Construction of trifunctional electrode material based on Pt-Coordinated Ce-Based metal organic framework

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Platinum nanoparticles (Pt NPs) are crucial for electrochemical applications but suffer from high costs and agglomeration issues.
• Developing cost-effective and stable electrode materials is essential for advancing electrochemical technologies.

Purpose of the Study:

• To construct a novel trifunctional electrode material using a two-dimensional cerium-based metal-organic framework (2D Ce-MOF) decorated with Pt NPs.
• To investigate the synergistic effects of Pt NPs and 2D Ce-MOF on electrochemical performance.
• To explore the potential of this composite material for hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and supercapacitor applications.

Main Methods:

• Synthesis of a 2D Ce-MOF structure.
• Decoration of the 2D Ce-MOF with Pt NPs to form the Ce-MOF@Pt composite.
• Electrochemical characterization including cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy.
• Evaluation of HER and OER activity using Tafel slope analysis.
• Assessment of supercapacitor performance, including specific capacitance and cycling stability.

Main Results:

• The 2D Ce-MOF effectively prevented Pt NP agglomeration due to its large specific surface area.
• The synergistic interaction between Pt NPs and 2D Ce-MOF enhanced electron transport and increased active reaction sites.
• Ce-MOF@Pt demonstrated excellent performance in HER (Tafel slope: 188.1 mV dec⁻¹) and OER (Tafel slope: 47.9 mV dec⁻¹).
• The Ce-MOF@Pt-0.05 composite exhibited a high specific capacitance of 1894 F g⁻¹ at 1 A g⁻¹ and retained 111.5% of its initial capacitance after 3000 cycles.

Conclusions:

• The developed Ce-MOF@Pt composite material offers a promising strategy to improve electrochemical performance.
• This approach highlights the role of Pt NPs in enhancing MOF-based electrocatalysts and provides a cost-effective alternative for electrochemical applications.
• The trifunctional nature of the material makes it suitable for diverse energy storage and conversion systems.