Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu

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Nickel modification by spontaneous deposition of transition metals such as Ag and Cu is shown as an economic and simple alternative for the activation of hydrogen evolution reaction (HER) on cathodes in alkaline media. The kinetics of HER is studied on Ni/Ag and Ni/Cu catalysts by cyclic voltammetry...

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Autores principales: Franceschini, E.A., Lacconi, G.I., Corti, H.R.
Formato: INPR
Materias:
Electrochemical impedance spectroscopy
Hydrogen evolution reaction
Nickel/Copper
Nickel/Silver
Spontaneous deposition
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_20954956_v_n_p_Franceschini
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_20954956_v_n_p_Franceschini2023-10-03T16:39:22Z Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu Franceschini, E.A. Lacconi, G.I. Corti, H.R. Electrochemical impedance spectroscopy Hydrogen evolution reaction Nickel/Copper Nickel/Silver Spontaneous deposition Nickel modification by spontaneous deposition of transition metals such as Ag and Cu is shown as an economic and simple alternative for the activation of hydrogen evolution reaction (HER) on cathodes in alkaline media. The kinetics of HER is studied on Ni/Ag and Ni/Cu catalysts by cyclic voltammetry and electrochemical impedance spectroscopy (EIS) using a rotating disk electrode (RDE). Freshly synthesized catalysts, as well as catalysts subjected to a short chronoamperometric ageing procedure, are analyzed and the kinetic and thermodynamic parameters of the HER are obtained. The nickel surface modified with transition metals with an outer shell electronic configuration [xd10(x+1)s1], such as Cu (3d104s1) and Ag (4d105s1), shows an improved activity for the HER compared to bare nickel. Furthermore, the Ni/Cu catalyst presents a decreased onset potential. The hydrogen evolution rate, measured as current density at -1.5V (vs. SCE), is similar on Ni/Cu and Ni/Ag electrodes. © 2016 Science Press. Fil:Franceschini, E.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Corti, H.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. INPR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_20954956_v_n_p_Franceschini
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Electrochemical impedance spectroscopy
Hydrogen evolution reaction
Nickel/Copper
Nickel/Silver
Spontaneous deposition
spellingShingle Electrochemical impedance spectroscopy
Hydrogen evolution reaction
Nickel/Copper
Nickel/Silver
Spontaneous deposition
Franceschini, E.A.
Lacconi, G.I.
Corti, H.R.
Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
topic_facet Electrochemical impedance spectroscopy
Hydrogen evolution reaction
Nickel/Copper
Nickel/Silver
Spontaneous deposition
description Nickel modification by spontaneous deposition of transition metals such as Ag and Cu is shown as an economic and simple alternative for the activation of hydrogen evolution reaction (HER) on cathodes in alkaline media. The kinetics of HER is studied on Ni/Ag and Ni/Cu catalysts by cyclic voltammetry and electrochemical impedance spectroscopy (EIS) using a rotating disk electrode (RDE). Freshly synthesized catalysts, as well as catalysts subjected to a short chronoamperometric ageing procedure, are analyzed and the kinetic and thermodynamic parameters of the HER are obtained. The nickel surface modified with transition metals with an outer shell electronic configuration [xd10(x+1)s1], such as Cu (3d104s1) and Ag (4d105s1), shows an improved activity for the HER compared to bare nickel. Furthermore, the Ni/Cu catalyst presents a decreased onset potential. The hydrogen evolution rate, measured as current density at -1.5V (vs. SCE), is similar on Ni/Cu and Ni/Ag electrodes. © 2016 Science Press.
format INPR
author Franceschini, E.A.
Lacconi, G.I.
Corti, H.R.
author_facet Franceschini, E.A.
Lacconi, G.I.
Corti, H.R.
author_sort Franceschini, E.A.
title Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
title_short Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
title_full Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
title_fullStr Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
title_full_unstemmed Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu
title_sort hydrogen evolution kinetics on ni cathodes modified by spontaneous deposition of ag or cu
url http://hdl.handle.net/20.500.12110/paper_20954956_v_n_p_Franceschini
work_keys_str_mv AT franceschiniea hydrogenevolutionkineticsonnicathodesmodifiedbyspontaneousdepositionofagorcu
AT lacconigi hydrogenevolutionkineticsonnicathodesmodifiedbyspontaneousdepositionofagorcu
AT cortihr hydrogenevolutionkineticsonnicathodesmodifiedbyspontaneousdepositionofagorcu
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