Engineering sinter-resistant pyrochlore nanofibers with triple-phase boundaries for acidic oxygen evolution.

Area of Science:

• Materials Science
• Nanotechnology
• Catalysis

Background:

• Sintering of catalysts leads to reduced surface area and activity.
• Efficient mass transfer is crucial for optimizing catalytic reactions.
• Developing advanced catalysts for energy applications requires novel synthesis strategies.

Purpose of the Study:

• To develop a multiscale electrospinning strategy for synthesizing Tb₂Ru₂O₇ nanofibers.
• To investigate the role of structural features (spatial confinement, hierarchical pores) in catalyst performance.
• To optimize precursor selection for enhanced bubble desorption and catalytic efficiency.

Main Methods:

• Multiscale electrospinning of terbium ruthenium oxide (Tb₂Ru₂O₇).
• Structural characterization to analyze nanofiber morphology and porosity.
• Electrochemical testing to evaluate catalytic performance and overpotential.

Main Results:

• Nanofibers effectively suppressed sintering through spatial confinement.
• Hierarchical pores enhanced mass transfer and bubble desorption.
• The synthesized Tb₂Ru₂O₇ nanofibers achieved a high performance of 10 mA cm^-2 at 246 mV overpotential.

Conclusions:

• Multiscale electrospinning is a viable strategy for creating high-performance Tb₂Ru₂O₇ catalysts.
• Nanofiber architecture with controlled porosity significantly improves catalytic efficiency.
• The developed catalyst shows promise for advanced energy applications requiring efficient electrocatalysis.