Molybdenum-doped titanium dioxide supported low-Pt electrocatalyst for highly efficient and stable hydrogen evolution reaction

The strong metal-support interaction between Pt and Ti 0.9 Mo 0.1 O 2 regulated the electronic structure of Pt and the hydrogen spillover effect accelerated the hydrogen evolution process, resulting in excellent catalytic activity and stability. The Platinum (Pt)-based catalysts exhibit excellent catalytic performance for the hydrogen evolution reaction (HER) while suffering from poor stability due to the weak interaction between the carbon support and Pt. Herein, a molybdenum-doped titanium dioxide (Ti 0.9 Mo 0.1 O 2 ) supported low-Pt electrocatalyst with stronger interaction between catalyst and support is applied to tune the electrocatalytic performance of Pt. The Ti 0.9 Mo 0.1 O 2 support can not only tolerate the corrosion environment in the catalytic system, but also generate strong metal-support interaction (SMSI) between the oxide and catalyst. A facile solvothermal method is used to prepare Ti 0.9 Mo 0.1 O 2 as support to anchor Pt nanoparticles. The 5% Pt supported on Ti 0.9 Mo 0.1 O 2 catalyst exhibits 4.4-fold mass activity (MA) at an overpotential of 50 mV and higher stability than 20% Pt/C with only 1/4 Pt loading. The SMSI between the Ti 0.9 Mo 0.1 O 2 and Pt prevents the Pt aggregation to achieve excellent stability, and hydrogen spillover effect in the interface between Pt and support benefits the hydrogen production process. This work presents a novel sight for the fabrication and design of oxide supported catalysts in various catalytic system by reasonably employing support effect.