| Popis: |
Funding Information: Capacitance values reflect to some degree (i) topology of the electrodes, (ii) cleanliness of the system and (iii) how much of the actual structure is probed with the applied electrochemical method. For example, with EIS, only the surface of the electrode is probed with small high frequency perturbing signals, whereas in CV the entire structure of material is examined. Hence, in general EIS reduces the contribution of the pseudofaradaic reactions to the capacitance (see supporting information, Fig. S5). Therefore, capacitances evaluated with EIS are here referred to as true double layer capacitance Cdl. Values are shown in Table 4. where it can be seen that Cdl values are considerably smaller whenThe authors acknowledge Laura Ferrel Pascual for taking the SEM images and Touko Liljeström for fabricating ta-C film. Bjørn Mikladal from Canatu Oy is acknowledged for fabricating SWCNT network. The authors also acknowledge Dr. Jessica Koehne for providing facilities at NASA Ames research center and much appreciated guidance with respect to CNF fabrication. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under contract no. DE-AC02-76SF00515. M.A. acknowledges funding from the Jane and Aatos Erkko Foundation and S.S from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 841621. Funding Information: The authors acknowledge Laura Ferrel Pascual for taking the SEM images and Touko Liljeström for fabricating ta-C film. Bjørn Mikladal from Canatu Oy is acknowledged for fabricating SWCNT network. The authors also acknowledge Dr. Jessica Koehne for providing facilities at NASA Ames research center and much appreciated guidance with respect to CNF fabrication. Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under contract no. DE-AC02-76SF00515 . M.A. acknowledges funding from the Jane and Aatos Erkko Foundation and S.S from the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie grant agreement No 841621 . Publisher Copyright: © 2022 The Authors | openaire: EC/H2020/841621/EU//TACOMA Carbonaceous nanomaterials can be a game changing materials in many technological fields, especially in electroanalytical applications. However, there is no consensus on the associations between the structure and electrochemical performance of these nanomaterials – even for the most basic electrochemical properties. This challenge stems from the fact that typically carbonaceous nanomaterials are obtained from various sources and not characterized properly. Therefore, to solve this deadlock we carry out systematic electrochemical characterization for a set of in-house fabricated as well as physicochemically thoroughly characterized carbon nanomaterials. We will then proceed to establish structure – performance associations for these materials. In addition, we will highlight how sensitive the electrochemical performance of these materials can be to small changes in their structural properties. Further, we emphasize the lack of correlation between electrochemical performance of electrode materials as determined using outer sphere redox (OSR) and inner sphere redox (ISR) probes the latter being highly analyte specific. As a first consistent set of electrochemical data obtained by using well characterized carbonaceous nanomaterials, this work will provide solid basis to expand the use of these materials in more complex electroanalytical as well as other applications. |
