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Full-Solution Processed Halide Perovskite Photoanodes with Carbon/NiFe-LDH Protection for Efficient
Carlos A Velásquez1, Juan J Patiño1, Kevin Ballestas1
1Centro de Investigación, Innovación y Desarrollo de Materiales (CIDEMAT), Departamento de Ingeniería de Materiales, Facultad de Ingeniería, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, 050010, Colombia.
Precious metal-free photoelectrodes using carbon-based perovskites and nickel-iron layered double hydroxide (NiFe-LDH) catalysts enable efficient and stable green hydrogen production. These low-cost systems show promising results for large-scale clean energy applications.
Area of Science:
- Materials Science
- Electrochemistry
- Renewable Energy
Background:
- Photoelectrochemical (PEC) water oxidation is crucial for green hydrogen production, a key component of the energy transition.
- There is a significant need for cost-effective, stable, and efficient electrodes and photoelectrodes that do not rely on precious metals.
- Developing scalable and affordable green hydrogen production systems is a major global challenge.
Purpose of the Study:
- To develop efficient, low-cost, and stable photoelectrodes for photoelectrochemical water oxidation using nonprecious catalysts.
- To investigate the performance of carbon-based hybrid perovskite photoelectrodes coupled with earth-abundant Nickel-Iron layered double hydroxide (NiFe-LDH) catalysts for oxygen evolution reaction (OER).
- To enhance the stability and efficiency of these photoelectrode systems for practical applications.
Main Methods:
- Fabrication of carbon-based hybrid perovskite photoelectrodes integrated with NiFe-LDH catalysts.
- Evaluation of the photoelectrodes for oxygen evolution reaction (OER) performance.
- Incorporation of graphite tape to improve system stability and efficiency.
Main Results:
- The carbon/NiFe-LDH photoelectrodes demonstrated over 12 hours of continuous operation, achieving a 4.57% applied bias photon-to-current efficiency (ABPE) at 0.64 VRHE and a photocurrent density of 11.71 mA cm-2 at 1.23 VRHE.
- The enhanced C/GT/NiFe-LDH system exhibited exceptional operational stability exceeding 125 hours.
- The C/GT/NiFe-LDH system achieved a high photocurrent density of 18.07 mA cm-2 at 1.23 VRHE and an 8.51% ABPE at 0.67 VRHE.
Conclusions:
- Carbon-based hybrid perovskite photoelectrodes coupled with NiFe-LDH catalysts offer a promising pathway towards efficient and stable precious metal-free PEC water oxidation.
- The integration of graphite tape significantly enhances the operational stability and performance of these photoelectrode systems.
- These findings contribute to the development of low-cost, large-scale green hydrogen production technologies.
