Low-content Ru-Pt supported on oxygen vacancy enriched black TiO₂ with strong electronic interactions as efficient hydrogen generation electrocatalysts

Release time:2024-12-24 Hits:

Key Words:EVOLUTION REACTION; CO OXIDATION; ANATASE TIO2; WATER; NANOPARTICLES; PERFORMANCE; REDUCTION; GRAPHENE; DENSITY; RUTILE

Abstract:Vacancy-engineered titanium dioxide (TiO2) loaded with low content noble metals is an important approach to achieve satisfactory hydrogen evolution reaction (HER) performance, but synthetic avenues are generally energy-intensive and tedious. Herein, a simple and ultrafast (60 s) microwave quasi-solid strategy is developed to prepare oxygen vacancy-enriched TiO2 doped with phosphorus to support low-loading Ru and Pt (Ru-Pt/P-TiO2-x) for the HER. The generated oxygen vacancies and introduced phosphorus favor a decrease in electrical resistance and enhance the metal-support interactions. Then, the as-developed Ru-Pt/P-TiO2-x exhibits satisfactory catalytic performance with an overpotential of 14 mV at 10 mA cm(-2) and a small Tafel slope of 28 mV dec(-1). In addition, the mass activity of Ru-Pt/P-TiO2-x is ten times or even hundred times higher than those of Ru/C and Pt/C. This study offers a novel and general approach to synthesize Ti-based compounds in renewable energy-related fields.

Volume:11

Issue:17

Translation or Not:no