Three-dimensional porous nitrogen-doped carbon nanosheets with ultra-high surface area for high-performance oxygen reduction reaction electrocatalysts

被引：5
作者：
Wang, Shenggao [1 ]
Li, Boyang [1 ]
Deng, Quanrong [1 ]
Mao, Yangwu [1 ]
Wang, Geming [1 ]
Gao, Yuan [1 ]
机构：
[1] Wuhan Inst Technol, Prov Key Lab Plasma Chem & Adv Mat, Wuhan 430073, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2023年 / 166卷
基金：
中国国家自然科学基金;
关键词：
Nitrogen -doped carbon nanosheets; Porous structure; Defects; Oxygen reduction reaction; ACTIVE-SITES; EFFICIENT; GRAPHENE; DEFECTS; CATALYST; SUPERCAPACITORS; FABRICATION; ELECTRODES; IRON;
D O I：
10.1016/j.materresbull.2023.112369
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A series of three-dimensional (3D) porous nitrogen-doped carbon nanosheets (PNCNs) have been successfully fabricated via a high-pressure carbonization followed by high-temperature thermal treatment. With the prolonging of thermal treatment time, the 3D PNCNs demonstrate several remarkable advantages for oxygen reduction reaction (ORR) electrocatalysts, including ultra-high specific surface area (more than 2100 m2/g-1), unique 3D porous structure, abundant defects, and suitable configuration of nitrogen. With these merits, the N-C2 h based electrocatalyst exhibits outstanding ORR activities with a comparable onset potential of -40 mV (vs. Ag/AgCl), half-wave potential of -120 mV (vs. Ag/AgCl), satisfactory electron transfer number (4) and superior stability to those of commercial 20% Pt/C. The excellent electrochemical behaviors of 3D PNCNs are confirmed to be dominated by structural characteristics, which can be optimized by varying thermal treatment time. Our work offers a promising way for controllably constructing carbon-based materials with optimized ORR performance.
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页数：9
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