Cobalt-Vanadium Hydroxide Nanoneedles with a Free-Standing Structure as High-Performance Oxygen Evolution Reaction Electrocatalysts

Yang, Mingyang1,2; Fu, Xuelian1,3; Shao, Mengmeng2; Wang, Zhenyu1; Cao, Lujie1,2; Gu, Shuai1; Li, Minchan1; Cheng, Hua1; Li, Yuchao3; Pan, Hui2; Lu, Zhouguang1

2019-04

10.1002/celc.201900415

ChemElectroChem   影响因子和分区

2196-0216

It is a great challenge to develop electrocatalysts with high efficiency and low cost toward oxygen evolution reaction (OER) for the electrolysis of water. Herein, novel CoV-hydroxide nanoneedle arrays with freestanding structure is successfully fabricated as new electrocatalysts for OER. Remarkably, the incorporation of V into Co hydroxide can significantly modulate the nanoneedle morphology, which results in the increase of active surface area, and augment the intrinsic activity by tuning the electronic structure. Particularly, we find that the freestanding Co hydroxide nanoneedles with 25 % Co substituted by V (Co0.75V0.25-HNNs) show the optimum OER catalytic activity and have a low overpotential (268 mV at 10 mA cm(-2)), a small Tafel slope (80 mV dec(-1)) and long-term stability, which are comparable to the other Co-based and V-based electrocatalysts for OER reported in literature.

CoV hydroxide nanoneedles electrocatalysts freestanding structures V incorporation oxygen evolution reaction

SCI ; EI

英语

第一 ; 通讯

Multi-Year Research Grants from Research & Development Office at University of Macau[MYRG2015-00017-FST]

Electrochemistry

Electrochemistry

WOS:000466798700013

WILEY-V C H VERLAG GMBH

20191606804626

Catalyst activity ; Cobalt alloys ; Electrocatalysts ; Electrolysis ; Electronic structure ; Morphology ; Nanoneedles ; Oxygen ; Slope stability ; Vanadium compounds

Roads and Streets:406.2 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Nanotechnology:761 ; Electrochemistry:801.4.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Solid State Physics:933 ; Materials Science:951

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Univ Macau, Joint Key Lab, Inst Appl Phys & Mat Engn, Minist Educ, Macau, Peoples R China
3.Liaocheng Univ, Sch Mat Sci & Engn, Liaocheng, Shandong, Peoples R China

Yang, Mingyang,Fu, Xuelian,Shao, Mengmeng,et al. Cobalt-Vanadium Hydroxide Nanoneedles with a Free-Standing Structure as High-Performance Oxygen Evolution Reaction Electrocatalysts[J]. ChemElectroChem,2019,6(7):2050-2055.

Yang, Mingyang.,Fu, Xuelian.,Shao, Mengmeng.,Wang, Zhenyu.,Cao, Lujie.,...&Lu, Zhouguang.(2019).Cobalt-Vanadium Hydroxide Nanoneedles with a Free-Standing Structure as High-Performance Oxygen Evolution Reaction Electrocatalysts.ChemElectroChem,6(7),2050-2055.

Yang, Mingyang,et al."Cobalt-Vanadium Hydroxide Nanoneedles with a Free-Standing Structure as High-Performance Oxygen Evolution Reaction Electrocatalysts".ChemElectroChem 6.7(2019):2050-2055.