Abstract
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 synthesized applying palladium(0) catalyzed Suzuki coupling reaction and its ORR activity was investigated in alkaline condition. It demonstrated comparable electrocatalytic performance of ≈0.89-0.9 V Eonsetvs 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 O2adsorbing calculations, which were in line with the experimental results. Moreover, semiconducting and surface properties of TT-TPB were investigated in detail using electrochemical and spectrophotometric techniques. This work shows the potential application of thienothiophene-based metal-free CPP in the electrochemical conversion process.
Original language | English |
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Pages (from-to) | 13284-13292 |
Number of pages | 9 |
Journal | ACS Applied Energy Materials |
Volume | 5 |
Issue number | 11 |
DOIs | |
Publication status | Published - 28 Nov 2022 |
Bibliographical note
Publisher Copyright:© 2022 American Chemical Society. All rights reserved.
Funding
We thank Higher Education Council of Turkey (YOK) and TUBITAK grants to R.I. (PhD, 100/2000 YOK and 2211A BIDEP/TUBITAK). The authors thank ITU (Istanbul Technical University) and Unsped Global Lojistik, Turkey, for financial support. We also thank Dr. Sarp Kaya and KUTEM (Koç University Tüpraş Energy Center) for using their infrastructure. T.B. also thanks Kaan Şimşek for his valuable help.
Funders | Funder number |
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Istanbul Teknik Üniversitesi |
Keywords
- catalyst kinetics
- conjugated porous polymer (CPP)
- metal-free electrocatalyst
- oxygen reduction reaction (ORR)
- polymeric electrocatalyst
- thienothiophene