Release time:2023-10-19  Hits:

• Key Words:DOPED GRAPHENE; OXYGEN; NANOCLUSTERS; NANOCRYSTALS; NANOSPHERES; PERFORMANCE; NANOSHEETS; NANOTUBES; RICH
• Abstract:Tailoring the interaction between metal nanoparticles and the support is of great significance in the development of efficient and economical non-platinum catalysts for the electrocatalytic hydrogen evolution reaction (HER). In this study, we report ruthenium (Ru) nanoparticles uniformly dispersed on N, C modified mesoporous TiO2 (N-TiO2/C) composites with enhanced interfacial interaction for the electrocatalytic HER. The N, C modified TiO2 can make Ru easier to be oxidized compared to non-modified TiO2. Consequently, the interaction can be tailored through the electron transfer from Ru to N, C modified mesoporous TiO2. The obtained Ru@N-TiO2/C catalysts exhibit excellent HER performance over a wide pH range, especially in 1 M KOH with a low overpotential of 39 mV @ 10 mA cm(-2) and Tafel slope of 47 mV dec(-1) even surpassing that of Pt/C. Meanwhile, the Ru@N-TiO2/C catalysts also possess low overpotentials of only 82 mV and 116 mV to drive a current density of 10 mA cm(-2) in 1.0 M PBS and 0.5 M H2SO4, which are comparable to that of Pt/C. This work provides a new perspective for tailoring the interaction between the metal and support for enhancing electro-catalytic properties.
• Volume:10
• Issue:44
• Translation or Not:no