Improved HER activity of Ni and stainless steel electrodes activated by NiCoMo ionic activator - A combined DFT and experimental study
Само за регистроване кориснике
АуториMaslovara, Slađana Lj.
Vasić Anićijević, Dragana D.
Kijevčanin, Mirjana Lj.
Radovic, Ivona R.
Nikolić, Vladimir M.
Marčeta Kaninski, Milica
Чланак у часопису
МетаподациПриказ свих података о документу
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. (C) 2017 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Кључне речи:Alkaline water electrolysis / In-situ activation / Ionic activators / Electrocatalysis / HER
Извор:International Journal of Hydrogen Energy, 2017, 42, 8, 5072-5082
- Водонична енергија - развој нових материјала: електролитичко добијање водоника, водоничне горивне ћелије, изотопски ефекти (RS-172045)
ISSN: 0360-3199 (print); 1879-3487 (electronic)
Showing items related by title, author, creator and subject.
Effects of age and dexamethasone treatment on glucocorticoid response element and activating protein-1 binding activity in rat brain Terzic, N; Vujcic, M; Ristić-Fira, Aleksandra; Krstic-Demonacos, M; Milanovic, D; Kanazir, DT; Ruzdijic, S (Journals of Gerontology. Series A: Biological Sciences and Medical Sciences, 2003)
Catalytic activity of Pt-based intermetallics for the hydrogen production - Influence of ionic activator Marčeta Kaninski, Milica; Nikolić, Vladimir M.; Potkonjak, Tanja N.; Simonovic, Branislav R.; Potkonjak, Nebojša I. (Applied Catalysis. A: General, 2007)
Plane tree seed biomass used for preparation of activated carbons (AC) derived from pyrolysis. Modeling the activation process Dodevski, Vladimir; Janković, Bojan Ž.; Stojmenović, Marija; Krstić, Sanja S.; Popović, Jasmina G.; Pagnacco, Maja C.; Popović, Maja; Pašalić, Snežana (Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 2017)