Rapid complete reconfiguration induced actual active species for industrial hydrogen evolution reaction

Rapid complete reconfiguration induced actual active species for industrial hydrogen evolution reaction

Abstract Rational regulation of electrochemical reconfiguration and exploration of activity origin are important foundations for realizing the optimization of electrocatalyst activity, but rather challenging. Herein, we potentially develop a rapid complete reconfiguration strategy for the heterostru...

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Bibliographic Details
Published in:Nature communications 2022-10, Vol.13 (1), p.5785-5785, Article 5785
Main Authors: Wang, Luqi, Hao, Yixin, Deng, Liming, Hu, Feng, Zhao, Sheng, Li, Linlin, Peng, Shengjie
Format: Article
Language:eng
Subjects:
Aqueous solutions
Catalysts
Charge transfer
Cobalt oxalates
Electrocatalysts
Electrochemistry
Electrolytes
Energy
Evolution
Free energy
Heterostructures
Hydrogen
Hydrogen evolution reactions
Optimization
Reconfiguration
Seawater
Self-assembly
Species
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Summary:Abstract Rational regulation of electrochemical reconfiguration and exploration of activity origin are important foundations for realizing the optimization of electrocatalyst activity, but rather challenging. Herein, we potentially develop a rapid complete reconfiguration strategy for the heterostructures of CoC 2 O 4 coated by MXene nanosheets (CoC 2 O 4 @MXene) during the hydrogen evolution reaction (HER) process. The self-assembled CoC 2 O 4 @MXene nanotubular structure has high electronic accessibility and abundant electrolyte diffusion channels, which favor the rapid complete reconfiguration. Such rapid reconfiguration creates new actual catalytic active species of Co(OH) 2 transformed from CoC 2 O 4 , which is coupled with MXene to facilitate charge transfer and decrease the free energy of the Volmer step toward fast HER kinetics. The reconfigured components require low overpotentials of 28 and 216 mV at 10 and 1000 mA cm −2 in alkaline conditions and decent activity and stability in natural seawater. This work gives new insights for understanding the actual active species formation during HER and opens up a new way toward high-performance electrocatalysts.
ISSN:2041-1723
2041-1723