Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?
Authorized Users Only
2019
Authors
Bajuk-Bogdanović, Danica
Holclajtner-Antunović, Ivanka
Jovanović, Zoran

Mravik, Željko

Krstić, Jugoslav

Uskoković-Marković, Snežana
Vujković, Milica

Article (Published version)

Metadata
Show full item recordAbstract
The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interact...ion with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon.
Keywords:
Heteropoly acid / Activated carbon / Oxygen functional groups / Composite materials / SupercapacitorSource:
Journal of Solid State Electrochemistry, 2019, 23, 9, 2747-2758Publisher:
- Springer Science and Business Media LLC
Funding / projects:
- Electroconducting and redox-active polymers and oligomers: synthesis, structure, properties and applications (RS-172043)
- Physics and Chemistry with Ion Beams (RS-45006)
- Slovenian Research Agency (P2-0091)
- Lithium-ion batteries and fuel cells - research and development (RS-45014)
DOI: 10.1007/s10008-019-04369-4
ISSN: 1432-8488; 1433-0768
WoS: 000484549900012
Scopus: 2-s2.0-85071463941
Collections
Institution/Community
IHTMTY - JOUR AU - Bajuk-Bogdanović, Danica AU - Holclajtner-Antunović, Ivanka AU - Jovanović, Zoran AU - Mravik, Željko AU - Krstić, Jugoslav AU - Uskoković-Marković, Snežana AU - Vujković, Milica PY - 2019 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/3368 AB - The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon. PB - Springer Science and Business Media LLC T2 - Journal of Solid State Electrochemistry T1 - Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from? VL - 23 IS - 9 SP - 2747 EP - 2758 DO - 10.1007/s10008-019-04369-4 ER -
@article{ author = "Bajuk-Bogdanović, Danica and Holclajtner-Antunović, Ivanka and Jovanović, Zoran and Mravik, Željko and Krstić, Jugoslav and Uskoković-Marković, Snežana and Vujković, Milica", year = "2019", abstract = "The synergistic effects between two Keggin-type heteropoly acids (HPAs) and carbon surface were examined and elucidated. An improved high rate capability (and potential high capacitor electrode for supercapacitors) of the hybrid materials, obtained by anchoring of α-dodecamolybdophosphoric (MoPA), α-dodecatungstophosphoric (WPA), and their mixture to activated carbon (AC), was achieved through the different mechanism of interaction. In order to elaborate this, a detailed analysis of AC-HPA composites has been performed by scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) analysis, temperature-programmed desorption (TPD), Fourier-transform infrared spectroscopy (FTIR), micro Raman spectroscopy, and zeta potential measurements. The zeta potential measurements revealed positive charge of carbon surface thus indicating attractive interactions with negatively charged Keggin anion. The surface analysis has shown that WPA spontaneously reduces the carbon surface, while interaction with MoPA leads to its oxidation. As the consequence of the tailoring of the functional groups at carbon surface through HPAs’ action, the distortion of cyclic voltammograms (CVs) decreased in the following order: AC-MoPA, AC-MoPA-WPA, and AC-WPA. A prominent rectangular shape of AC-WPA, even at an extremely high scan rate of 400 mVs−1, was measured, which is rarely demonstrated for carbon-based composites. By applying the theory of electrode potentials, the HPA-AC synergistic effect was explained and discussed in terms of charge storage improvement of HPA-modified carbon.", publisher = "Springer Science and Business Media LLC", journal = "Journal of Solid State Electrochemistry", title = "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?", volume = "23", number = "9", pages = "2747-2758", doi = "10.1007/s10008-019-04369-4" }
Bajuk-Bogdanović, D., Holclajtner-Antunović, I., Jovanović, Z., Mravik, Ž., Krstić, J., Uskoković-Marković, S.,& Vujković, M.. (2019). Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry Springer Science and Business Media LLC., 23(9), 2747-2758. https://doi.org/10.1007/s10008-019-04369-4
Bajuk-Bogdanović D, Holclajtner-Antunović I, Jovanović Z, Mravik Ž, Krstić J, Uskoković-Marković S, Vujković M. Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?. in Journal of Solid State Electrochemistry. 2019;23(9):2747-2758. doi:10.1007/s10008-019-04369-4 .
Bajuk-Bogdanović, Danica, Holclajtner-Antunović, Ivanka, Jovanović, Zoran, Mravik, Željko, Krstić, Jugoslav, Uskoković-Marković, Snežana, Vujković, Milica, "Tailoring the electrochemical charge storage properties of carbonaceous support by redox properties of heteropoly acids: where does the synergy come from?" in Journal of Solid State Electrochemistry, 23, no. 9 (2019):2747-2758, https://doi.org/10.1007/s10008-019-04369-4 . .