Composite Nanoarchitectonics of Co3O4 Nanopolyhedrons with N-Doped Carbon and Carbon Nanotubes for Alkaline Oxygen Evolution Reaction

Electrochemical water splitting is deemed to be an environmentally friendly methodology for hydrogen and oxygen in various electrochemical systems. The electrocatalyst has a strong relationship with the performance of the oxygen evolution reaction (OER). Herein, Co 3 O 4 nanopolyhedrons (Co 3 O 4 NP...

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Bibliographic Details
Published in:Catalysis letters 2024-07, Vol.154 (7), p.3999-4008
Main Authors: Yang, Haidong, Liu, Nuo, Chang, Shan, Zhao, Yuee, Liu, Yang
Format: Article
Language:English
Subjects:
adsorption
Carbon
Carbon nanotubes
Catalysis
Catalysts
Chemistry
Chemistry and Materials Science
cobalt oxide
Cobalt oxides
desorption
Electrocatalysts
electrochemistry
Electron transfer
hydrogen
Industrial Chemistry/Chemical Engineering
Organometallic Chemistry
oxygen
Oxygen evolution reactions
oxygen production
Physical Chemistry
Polyhedra
porous media
Pyrolysis
temperature
Water splitting
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Summary:Electrochemical water splitting is deemed to be an environmentally friendly methodology for hydrogen and oxygen in various electrochemical systems. The electrocatalyst has a strong relationship with the performance of the oxygen evolution reaction (OER). Herein, Co 3 O 4 nanopolyhedrons (Co 3 O 4 NPs) and Co 3 O 4 nanopolyhedrons with N-doped carbon (Co 3 O 4 NPs-NC) were obtained by changing the pyrolysis temperature using ZIF-67 as the precursor template. Due to the poor conductivity of cobalt-based oxides, the introduction of carbon nanotubes (CNTs) significantly increased the electron transfer rate of the Co 3 O 4 polyhedron, the Co 3 O 4 NPs-NC/CNTs exhibited outstanding activity as a catalyst in OER. The reason for the favorable catalytic capability of this catalyst is that the Co 3 O 4 NPs-NC with dodecahedral structure can supply abundant active sites, and its plentiful mesoporous structure can facilitate the adsorption of reactants and desorption of products. Therefore, the Co 3 O 4 NPs-NC/CNTs composite with excellent electrochemical activity has broad application prospects as a promising catalyst. Graphical Abstract The excellent OER performance of Co 3 O 4 NPs-NC/CNTs is attributed to having a polyhedral structure that replicates the ZIF-67 morphology and its rich mesoporous structure, which can provide more effective active sites.
ISSN:1011-372X
1572-879X
DOI:10.1007/s10562-024-04615-z