Electrocatalytic H2O2 production via two-electron O2 reduction by Mo-doped TiO2 nanocrystallines

Electrochemical synthesis of H(2)O(2)via a selective two-electron O-2 reduction reaction (2e(-) ORR) is an attractive alternative to the industrial anthraquinone oxidation method. Herein, Mo doping is proposed as an effective strategy to boost 2e(-) ORR of the TiO2 nanocrystallines, which not only improves the electrical conductivity of TiO2 but also reduces the *OOH adsorption energy of active sites. Such Mo-TiO2-2 achieves a high Faradaic efficiency of 92% and a large H2O2 yield of 395.3 mmol g(cat)(-1) h(-1) in 0.1 M KOH. The catalytic mechanism is further revealed via density functional theory calculations.