Stable Complete Water Splitting by Covalent Triazine‐based Framework CTF‐0

D. K and J. T thank the financial support from UK EPSRC (EP/N009533/1), Royal Society‐Newton Advanced Fellowship grant (NA170422) and the Leverhulme Trust (RPG‐2017‐122). D. K is also grateful for financial support by the UCL Engineering Dean's Prize and the Chinese Scholarship Council (CSC) for a PhD studentship. Organic photocatalyst: The photocatalytic one‐step overall water splitting over a single CTF‐0 polymer photocatalyst has been achieved by loading both Pt and Co3O4 as reduction and oxidation cocatalysts, which not only accelerate the transfer of photogenerated charge carriers but also offer more active sites for the overall water splitting by CTF‐0.