Single yttrium sites on carbon-coated TiO2 for efficient electrocatalytic N2 reduction.

We report single yttrium sites anchored on carbon-coated TiO2 for efficient and stable electrocatalytic N2 fixation, delivering an NH3 faradaic efficiency exceeding 11.0% and an NH3 yield rate as high as 6.3 µgNH3 h-1 mgcat.-1 at low overpotentials, thus surpassing many reported metal electrocatalysts.