Experimental and first-principles insights into an enhanced performance of Ru-doped copper phosphate electrocatalyst during oxygen evolution reaction

• DOI: 10.1016/j.sajce.2024.03.006
• Publication Date: 2024-03-12T02:10:13Z
• Authors: Jasmin S. Shaikh; Meena Rittiruam; Tinnakorn Saelee; Victor Márquez; Navajsharif S. Sh...; Patcharaporn Khaj...; Sumayya C. Pathan; Mohammad Khaja Na...; Piyasan Praserthdam; Supareak Praserthdam
• Keywords: Overpotential; Oxygen evolution

The oxygen evolution reaction (OER) is a vital half-reaction in many applications, such as the electrochemical H2O splitting, CO2, and N2 conversion processes. OER involves four-electron transfer kinetically sluggish that requires additional potential to drive. To enhance performance of above-mentioned highly efficient, corrosion-resistant, earth-abundant, eco-friendly electrocatalysts are required. Here, we report porous, minimally Ru-doped copper phosphate electrocatalyst obtained through co-precipitation. optimized (5% phosphate) exhibits low overpotential 340 mV achieve 10 mA cm−2 compared copper-based materials, it remains stable over 20 hours. high attributed electrochemically effective surface area (ECSA) 30.25 cm2, facilitating ion transportation at electrode/electrolyte interface excellent electrical conductivity. This result supported by density functional theory calculations, which demonstrate ruthenium enhances properties increasing electronic conductivity, reducing theoretical overpotential, influencing rate-determining step reaction. Herein, attractive for commercialization due its utilization minimal earth-abundant electrocatalysts, offer competitive performance.