Finding the Sweet Spot of Photocatalysis-A Case Study Using Bipyridine-Based CTFs

Fávaro MA, Ditz D, Yang J, Bergwinkl S, Ghosh AC, Stammler MB, Lorentz C, Roeser J, Quadrelli EA, Thomas A, Palkovits R, Canivet J, Wisser FM (2022)

Publication Type: Journal article

Publication year: 2022


Book Volume: 14

Pages Range: 14182-14192

Journal Issue: 12

DOI: 10.1021/acsami.1c24713


Covalent triazine frameworks (CTFs) are a class of porous organic polymers that continuously attract growing interest because of their outstanding chemical and physical properties. However, the control of extended porous organic framework structures at the molecular scale for a precise adjustment of their properties has hardly been achieved so far. Here, we present a series of bipyridine-based CTFs synthesized through polycondensation, in which the sequence of specific building blocks is well controlled. The reported synthetic strategy allows us to tailor the physicochemical features of the CTF materials, including the nitrogen content, the apparent specific surface area, and optoelectronic properties. Based on a comprehensive analytical investigation, we demonstrate a direct correlation of the CTF bipyridine content with the material features such as the specific surface area, band gap, charge separation, and surface wettability with water. The entirety of these parameters dictates the catalytic activity as demonstrated for the photocatalytic hydrogen evolution reaction (HER). The material with the optimal balance between optoelectronic properties and highest hydrophilicity enables HER production rates of up to 7.2 mmol/(h·g) under visible light irradiation and in the presence of a platinum cocatalyst.

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Fávaro, M.A., Ditz, D., Yang, J., Bergwinkl, S., Ghosh, A.C., Stammler, M.B.,... Wisser, F.M. (2022). Finding the Sweet Spot of Photocatalysis-A Case Study Using Bipyridine-Based CTFs. ACS Applied Materials and Interfaces, 14(12), 14182-14192.


Fávaro, Marcelo Alves, et al. "Finding the Sweet Spot of Photocatalysis-A Case Study Using Bipyridine-Based CTFs." ACS Applied Materials and Interfaces 14.12 (2022): 14182-14192.

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