The impeding effect of dissolved oxygen on the photocatalytic reduction of [PdCln(H2O)4−n]2−n (n = 0-4) complexes employing different TiO2 photocatalysts in the absence of an added sacrificial reducing agent

- [PdCl4]2− is successfully reduced in the absence of a sacrificial reducing agent.
- Only rutile reduces [PdCl4]2− in the presence and absence of dissolved O2 (from air).
- Oxygen impedes the photocatalytic reduction of Pd(II)-chloride complexes.