Quantum dynamics calculation, performed on top of density functional theory (DFT)-based total energy calculations, show dynamical quantum filtering via enhanced scattering of para-H₂ on SrTiO₃(001). We attribute this to the strongly orientation-dependent (electrostatic) interaction potential between the H₂ (induced) quadrupole moment and the surface electric field gradient of ionic SrTiO₃(001). These results suggest that ionic surfaces could function as a scattering/filtering media to realize rotationally state-resolved H₂. This could find significant applications not only in H₂ storage and transport, but also in realizing materials with pre-determined characteristic properties.