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Constructing interface engineering and tailoring a nanoflower-like FeP/CoP heterostructure for enhanced oxygen
Linhua Wang1, Hua Yang1, Lulan Wang1
1Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University 252059 Liaocheng P. R. China.
RSC Advances
|May 18, 2023
Summary
Researchers developed a cost-effective cobalt-iron phosphide catalyst for efficient oxygen evolution reaction (OER) in water splitting. This advanced electrocatalyst offers a promising solution to the energy crisis.
Area of Science:
- Materials Science
- Electrochemistry
- Renewable Energy
Background:
- Developing efficient electrocatalysts is crucial for water splitting electrolysis to address the energy crisis.
- Oxygen evolution reaction (OER) is a key bottleneck in water splitting, requiring low-cost and highly active catalysts.
Purpose of the Study:
- To synthesize a high-yield, structurally regulated bimetallic cobalt-iron phosphide electrocatalyst for efficient OER.
- To investigate the effect of nanoscale morphology on OER performance.
Main Methods:
- A facile one-pot hydrothermal reaction followed by low-temperature phosphating treatment.
- Tailoring nanoscale morphology by adjusting input ratios and phosphating temperatures.
- Characterization of the optimized FeP/CoP-1-350 sample with ultra-thin nanosheets assembled into a nanoflower-like structure.
Main Results:
- The optimized FeP/CoP-1-350 heterostructure exhibited remarkable OER activity.
- Achieved a low overpotential of 276 mV at 10 mA cm⁻² and a low Tafel slope of 37.71 mV dec⁻¹.
- Demonstrated long-lasting durability and stability during the OER process.
Conclusions:
- The enhanced OER activity is attributed to abundant active sites, the CoP/FeP interface, and synergistic Fe-Co effects.
- This study presents a viable strategy for fabricating efficient and cost-effective bimetallic phosphide electrocatalysts.
- The developed catalyst shows significant potential for practical applications in water splitting electrolysis.
