In flow mode, TiO2|CotpyP produced syngas under irradiation and exhibited activities of 147.8 ± 96.8 nmol CO gTiO2 -1 min -1 and 367.1 ± 605.9 nmol H2 gTiO2 -1 min -1 (Table ). The generated solar syngas had thus a CO:H2 ratio of ~30:70. The activity of TiO2|CotpyP over time under flow conditions is significantly higher than other stateof-the-art photocatalytic flow systems (Table ), and therefore well suited for our biological-inorganic assembly.