Engineered V₂C MXene anchored Cu nanoparticles for selective nitrate/nitrite sensing and magneto-electrocatalytic...

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Developing integrated electrode materials for sensing and catalysis is crucial.
• Two-dimensional (2D) materials like V2CTx MXene offer unique properties for electrochemical applications.
• Copper nanoparticles enhance catalytic activity and charge transfer.

Purpose of the Study:

• To create and investigate a hybrid V2C@Cu MXene platform for combined sensing and catalytic functions.
• To explore the electrochemical and magneto-electrocatalytic properties of the V2C@Cu composite.
• To assess the material's performance in detecting environmental pollutants and catalyzing reactions.

Main Methods:

• Fabrication of a V2C@Cu composite using electrodeposition of copper nanoparticles onto delaminated V2CTx MXene.
• Electrochemical characterization including cyclic voltammetry and chronoamperometry for sensing applications.
• Electrocatalytic testing for the hydrogen evolution reaction under varying magnetic fields.
• Analysis of environmental water samples to validate practical applicability.

Main Results:

• The V2C@Cu composite achieved selective electrochemical detection of nitrate and nitrite with low detection limits.
• Demonstrated magneto-electrocatalytic activity for hydrogen evolution reaction, reducing overpotential and Tafel slope under magnetic fields.
• Exhibited excellent electrochemical stability during repeated cycling and extended operation.
• Successfully detected nitrate and nitrite in real environmental water samples with high recovery rates.

Conclusions:

• The V2C@Cu MXene composite is a promising versatile platform for integrated electrochemical sensing and magneto-electrocatalysis.
• This hybrid material shows significant potential for environmental monitoring and energy conversion applications.
• Further research into MXene-based composites could lead to advanced functional materials.