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

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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Publicado:	2017
Materias:	Electrochemical impedance spectroscopy Hydrogen evolution reaction Nickel/Copper Nickel/Silver Spontaneous deposition Catalysts Cathodes Cyclic voltammetry Deposition Electrochemical electrodes Electrodes Hydrogen Kinetics Nickel Rotating disks Silver Spectroscopy Transition metals Electronic configuration Hydrogen evolution Hydrogen evolution rate Hydrogen evolution reactions Improved activities Kinetic and thermodynamic parameters Rotating disk electrodes
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20954956_v26_n3_p466_Franceschini http://hdl.handle.net/20.500.12110/paper_20954956_v26_n3_p466_Franceschini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_20954956_v26_n3_p466_Franceschini
record_format	dspace
spelling	paper:paper_20954956_v26_n3_p466_Franceschini2023-06-08T16:34:19Z Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu Electrochemical impedance spectroscopy Hydrogen evolution reaction Nickel/Copper Nickel/Silver Spontaneous deposition Catalysts Cathodes Cyclic voltammetry Deposition Electrochemical electrodes Electrodes Hydrogen Kinetics Nickel Rotating disks Silver Spectroscopy Transition metals Electronic configuration Hydrogen evolution Hydrogen evolution rate Hydrogen evolution reactions Improved activities Kinetic and thermodynamic parameters Rotating disk electrodes Spontaneous deposition Electrochemical impedance spectroscopy 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 –1.5 V (vs. SCE), is similar on Ni/Cu and Ni/Ag electrodes. © 2016 Science Press 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20954956_v26_n3_p466_Franceschini http://hdl.handle.net/20.500.12110/paper_20954956_v26_n3_p466_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 Catalysts Cathodes Cyclic voltammetry Deposition Electrochemical electrodes Electrodes Hydrogen Kinetics Nickel Rotating disks Silver Spectroscopy Transition metals Electronic configuration Hydrogen evolution Hydrogen evolution rate Hydrogen evolution reactions Improved activities Kinetic and thermodynamic parameters Rotating disk electrodes Spontaneous deposition Electrochemical impedance spectroscopy
spellingShingle	Electrochemical impedance spectroscopy Hydrogen evolution reaction Nickel/Copper Nickel/Silver Spontaneous deposition Catalysts Cathodes Cyclic voltammetry Deposition Electrochemical electrodes Electrodes Hydrogen Kinetics Nickel Rotating disks Silver Spectroscopy Transition metals Electronic configuration Hydrogen evolution Hydrogen evolution rate Hydrogen evolution reactions Improved activities Kinetic and thermodynamic parameters Rotating disk electrodes Spontaneous deposition Electrochemical impedance spectroscopy 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 Catalysts Cathodes Cyclic voltammetry Deposition Electrochemical electrodes Electrodes Hydrogen Kinetics Nickel Rotating disks Silver Spectroscopy Transition metals Electronic configuration Hydrogen evolution Hydrogen evolution rate Hydrogen evolution reactions Improved activities Kinetic and thermodynamic parameters Rotating disk electrodes Spontaneous deposition Electrochemical impedance spectroscopy
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 –1.5 V (vs. SCE), is similar on Ni/Cu and Ni/Ag electrodes. © 2016 Science Press
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
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_20954956_v26_n3_p466_Franceschini http://hdl.handle.net/20.500.12110/paper_20954956_v26_n3_p466_Franceschini
_version_	1768544933538430976

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

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