Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study
Само за регистроване кориснике
2017
Аутори
Maslovara, Slađana Lj.Vasić-Anićijević, Dragana D.
Kijevčanin, Mirjana
Radović, Ivona
Nikolić, Vladimir M.
Laušević, Petar
Marčeta-Kaninski, Milica
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
In this paper we discussed various factors contributing to the improvement of hydrogen evolution reaction (HER) activity of Ni and stainless steel electrodes activated by in situ addition of NiCoMo activators, using a combination of experimental techniques and DFT calculations. By comparing energy consumption of stainless steel (SS) electrodes in a lab scale alkaline electrolyzer with and without ionic activation, we obtained reduction of energy consumption by 21% at industrial conditions (high current density and temperature). We recorded U-I curves for activated and non-activated stainless steel electrodes in the current density range from 40 to 500 mA cm(2) and in the temperature range 298-343 K, and the obtained results were used in an electrochemical model of the laboratory alkaline electrolyzer. Increase of the electrode surface upon addition of ionic activators was confirmed by profilometric measurements and SEM analysis. Finally, we applied density functional theory (DFT) to di...scuss partial roles of applied ionic activators (Ni, Co and Mo) in the modification and improvement of the intrinsic properties of the cathode towards the HER in alkaline medium. From the combination of profilometric, SEM and DFT results, we conclude that the main factor contributing to the improvement of HER activity of Ni electrodes upon NiCoMo activation is the increase of electrode surface area.
Кључне речи:
Alkaline water electrolysis / In-situ activation / Ionic activators / Electrocatalysis / HERИзвор:
International Journal of Hydrogen Energy, 2017, 42, 8, 5072-5082Издавач:
- Pergamon-Elsevier Science Ltd, Oxford
Финансирање / пројекти:
- Водонична енергија - развој нових материјала: електролитичко добијање водоника, водоничне горивне ћелије, изотопски ефекти (RS-MESTD-Basic Research (BR or ON)-172045)
DOI: 10.1016/j.ijhydene.2016.12.116
ISSN: 0360-3199
WoS: 000403852600035
Scopus: 2-s2.0-85009812175
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Maslovara, Slađana Lj. AU - Vasić-Anićijević, Dragana D. AU - Kijevčanin, Mirjana AU - Radović, Ivona AU - Nikolić, Vladimir M. AU - Laušević, Petar AU - Marčeta-Kaninski, Milica PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3727 AB - In this paper we discussed various factors contributing to the improvement of hydrogen evolution reaction (HER) activity of Ni and stainless steel electrodes activated by in situ addition of NiCoMo activators, using a combination of experimental techniques and DFT calculations. By comparing energy consumption of stainless steel (SS) electrodes in a lab scale alkaline electrolyzer with and without ionic activation, we obtained reduction of energy consumption by 21% at industrial conditions (high current density and temperature). We recorded U-I curves for activated and non-activated stainless steel electrodes in the current density range from 40 to 500 mA cm(2) and in the temperature range 298-343 K, and the obtained results were used in an electrochemical model of the laboratory alkaline electrolyzer. Increase of the electrode surface upon addition of ionic activators was confirmed by profilometric measurements and SEM analysis. Finally, we applied density functional theory (DFT) to discuss partial roles of applied ionic activators (Ni, Co and Mo) in the modification and improvement of the intrinsic properties of the cathode towards the HER in alkaline medium. From the combination of profilometric, SEM and DFT results, we conclude that the main factor contributing to the improvement of HER activity of Ni electrodes upon NiCoMo activation is the increase of electrode surface area. PB - Pergamon-Elsevier Science Ltd, Oxford T2 - International Journal of Hydrogen Energy T1 - Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study EP - 5082 IS - 8 SP - 5072 VL - 42 DO - 10.1016/j.ijhydene.2016.12.116 ER -
@article{ author = "Maslovara, Slađana Lj. and Vasić-Anićijević, Dragana D. and Kijevčanin, Mirjana and Radović, Ivona and Nikolić, Vladimir M. and Laušević, Petar and Marčeta-Kaninski, Milica", year = "2017", abstract = "In this paper we discussed various factors contributing to the improvement of hydrogen evolution reaction (HER) activity of Ni and stainless steel electrodes activated by in situ addition of NiCoMo activators, using a combination of experimental techniques and DFT calculations. By comparing energy consumption of stainless steel (SS) electrodes in a lab scale alkaline electrolyzer with and without ionic activation, we obtained reduction of energy consumption by 21% at industrial conditions (high current density and temperature). We recorded U-I curves for activated and non-activated stainless steel electrodes in the current density range from 40 to 500 mA cm(2) and in the temperature range 298-343 K, and the obtained results were used in an electrochemical model of the laboratory alkaline electrolyzer. Increase of the electrode surface upon addition of ionic activators was confirmed by profilometric measurements and SEM analysis. Finally, we applied density functional theory (DFT) to discuss partial roles of applied ionic activators (Ni, Co and Mo) in the modification and improvement of the intrinsic properties of the cathode towards the HER in alkaline medium. From the combination of profilometric, SEM and DFT results, we conclude that the main factor contributing to the improvement of HER activity of Ni electrodes upon NiCoMo activation is the increase of electrode surface area.", publisher = "Pergamon-Elsevier Science Ltd, Oxford", journal = "International Journal of Hydrogen Energy", title = "Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study", pages = "5082-5072", number = "8", volume = "42", doi = "10.1016/j.ijhydene.2016.12.116" }
Maslovara, S. Lj., Vasić-Anićijević, D. D., Kijevčanin, M., Radović, I., Nikolić, V. M., Laušević, P.,& Marčeta-Kaninski, M.. (2017). Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study. in International Journal of Hydrogen Energy Pergamon-Elsevier Science Ltd, Oxford., 42(8), 5072-5082. https://doi.org/10.1016/j.ijhydene.2016.12.116
Maslovara SL, Vasić-Anićijević DD, Kijevčanin M, Radović I, Nikolić VM, Laušević P, Marčeta-Kaninski M. Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study. in International Journal of Hydrogen Energy. 2017;42(8):5072-5082. doi:10.1016/j.ijhydene.2016.12.116 .
Maslovara, Slađana Lj., Vasić-Anićijević, Dragana D., Kijevčanin, Mirjana, Radović, Ivona, Nikolić, Vladimir M., Laušević, Petar, Marčeta-Kaninski, Milica, "Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study" in International Journal of Hydrogen Energy, 42, no. 8 (2017):5072-5082, https://doi.org/10.1016/j.ijhydene.2016.12.116 . .
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