The hydrogen evolution reaction (HER) was investigated in 0.5 M H2SO4 at thin iridium layers electrodeposited on Ti2AlC substrate. Five samples, varying in thickness from 4.5 nm to 255 nm, were electrodeposited from the solution containing K3IrCl6 + Na2SO4. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were applied for morphology and chemical composition analysis. Metallic iridium was detected by X-ray photoelectron spectroscopy (XPS). The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were characterized with the low Tafel slopes -18 mV dec(-1), while at higher current densities increased up to -56 mV dec(-1). The overpotential at j = -0.1 A cm(-2) was-45 mV, while at j = -0.01 A cm(-2) varied from 25.1 mV to 36.1 mV. These novel catalysts exhibited excellent activity, especially under industrial conditions of hydrogen production (j = -0.3 A cm(-2)) the determined overpotentials... were between 66 and 69 mV only.
TY - JOUR
AU - Elezović, Nevenka R.
AU - Branković, Goran
AU - Zabinski, P.
AU - Marzec, M.
AU - Jović, Vladimir D
PY - 2020
UR - http://rimsi.imsi.bg.ac.rs/handle/123456789/1325
AB - The hydrogen evolution reaction (HER) was investigated in 0.5 M H2SO4 at thin iridium layers electrodeposited on Ti2AlC substrate. Five samples, varying in thickness from 4.5 nm to 255 nm, were electrodeposited from the solution containing K3IrCl6 + Na2SO4. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were applied for morphology and chemical composition analysis. Metallic iridium was detected by X-ray photoelectron spectroscopy (XPS). The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were characterized with the low Tafel slopes -18 mV dec(-1), while at higher current densities increased up to -56 mV dec(-1). The overpotential at j = -0.1 A cm(-2) was-45 mV, while at j = -0.01 A cm(-2) varied from 25.1 mV to 36.1 mV. These novel catalysts exhibited excellent activity, especially under industrial conditions of hydrogen production (j = -0.3 A cm(-2)) the determined overpotentials were between 66 and 69 mV only.
PB - Elsevier Science Sa, Lausanne
T2 - Journal of Electroanalytical Chemistry
T1 - Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis
VL - 878
DO - 10.1016/j.jelechem.2020.114575
ER -
@article{
author = "Elezović, Nevenka R. and Branković, Goran and Zabinski, P. and Marzec, M. and Jović, Vladimir D",
year = "2020",
abstract = "The hydrogen evolution reaction (HER) was investigated in 0.5 M H2SO4 at thin iridium layers electrodeposited on Ti2AlC substrate. Five samples, varying in thickness from 4.5 nm to 255 nm, were electrodeposited from the solution containing K3IrCl6 + Na2SO4. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were applied for morphology and chemical composition analysis. Metallic iridium was detected by X-ray photoelectron spectroscopy (XPS). The HER was investigated by polarization and electrochemical impedance spectroscopy (EIS) measurements. Polarization curves were characterized with the low Tafel slopes -18 mV dec(-1), while at higher current densities increased up to -56 mV dec(-1). The overpotential at j = -0.1 A cm(-2) was-45 mV, while at j = -0.01 A cm(-2) varied from 25.1 mV to 36.1 mV. These novel catalysts exhibited excellent activity, especially under industrial conditions of hydrogen production (j = -0.3 A cm(-2)) the determined overpotentials were between 66 and 69 mV only.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Electroanalytical Chemistry",
title = "Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis",
volume = "878",
doi = "10.1016/j.jelechem.2020.114575"
}
Elezović, N. R., Branković, G., Zabinski, P., Marzec, M.,& Jović, V. D.. (2020). Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis. in Journal of Electroanalytical Chemistry
Elsevier Science Sa, Lausanne., 878.
https://doi.org/10.1016/j.jelechem.2020.114575
Elezović NR, Branković G, Zabinski P, Marzec M, Jović VD. Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis. in Journal of Electroanalytical Chemistry. 2020;878.
doi:10.1016/j.jelechem.2020.114575 .
Elezović, Nevenka R., Branković, Goran, Zabinski, P., Marzec, M., Jović, Vladimir D, "Ultra-thin layers of iridium electrodeposited on Ti2AlC support as cost effective catalysts for hydrogen production by water electrolysis" in Journal of Electroanalytical Chemistry, 878 (2020),
https://doi.org/10.1016/j.jelechem.2020.114575 . .
