Matteo Fratarcangeli

Widespread citation manipulation has led entire field of math to be excluded from influential list of top researchers

The asymmetric Ru−O−In active structure exhibits impressive electrocatalytic performance for acid oxygen evolution reaction, which is significantly enhanced by the contracted Ru−O bond compared to RuO₂.

Abstract

Proton exchange membrane water electrolysis is a highly promising hydrogen production technique for sustainable energy supply, however, achieving a highly active and durable catalyst for acidic water oxidation still remains a formidable challenge. Herein, we propose a local microenvironment regulation strategy for precisely tuning In−RuO₂/graphene (In−RuO₂/G) catalyst with intrinsic electrochemical activity and stability to boost acidic water oxidation. The In−RuO₂/G displays robust acid oxygen evolution reaction performance with a mass activity of 671 A g_cat ⁻¹ at 1.5 V, an overpotential of 187 mV at 10 mA cm⁻², and long-lasting stability of 350 h at 100 mA cm⁻², which arises from the asymmetric Ru−O−In local structure interactions. Further, it is unraveled theoretically that the asymmetric Ru−O−In structure breaks the thermodynamic activity limit of the traditional adsorption evolution mechanism which significantly weakens the formation energy barrier of OOH*, thus inducing a new rate-determining step of OH* absorption. Therefore, this strategy showcases the immense potential for constructing high-performance acidic catalysts for water electrolyzers.