Low Ru doping induced interface and defects engineering in 2D square micro-mesoporous CoNiRuO_x nanosieves for...

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Efficient oxygen evolution reaction (OER) catalysts are crucial for energy conversion technologies.
• Integrating geometric architecture, defects, and electronic structure in low-cost catalysts remains challenging.

Purpose of the Study:

• To design and synthesize novel low Ru doping 2D square CoNiRuO_x nanosieves (NSs) for enhanced OER activity.
• To investigate the structure-property relationships and electron transfer mechanisms in the designed catalysts.

Main Methods:

• Synthesis of 2D CoNiRuO_x nanosieves with controlled porosity and defects.
• Electrochemical characterization including OER performance and durability testing.
• Investigation of electron transfer mechanisms using an "Ni-O-Co-O-Ru-O-Ni" model.

Main Results:

• The CoNiRuO_x NSs exhibited a low overpotential of 261 mV at 10 mA cm^-2 for OER.
• The catalyst demonstrated excellent durability over 50 hours.
• The CoNiRuO_x//Pt/C electrode couple showed enhanced overall water splitting performance.

Conclusions:

• The designed 2D CoNiRuO_x NSs offer a promising low-cost, high-performance catalyst for OER.
• The integration of porosity, defects, and heterophase interfaces is key to improving catalytic activity.
• This work provides insights for designing advanced 2D materials for robust electrocatalysis in energy conversion.