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Thienothiophene and triphenylbenzene based electroactive conjugated porous polymer for oxygen reduction reaction (ORR)

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Isci, Recep
Sutay, Berkay
Eroglu, Mehmet S.
Ozturk, Turan

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Catalysts based on metal-free conjugated porous polymers (CPPs) are still rare for electrochemical oxygen reduction reactions (ORR). In this study, a conjugated porous polymer, TT-TPB, based on thieno[3,2-b]thiophene (TT) and triphenylbenzene (TPB), was synthe-sized applying palladium(0) catalyzed Suzuki coupling reaction and its ORR activity was investigated in alkaline condition. It demonstrated comparable electrocatalytic performance of approximate to 0.89-0.9 V Fonset vs RHE with the commercially available Pt/C. Density-functional theory (DFT) calculations revealed that TT-TPB featured efficient electrocatalytic active sites derived from volumetric, areal, and O2 adsorbing calculations, which were in line with the experimental results. Moreover, semiconducting and surface properties of TT-TPB were investigated in detail using electro-chemical and spectrophotometric techniques. This work shows the potential application of thienothiophene-based metal-free CPP in the electrochemical conversion process.

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American Chemical Society (ACS)

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Chemistry, physical, Energy, Fuels, Materials science, multidisciplinary

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ACS Applied Energy Materials

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10.1021/acsaem.2c01830

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