A Binary Metal‐Organic Framework Heterojunction Electrocatalyst (Ru‐Ru 2 P@MOF) for Overall Water‐Splitting

ABSTRACT The utilization of electrocatalysts in water‐splitting reactions holds significant promise for the development of sustainable energy systems, addressing the global demand for renewable energy sources. The present work on Ruthenium‐Diruthenium Phosphide (Ru‐Ru 2 P) nanoparticle‐loaded metal‐organic framework (MOF) heterojunction electrocatalyst (Ru‐Ru 2 P@MOF) explores the novel approach to creating heterojunction electrocatalysts for tackling the challenges associated with the kinetic barrier at alkaline conditions for water‐splitting reactions (WSR). MOFs are promising materials for electrocatalytic applications due to their inherent porosities, high surface area, tunable functionality, and presence of organic and inorganic moieties in their highly stable framework structure. Integration of Ru‐Ru 2 P nanoparticles into MOF enhanced the reaction kinetics for H 2 and O 2 generation with efficient charge generation and separation and improved the catalytic activity. The MOF‐based heterojunction electrocatalyst executed excellent electrocatalytic activity for WSR at very low overpotentials of 250 mV for HER and 30 mV for OER at a benchmark current density of 10 mA/cm 2 . The synergistic effect between NH 2 ‐UiO‐66 MOF and Ru‐Ru 2 P nanoparticles boosts electrocatalytic water splitting by combining the high surface area and porosity of the MOF with the excellent catalytic activity and conductivity of the Ru‐Ru 2 P nanoparticles, with implications for renewable energy and environmental sustainability. The underlying mechanism of electrocatalytic water‐splitting reactions has been studied.