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Methanol electro oxidation on Ni-Pt-CrO/CNFs composite: morphology, structural, and electrochemical characterization
E E Abdel-Hady1, Ahmed Gamal2, Hany Hamdy2
1Physics Department, Faculty of Science, Minia University, P.O. Box 61519, Minia, Egypt. esamhady@mu.edu.eg.
Scientific Reports
|March 25, 2023
Summary
This study developed a novel Ni-Pt-Cr electrocatalyst on carbon nanofibers for methanol electrooxidation. Adding chromium enhanced electrode stability and activation energy, showing promising catalytic performance.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Developing efficient electrocatalysts is crucial for direct methanol fuel cells.
- Carbon nanofibers offer a high surface area support for nanoparticle catalysts.
- Tuning alloy composition impacts catalytic activity and stability.
Purpose of the Study:
- To synthesize and characterize Ni-Cr-Pt nanoparticles on carbon nanofibers.
- To evaluate the methanol electrocatalytic performance of the synthesized materials.
- To investigate the effect of chromium addition on catalyst stability and activity.
Main Methods:
- Electrospinning of carbon nanofibers followed by high-temperature carbonization.
- Synthesis and loading of Ni-Cr-Pt nanoparticles onto carbon nanofibers.
- Electrochemical characterization using cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy.
Main Results:
- Carbon nanofibers with diameters of 250-520 nm were successfully produced.
- Chromium addition to Ni-Pt nanoparticles increased electrode stability and activation energy.
- The Ni-Pt-Cr catalyst (sample C3) achieved a maximum current density of 170.3 mA/cm² at 0.8 V.
Conclusions:
- A novel and powerful Ni-Pt-Cr-based methanol electrooxidation catalyst was fabricated.
- The electrooxidation of methanol using these catalysts is controlled by a mix of kinetic and diffusion limitations.
- The developed electrocatalyst demonstrates significant potential for methanol electrooxidation applications.
