATALYSTS; NANOPARTICLES; PERFORMANCE; STABILITY; PROGRESS; FDU-15;
D O I
10.1016/j.ijhydene.2021.09.042
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:37802 / 37813
页数:12
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