首页|FeNi alloys incorporated N-doped carbon nanotubes as efficient bifunctional electrocatalyst with phase-dependent activity for oxygen and hydrogen evolution reactions

FeNi alloys incorporated N-doped carbon nanotubes as efficient bifunctional electrocatalyst with phase-dependent activity for oxygen and hydrogen evolution reactions

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Electrochemical oxygen evolution reaction(OER)and hydrogen evolution reaction(HER)are two impor-tant half-cell reactions for overall water splitting.The rational design and fabrication of efficient electro-catalysts involving nonprecious-metals and carbon matrix is highly attractive.Herein,a series of N-doped carbon nanotubes encapsulated FeNi alloy nanoparticles(FeNi@NCNTs)are synthesized via a simple py-rolysis treatment of Fe-doped Ni(OH)2 precursors under the assistance of dicyandiamine source.The re-sults reveal that the Fe/Ni ratio has an obvious influence on the morphology and phase composition of FeNi@NCNTs series,thus affecting the electrocatalytic performance.The highest electrocatalytic activity is achieved for the Fe1Ni4@NCNTs product with a Fe/Ni molar ratio of 1:4,which delivers low overpoten-tials of 278 and 279 mV for OER and HER at 10 mA cm-2 in 1.0 mol/L KOH,respectively.The intriguing electrocatalytic performance is mainly ascribed to the advantageous integration of rambutan-like hier-archically porous structure and composition optimization,significantly facilitating the fast mass/charge transfer as well as promoting the adsorption ability for intermediates.The present method may open a facile avenue for developing cost-effective,high-activity,and stable electrocatalysts for the application of overall water splitting.

ElectrocatalystsFeNi alloyCarbon nanotubesOxygen evolution reactionHydrogen evolution reaction

Yu Zhang、Boyuan Chen、Yanxin Qiao、Yurong Duan、Xinyu Qi、Siqi He、Hu Zhou、Junkang Chen、Aihua Yuan、Shunli Zheng

展开 >

School of Materials Science and Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

College & Hospital of Stomatology,Key Laboratory of Oral Diseases Research of Anhui Province,Anhui Medical University,Hefei 230032,China

College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China

Instrumental Analysis Center of Jiangsu University of Science and Technology,Zhenjiang 212003,China

School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China

展开 >

2024

10.1016/j.jmst.2024.03.046

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.201(34)