Encapsulation of Ni3Fe Nanoparticles in N-Doped Carbon Nanotube-Grafted Carbon Nanofibers as High-Efficiency Hydrogen Evolution Electrocatalysts

被引：201

作者：

Li, Tongfei ^{[1
]}

Luo, Gan ^{[1
]}

Liu, Kunhao ^{[1
]}

Li, Xin ^{[1
]}

Sun, Dongmei ^{[1
]}

Xu, Lin ^{[1
]}

Li, Yafei ^{[1
]}

Tang, Yawen ^{[1
]}

机构：

[1] Nanjing Normal Univ, Jiangsu Key Lab New Power Batteries, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Sch Chem & Mat Sci, Nanjing 210023, Jiangsu, Peoples R China

来源：

ADVANCED FUNCTIONAL MATERIALS | 2018年 / 28卷 / 51期

基金：

中国国家自然科学基金;

关键词：

electrospinning; hierarchical carbon nanofibers; hydrogen evolution reaction; Ni3Fe nanoparticles; nonprecious electrocatalysts; OXYGEN REDUCTION; HYBRIDS; CATALYSTS; TRENDS; MATRIX; ARRAYS;

D O I：

10.1002/adfm.201805828

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The exploration of cost-effective yet high-efficiency inexpensive electrocatalysts for the hydrogen evolution reaction (HER) is of critical significance for future renewable energy conversion technologies. A feasible electrospinning strategy to construct a novel 1D hierarchical nanoarchitecture comprising Ni3Fe nanoalloy-encapsulated carbon nanotubes grown onto N-doped carbon nanofibers (abbreviated as Ni3Fe@N-C NT/NFs) is demonstrated here. Benefiting from the abundant firmly immobilized Ni3Fe nanoparticles for catalytic sites and hierarchical fibrous nanostructures for effective electron transport and mass diffusion, the resultant Ni3Fe@N-C NT/NFs display an extraordinary HER activity with a low overpotential of 72 mV to reach a current density of 10 mA cm(-2) in KOH medium and a remarkable stability for 40 000 s. Theoretical studies corroborate that the resultant Ni3Fe@N-C NT/NFs exhibit a favorable Gibbs free energy of hydrogen adsorption (Delta G(H*) = -0.14 eV), further manifesting their superior HER activity. The present work will advance the development of highly efficient nonprecious electrocatalysts for energy conversion.

引用

页数：9

共 63 条

[1] Surface Evolution of PtCu Alloy Shell over Pd Nanocrystals Leads to Superior Hydrogen Evolution and Oxygen Reduction Reactions [J].