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Polyoxometalate-Derived Hexagonal Molybdenum Nitrides (MXenes) Supported by Boron, Nitrogen Codoped Carbon Nanotubes for Efficient Electrochemical Hydrogen Evolution from Seawater
Miao J.1; Lang Z.5; Zhang X.1; Kong W.1; Peng O.1; Yang Y.2; Wang S.2; Cheng J.7; He T.7; Amini A.3; Wu Q.6; Zheng Z.1; Tang Z.2; Cheng C.1
2019-02-21
Source PublicationAdvanced Functional Materials
ISSN16163028 1616301X
Volume29Issue:8
AbstractMXenes and doped carbon nanotubes (CNTs) have entered into research arenas for high-rate energy storage and conversion. Herein, a method of postsynthesis of MXenes in boron, nitrogen codoped CNTs (BNCNTs) is reported with their electrocatalytical hydrogen evolution performance. The encapsulation of hexagonal molybdenum nitrate nanoparticles (h-MoN NPs) into BNCNTs protects h-MoN NPs from agglomeration and poisoning in the complex environment. In principle, the synergism of B and N dopants on the doped CNTs and confined h-MoN NPs produces extremely active sites for electrochemical hydrogen evolution. Density functional theory calculations reveal that the active sites for hydrogen evolution originate from the synergistic effect of h-MoN(001)/CN (graphitic N doping) and h-MoN(001)/BNC. The h-MoN@BNCNT electrocatalyst exhibits a small overpotential of 78 mV at 10 mA cm and Tafel slope of 46 mV per decade, which are dramatically improved over all reported MoN-based materials and doped CNTs. Additionally, it also exhibits outstanding electrochemical stability in environments with various pH values and seawater media from South China Sea.
Keyworddensity functional theory calculations doped carbon nanotubes hydrogen evolution reaction MXenes polyoxometalate
DOI10.1002/adfm.201805893
URLView the original
Language英語
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Affiliation1.Southern University of Science and Technology
2.Universidade de Macau
3.Western Sydney University
4.University of Arizona
5.Northeast Normal University
6.Zhejiang University
7.Shenzhen University
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Miao J.,Lang Z.,Zhang X.,et al. Polyoxometalate-Derived Hexagonal Molybdenum Nitrides (MXenes) Supported by Boron, Nitrogen Codoped Carbon Nanotubes for Efficient Electrochemical Hydrogen Evolution from Seawater[J]. Advanced Functional Materials,2019,29(8).
APA Miao J..,Lang Z..,Zhang X..,Kong W..,Peng O..,...&Cheng C..(2019).Polyoxometalate-Derived Hexagonal Molybdenum Nitrides (MXenes) Supported by Boron, Nitrogen Codoped Carbon Nanotubes for Efficient Electrochemical Hydrogen Evolution from Seawater.Advanced Functional Materials,29(8).
MLA Miao J.,et al."Polyoxometalate-Derived Hexagonal Molybdenum Nitrides (MXenes) Supported by Boron, Nitrogen Codoped Carbon Nanotubes for Efficient Electrochemical Hydrogen Evolution from Seawater".Advanced Functional Materials 29.8(2019).
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