KaydedilenlerDerginizi ekleyin

Dergiler / Turkish Journal of Chemistry / 2015 / Cilt: 39 - Sayı: 3

Dinitrogen reduction on a polypyrrole coated Pt electrode under high-pressure conditions: electrochemical impedance spectroscopy studies

DİDEM BALUN KAYAN
FATİH KÖLELİ
Sayfa
648
Yayın Tarihi
2015-08-13
DOI
—
🏛️Bu makalenin bibliyografik verileri ve tam metin bağlantısı DergiPark üzerinden sağlanmıştır.
DergiPark Kaydı ↗
✨

Yapay Zeka Hızlı Bakış & Çıkarımlar

AI Insight
⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

Tafel slopes calculated from the Tafel curve and EIS-Tafel diagram gave corresponding results: 0.121 V dec$^{-1}$ and 0.128 V dec$^{-1}$, respectively; $\alpha $-transfer coefficient of 0.49 and an exchange current density with a value of 3.17 10$^{-3}$ A cm$^{-2}$ were characteristic for H$_{ad}$ formation in acidic aqueous medium.

📌 3 Maddede Bu Makale

🎯
Amaç & Hipotez:The electrochemical impedance spectroscopy (EIS) responses of a polypyrrole (PPy)-coated platinum electrode were investigated during N$_{2}$-reduction to ammonia in aqueous medium.
📊
Temel Bulgular & Veri:It was found that the optimum film thickness of polypyrrole was 0.73 $\mu $m and optimum potential for ammonia synthesis was -0.150 V under 60 bar N$_{2}$-pressure.
💡
Sonuç & Katkı:Tafel slopes calculated from the Tafel curve and EIS-Tafel diagram gave corresponding results: 0.121 V dec$^{-1}$ and 0.128 V dec$^{-1}$, respectively; $\alpha $-transfer coefficient of 0.49 and an exchange current density with a value of 3.17 10$^{-3}$ A cm$^{-2}$ were characteristic for H$_{ad}$ formation in acidic aqueous medium.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Dinitrogen reduction · conducting polypyrrole coating · high pressure reaction

Özet

The electrochemical impedance spectroscopy (EIS) responses of a polypyrrole (PPy)-coated platinum electrode were investigated during N$_{2}$-reduction to ammonia in aqueous medium. Kinetic parameters such as film resistance, pore resistance, and double layer capacitance were analyzed as a function of applied potential and polymer film thickness. The relation between kinetic parameters was discussed by combining electrolysis results. It was found that the optimum film thickness of polypyrrole was 0.73 $\mu $m and optimum potential for ammonia synthesis was -0.150 V under 60 bar N$_{2}$-pressure. The impedance responses under these conditions presented the lowest pore resistance value of ca. 2 $\Omega $ cm$^{2}$. The electrolyte resistance was also 2 $\Omega $ cm$^{2}$ and the film resistance was ca. 5 $\Omega $ cm$^{2}$. Tafel slopes calculated from the Tafel curve and EIS-Tafel diagram gave corresponding results: 0.121 V dec$^{-1}$ and 0.128 V dec$^{-1}$, respectively; $\alpha $-transfer coefficient of 0.49 and an exchange current density with a value of 3.17 10$^{-3}$ A cm$^{-2}$ were characteristic for H$_{ad}$ formation in acidic aqueous medium.

Abstract

The electrochemical impedance spectroscopy (EIS) responses of a polypyrrole (PPy)-coated platinum electrode were investigated during N$_{2}$-reduction to ammonia in aqueous medium. Kinetic parameters such as film resistance, pore resistance, and double layer capacitance were analyzed as a function of applied potential and polymer film thickness. The relation between kinetic parameters was discussed by combining electrolysis results. It was found that the optimum film thickness of polypyrrole was 0.73 $\mu $m and optimum potential for ammonia synthesis was -0.150 V under 60 bar N$_{2}$-pressure. The impedance responses under these conditions presented the lowest pore resistance value of ca. 2 $\Omega $ cm$^{2}$. The electrolyte resistance was also 2 $\Omega $ cm$^{2}$ and the film resistance was ca. 5 $\Omega $ cm$^{2}$. Tafel slopes calculated from the Tafel curve and EIS-Tafel diagram gave corresponding results: 0.121 V dec$^{-1}$ and 0.128 V dec$^{-1}$, respectively; $\alpha $-transfer coefficient of 0.49 and an exchange current density with a value of 3.17 10$^{-3}$ A cm$^{-2}$ were characteristic for H$_{ad}$ formation in acidic aqueous medium.

🔖

Bu Makaleye Atıf Yap

KAYAN, D. B., KÖLELİ, F. (2015). Dinitrogen reduction on a polypyrrole coated Pt electrode under high-pressure conditions: electrochemical impedance spectroscopy studies. Turkish Journal of Chemistry, Cilt: 39 - Sayı: 3, 648. https://ajindex.com/articles/184974

📄 Tam Metin PDF Okuyucu

📄

PDF görüntüleyici hazırlanıyor...

Kaynakça (22)

  1. van der Ham, C. J. M.; M. Koper, T. M.; Hetterscheid, D. G. H. Chem. Soc. Rev. 2014, 43, 5183–5191.
  2. Crossland, J. L.; Tyler, D. R. Coord. Chem. Rev. 2010, 254, 1883–1894.
  3. Cao, Z.; Zhou, Z.; Wan, H.; Zhang, Q. Inter. J. Quantum Chem. 2005, 103, 344–353.
  4. Pool, J. A.; Lobkovsky, E.; Chirik, P. J. Nature 2004, 427, 527–530. K¨oleli, F.; Balun Kayan, D. J. Electroanal. Chem. 2010, 638, 119–122. K¨oleli, F.; R¨opke, D.; Aydın, R.; R¨opke, T. J. Appl. Electrochem. 2011, 41, 405–413.
  5. Howalt, J. G.; Vegge, T. Phys. Chem. Chem. Phys. 2013, 15, 20957. Strelets, V. V.; Gavrilov, A. B.; Tsarev, V. N.; Shilova, A. K.; Didenko, L. P.; Shilov, A. E. Kinet. Catal. 1986, 27, 284–290.
  6. Giddey, S.; Badwal, S. P. S.; Kulkarni, A. Int. J. Hydrogen Energy 2013, 38, 14576–14594.
  7. Denisov, N. T.; Efimov, O. N.; Shuvalova, N. I.; Nikolaeva, G. V.; Lisitskaya, A. P. Catal. 1990, 31, 1295–1296.
  8. Valov, I.; Luerssen, B.; Mutoro, E.; Gregoratti, E. L.; De Souza, R. A.; Bredow, T.; Gunther, S.; Barinov, A.; Dudin, P.; Martin, M.; et al. Phys. Chem. Chem. Phys. 2011, 13, 3394–3410.
  9. Tsuneto, A.; Kudo, A.; Sakata, T. J. Electroanal. Chem. 1994, 367, 183–188.
  10. Ito, Y.; Goto, T. J. Nucl. Mater. 2005, 344, 128–135.
  11. Marnellos, G.; Stoikides, M. Science 1998, 282, 98–100.
  12. Kordali, V.; Kryiacou, G.; Lambrou, C. Chem. Commun. 2000, 17, 1673–1674.
  13. Murakami, T.; Nohira, T. Goto, T.; Ogata, Y. H.; Ito, Y. Electrochim. Acta 2005, 50, 5423-5426.
  14. Murakami, T.; Nishikiori, T.; Nohira, T.; Ito, Y. Electrochem. Solid-State Lett. 2005, 8 D19–D21. K¨oleli, F.; R¨opke, T. Appl. Cata. B 2006, 62, 306–310. Posp´ıˇsil, L.; Bul´ıˇckov´a, J.; Hromadova, M.; Gal, M.; Civis, S.; Cihelka, J.; Tarabek, J. Chem. Commun. 2007, 2270–2272.
  15. Murakami, T.; Nohira, T.; Araki, Y.; Goto, T.; Hagiwara, R.; Ogata, Y. H. Electrochem. Solid-State Lett. 2007, 10, E4–E6. Hickling, A.; Salt, F. W. Trans. Faraday Soc. 1940, 36, 1226–1235.
  16. Kumar, D.; Sharma, R. C. Eur. Polym. J. 1998, 34, 1053–1060.
  17. Hu, C. C.; Chu, C. H. J. Electroanal. Chem. 2001, 503, 105–116.
  18. Ren, Y. J.; Zeng, C. L. J. Power Sources 2008, 182, 524–530.
  19. Hitz, C.; Lasia, A. J. Electroanal. Chem. 2001, 500, 213–222.
  20. Losiewicz, B.; Budniok, A.; Rowinski, E.; Lagiewka, E.; Lasia, A. Int. J. Hydrogen Energy 2004, 29, 145–157. T¨uken, T.; Erbil, M.; Yazıcı, B. In Corrosion Research Trends; Wang, I. S., Ed. Nova: Hauppauge, NY, USA, 2007, pp. 1–42.
  21. Yamada, Y.; Sasaki, T.; Tatsuda, N.; Weingarth, D.; Yano, K.; K¨otz, R. Electrochim. Acta 2012, 81, 138–148.
  22. Hagen, G.; Dubbe, A.;