Boosting Acidic OER Performance Via Transition Metal Doping in Iridium/Ruthenium Oxides

Area of Science:

• Materials Science
• Electrochemistry
• Catalysis

Background:

• Developing efficient and stable acidic oxygen evolution reaction (OER) catalysts is vital for hydrogen production via water electrolysis.
• Commercial iridium oxide (IrO2) and ruthenium oxide (RuO2) catalysts are expensive and lack durability, necessitating cost-effective alternatives.

Purpose of the Study:

• To systematically investigate the enhancement of OER catalytic activity and stability in IrO2 and RuO2 through transition metal doping.
• To elucidate structure-activity relationships in transition metal-doped Ir/Ru oxides for acidic OER.

Main Methods:

• Exploration of transition metal doping strategies (3d, 4d, 5d, and multi-metal) on IrO2 and RuO2.
• Analysis of electronic structure modifications and d-band center optimization.

Main Results:

• Transition metal doping significantly improves the OER catalytic activity and stability of IrO2 and RuO2.
• Doping modifies electronic structures and optimizes d-band centers, correlating with enhanced performance.

Conclusions:

• Transition metal doping presents a viable strategy for developing high-performance, cost-effective, and stable acidic OER catalysts.
• Future research should focus on non-noble metal doping and atomic-level design for advanced electrocatalysts.