Key Words:EVOLUTION; NANOCRYSTALS
Abstract:Optimizing the electronic structure of Ru by introducing N dopants or O vacancies (VO) into RuO2 is expected to be a promising strategy to stimulate the hydrogen evolution reaction (HER) performance. However, it is a challenge to develop a fast and low-energy method to simultaneously achieve the construction of N dopants and VO. This work was the first to optimize the quenching technique for achieving the co-introduction of VO and N in Co-RuO2 nanosheets (N,Co-RuO2-VO). Related characterizations confirmed that VO and N dopants synergistically optimized the electronic configuration of Ru and the reaction path of alkaline HER. As expected, the mass activity of N,Co-RuO2-VO (2208.63 mA mg-Ru1) was 8.05-fold that of Pt/C at 100 mV for alkaline HER. Surprisingly, N,Co-RuO2-VO required only 148.6 mV to achieve an industrial-grade current density of 1 A cm-2, which was much lower than the commercial Pt/C catalyst (312 mV). Overall, this work provides an energy-efficient new strategy for the development of Ru-based catalysts with ampere-level currents.
Volume:485
Issue:
Translation or Not:no