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Elevating Oxygen Evolution using Iron Phthalocyanine Infused Vanillic acid Electrocatalyst.
Gouthami Patil1, Shantharaja Daniel1, Lokesh Koodlur Sannegowda1
1Department of Studies in Chemistry, Vijayanagara Sri Krishnadevaraya University, Vinayakanagara, 583105, Ballari, Karnataka, India.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|July 8, 2024
Summary
A novel iron phthalocyanine catalyst (FeVAPc) shows excellent performance for the oxygen evolution reaction (OER), a key step in water splitting for clean energy. This cost-effective catalyst offers high stability and efficiency for industrial applications.
Area of Science:
- Electrochemistry
- Materials Science
- Renewable Energy
Background:
- Oxygen evolution reaction (OER) is critical for hydrogen production via water splitting but remains a bottleneck.
- Transition metal-based N4 organics offer promising, cost-effective alternatives to precious metal catalysts for OER.
- Iron phthalocyanine derivatives are explored for their catalytic properties and stability.
Purpose of the Study:
- To synthesize and characterize a vanillic acid functionalized iron phthalocyanine (FeVAPc) for OER.
- To evaluate the electrocatalytic activity and stability of FeVAPc coated on nickel foam.
- To assess the potential of FeVAPc as a cost-effective catalyst for industrial OER applications.
Main Methods:
- Synthesis and spectroscopic characterization of vanillic acid functionalized iron phthalocyanine (FeVAPc).
- Coating FeVAPc onto nickel foam for electrochemical studies.
- Electrocatalytic testing for OER using techniques like cyclic voltammetry and chronoamperometry.
- Surface morphology analysis using scanning electron microscopy (SEM) and elemental analysis using X-ray photoelectron spectroscopy (XPS).
Main Results:
- FeVAPc exhibited good thermal stability and a network-like surface morphology.
- The catalyst demonstrated excellent OER activity with an overpotential of 312 mV at 10 mA/cm² in 1.0 M KOH.
- Ni/FeVAPc showed a lower Tafel slope compared to benchmark IrO₂, indicating efficient kinetics.
- The integrated catalyst displayed enhanced mass activity, reduced charge transfer resistance, and high active surface area.
Conclusions:
- Vanillic acid functionalized iron phthalocyanine (FeVAPc) is a highly efficient and stable electrocatalyst for OER.
- The Ni/FeVAPc composite offers a cost-effective and robust alternative to precious metal catalysts for water splitting.
- This organic-based catalyst shows significant potential for industrial applications in clean energy production.
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