Highly Efficient Peroxymonosulfate Activation on Electron-Enriched Ruthenium Dual-Atom Sites Catalysts for Enhanced Water Purification

Abstract

By rationally adjusting the coordination environment and constructing the more electron-enriched active site in single-atom catalysts, the effect of heterogenous peroxymonosulfate (PMS)-based Fenton-like reactions can be effectively improved, yet remains a severe challenge. In this study, the electron-rich Ru dual-atom site is successfully immobilized onto N-doped carbon (Ru2N6-C) for PMS activation in water purification. The presence of electron-rich Ru dual-atom sites not only provides more electrons for PMS but also facilitates the formation of a Yeager adsorption configuration on the catalyst surface, which enhances O─O bond cleavage and leads to an increase in •SO4− and •OH generation. Moreover, the Ru2N6-C catalyst exhibits exceptional durability and reliability, achieving an ultra-high efficiency with a turnover frequency of 153.95 min−1 M−1 for the naproxen degradation. A membrane reactor is further developed for the purification of wastewater, which is expected to provide a viable approach to controlling water pollution through the design of metal dual-atom sites carbon-based catalysts.