Metal-free nitrogen-rich glassy carbon as an electrocatalyst for hydrogen evolution reaction

被引：20

作者：

Thirukumaran, Periyasamy ^{[1
]}

Balasubramanian, Rukmanikrishnan ^{[1
]}

Atchudan, Raji ^{[1
]}

Parveen, Asrafali Shakila ^{[2
]}

Lee, Yong Rok ^{[1
]}

Kim, Seong-Cheol ^{[1
]}

机构：

[1] Yeungnam Univ, Sch Chem Engn, Gyongsan 38541, South Korea

[2] Myongji Univ, Dept Mat Sci & Engn, Yongin 449728, Gyeonggi Do, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 2020年 / 124卷

关键词：

Polybenzoxazine; Glassy carbon; Electrocatalyst; Hydrogen evolution reaction; N-DOPED GRAPHENE; NANOPOROUS GRAPHENE; POROUS CARBONS; FRUIT EXTRACT; POLYBENZOXAZINE; NANOSHEETS; CATALYSTS; DOTS; SUPERCAPACITORS; BENZOXAZINES;

D O I：

10.1016/j.materresbull.2019.110734

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new metal-free nitrogen-rich glassy carbon (MF-NGC) was fabricated from polybenzoxazine through carbonization and KOH chemical activation method. Benzoxazine monomer was synthesized from hydroquinone, urea and paraformaldehyde, followed by ring-opening polymerization to produce nitrogen-rich polybenzoxazine. The obtained polybenzoxazine after carbonization and KOH activation results in the formation of MF-NGC. Chemical structure of the new benzoxazine monomer was confirmed by FUR and NMR spectroscopy. The amorphous nature of carbon was confirmed by XRD analysis with low degree of graphitization as analyzed by XRD and Raman techniques. SEM images portray MF-NGC containing C, N and O with N content of about 11.3 wt%. BET investigation measures the surface area of MF-NGC to be 166 m(2)/g with numerous mesopores and few macropores. Furthermore, MF-NGC was thoroughly investigated by relating physicochemical and electrochemical techniques. The doped nitrogen species with interconnected carbon matrix affords rich active sites suitable for HER. MF-NGC exhibits the lowest overpotential of - 190 mV(RHE) and Tafel slope of 55 mV dec(-1) in 0.5 M H2SO4 aqueous electrolyte possessing outstanding catalytic activity and excellent stability towards HER.

引用

页数：9

共 56 条

[21] Straightforward synthesis of nitrogen-doped carbon nanotubes as highly active bifunctional electrocatalysts for full water splitting [J].