Mg-Doping improves the performance of Ru-based electrocatalysts for the acidic oxygen evolution reaction

Magnesium doped ultra-fine RuO₂ nanoparticles are prepared by a one-step annealing of Ru-exchanged Mg-MOF-74. Mg-RuO₂ exhibits excellent oxygen evolution reaction performance with a low overpotential of 228 mV at 10 mA cm^-2. The excellent performance is attributed to the altered electronic structure and the optimized surface atomic arrangement.