A trace of Pt can significantly boost RuO2 for acidic water splitting

The development of highly potential electrocatalysts for acidic water electrolysis is particularly desirable many energy-related processes. Herein, we demonstrated a versatile strategy to activate and stabilize RuO2-based electrocatalyst splitting by trace Pt, where Pt plays an essential role in promoting oxygen evolution reaction (OER), can simultaneously act as the active site hydrogen (HER). Compared with pure Ru oxide nanosheet assemblies (Ru ONAs), “5%Pt-containing” ONAs (5%Pt-Ru ONAs) achieve much enhanced OER activity 0.5 0.05 mol/L H2SO4, lower overpotentials 227 234 mV at 10 mA cm?2, respectively. Experimental theoretical analyses reveal that atomically dispersed incorporating into RuO2 lattice conducive increasing concentration O vacancies, which effectively enhances interaction intermediate thus lowers energy barrier formation OOH*. Moreover, benefited from presence more achievable when proper annealing applied. In addition OER, due HER performance 5%Pt-Ru also be ensured, thereby realizing efficient overall splitting. Finally, excellent achieved without sacrificing stability. This work highlights attractive designing stable