Hierarchical N-doped carbon nanofiber-loaded NiCo alloy nanocrystals with enhanced methanol electrooxidation for alkaline direct methanol fuel cells

被引:40
作者
Chen, Fei [1 ,2 ,3 ]
Guo, Shiquan [1 ,2 ,3 ]
Yu, Shuyan [1 ,2 ,3 ]
Zhang, Chong [1 ,2 ,3 ]
Guo, Man [1 ,2 ,3 ]
Li, Congju [1 ,2 ,3 ]
机构
[1] Univ Sci & Technol Beijing, Sch Energy & Environm Engn, Beijing 100083, Peoples R China
[2] Beijing Key Lab Resource oriented Treatment Ind Po, Beijing 100083, Peoples R China
[3] Univ Beijing, Energy Conservat & Environm Protect Engn Res Ctr, Beijing 100083, Peoples R China
基金
中国国家自然科学基金;
关键词
Alkaline direct methanol fuel cell; Non-precious metals; N-doped carbon nanofiber; Metal-organic frameworks; CO-resistant MOR electrocatalyst; BIMETALLIC NANOPARTICLES; OXIDATION; ELECTROCATALYSTS; CATALYSTS; EFFICIENT; CO;
D O I
10.1016/j.jcis.2023.05.030
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 high catalytic activity of non-precious metals in alkaline media opens a new direction for the development of alkaline direct methanol fuel cell (ADMFC) electrocatalysts. Herein, a highly dispersed N-doped carbon nano-fibers (CNFs)-loaded NiCo non-precious metal alloy electrocatalyst based on metal-organic frameworks (MOFs) was prepared, which conferred excellent methanol oxidation activity and resistance to carbon monoxide (CO) poisoning through a surface electronic structure modulation strategy. The porous electrospun polyacrylonitrile (PAN) nanofibers and the P-electron conjugated structure of polyaniline chains provide fast charge transfer channels, enabling electrocatalysts with abundant active sites and efficient electron transfer. The optimized NiCo/N-CNFs@800 was tested as an anode catalyst for ADMFC single cell and exhibited a power density of 29.15 mW cm-2. Due to the fast charge transfer and mass transfer brought by its one-dimensional porous structure and the synergistic effect between NiCo alloy, NiCo/N-CNFs@800 is expected to be an economical, efficient and CO-resistant methanol oxidation reaction (MOR) electrocatalyst.
引用
收藏
页码:43 / 53
页数:11
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