A highly efficient covalent organic framework film photocatalyst for selective solar fuel production from CO₂

Abstract

The successful development of a triazine based covalent organic framework as an inexpensive and highly efficient visible light active flexible film photocatalyst for solar fuel production from CO2is described.

Evolution of the formation of a covalent triazine-based framework catalyzed by p-toluenesulfonic acid monohydrate

“…It is worth mentioning that for CTF-1@500, the peaks attributed to the nitrile groups were still detected by XPS (400.2 eV in N 1s, Fig. S3k †) and 13 C-solid NMR spectrum (116 ppm, Fig. S1 †), which may be related to the dynamically reversible trimerization of nitriles; 34 the catalyst plays a vital role in this process.…”

“…X-ray photoelectron spectroscopy (XPS) measurements were performed using an ESCALAB250XI instrument. 13 C-solid-state nuclear magnetic resonance ( 13 C-solid NMR) spectra were obtained using a Bruker Avance 400 MHz spectrometer. Powder Xray diffractograms (PXRD) were obtained in the reection mode using a Rigaku D/max 2500 powder X-ray diffractometer with Cu-K a radiation (l ¼ 1.4518Å).…”

“…2g) were in agreement with the FTIR results. 4 In addition, the peak at 169.8 ppm in the 13 C solid NMR of CTF-1@500 (Fig. S1 †), attributing to the triazine structure, further veried the existence of triazine structure in CTF-1@500.…”

Product Selectivity in Homogeneous Artificial Photosynthesis Using [(bpy)Rh(Cp*)X]n+-Based Catalysts

“…Interestingly, simple control experiments almost always reveal that the highly effective substrate conversion is only possible in the presence of the enzyme. This indicates that the catalytically active [(NN)Rh(Cp*)H] + species exhibits high chemoselectivity for NAD(P)H generation over ketone [93,94] or CO2 [95,97,104,106] reduction under the applied conditions, although the latter substrates are added in high excess. In terms of enzymatic stereoselective alcohol formation, this chemoselectivity is highly beneficial, as shown in Figure 14.…”

“…A broad variety of photosensitizers have been applied in these systems, ranging from small organic dyes [85,[89][90][91] to functionalized graphenes [92][93][94][95], photoredoxactive polymers [96,97], red light absorbing tin porphyrines from Knör and coworkers [98], ruthenium polypyridine complexes [32,97,99], and different solid photoactive materials [100][101][102][103][104][105][106][107][108][109][110].…”