Chemistry and Electrocatalytic Activity of Nanostructured Nickel Electrodes for Water Electrolysis

ACS Catalysis ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 6159-6170 ◽  
Author(s):  
E. López-Fernández ◽  
J. Gil-Rostra ◽  
J. P. Espinós ◽  
A. R. González-Elipe ◽  
A. de Lucas Consuegra ◽  
...  
Keyword(s):  
Electrocatalytic Activity ◽  
Water Electrolysis ◽  
Nickel Electrodes

Corrosion–resistant materials for alkaline water electrolyzers

CORROSION ◽  
10.5006/3289 ◽  
2020 ◽  
Author(s):  
César Sequeira ◽  
David Cardoso ◽  
Luís Amaral ◽  
Biljana Sljukic ◽  
Diogo Santos
Keyword(s):  
Corrosion Resistance ◽  
Stainless Steels ◽  
Electrocatalytic Activity ◽  
Review Paper ◽  
Construction Materials ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Nickel Electrodes ◽  
Valve Metals

Commercially available materials for fabricating cell bodies, electrodes, pipes, and pumps for alkaline water electrolyzers, include conventional steels and stainless steels, nickel, valve metals, polymers, and other materials. In this review paper, most of these construction materials are briefly described and discussed. Special attention is given to presently produced nickel electrodes and novel nickel-based electrocatalysts for the hydrogen and oxygen evolution reactions in alkaline water electrolysis. It is shown that their electrocatalytic activity and corrosion resistance need to be improved in order to increase their commercial interest for alkaline water electrolyzers.

Preparation of platinum-doped hollow spheres and their electrocatalytic activity in water electrolysis

2008 ◽  
Vol 25 (4) ◽  
pp. 775-779 ◽  
Author(s):  
Hong Rok Kim ◽  
Jayeeta Chattopadhyay ◽  
Jae Ik Son ◽  
Daewon Pak
Keyword(s):  
Electrocatalytic Activity ◽  
Hollow Spheres ◽  
Water Electrolysis

scholarly journals Facile electrodeposition of V-doped CoP on vertical graphene for efficient alkaline water electrolysis

RSC Advances ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 13016-13020 ◽  
Author(s):  
Linh Truong ◽  
Sanjib Baran Roy ◽  
Sahng-Kyoon Jerng ◽  
Jae Ho Jeon ◽  
Sunghun Lee ◽  
...  
Keyword(s):  
Electrochemical Deposition ◽  
Electrocatalytic Activity ◽  
Water Electrolysis ◽  
Carbon Cloth ◽  
Deposition Method ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Electrochemical Deposition Method

In this work, we demonstrate a highly enhanced electrocatalytic activity of vanadium-doped CoP (V–CoP), directly grafted on a vertical graphene/carbon cloth electrode (VG/CC) by a facile electrochemical deposition method.

Cobalt-chrome activation of the nickel electrodes for the HER in alkaline water electrolysis – Part II

2013 ◽  
Vol 38 (4) ◽  
pp. 1758-1764 ◽  
Author(s):  
Milica P. Marčeta Kaninski ◽  
Mina M. Seović ◽  
Snežana M. Miulović ◽  
Dragana L. Žugić ◽  
Gvozden S. Tasić ◽  
...  
Keyword(s):  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Nickel Electrodes ◽  
Cobalt Chrome

scholarly journals Low-temperature electrocatalytic conversion of CO2 to liquid fuels: effect of the Cu particle size

2018 ◽  
Author(s):  
Antonio De Lucas-Consuegra ◽  
Juan Carlos Serrano-Ruiz ◽  
Nuria Gutierrez-Guerra ◽  
José Luis Valverde
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Gas Phase ◽  
Electrocatalytic Activity ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Liquid Fuels ◽  
Main Reaction ◽  
Membrane Electrode ◽  
Reaction Products

A novel gas-phase electrocatalytic system based on a low-temperature proton exchange membrane (Sterion) was developed for the gas phase electrocatalytic conversion of CO2 to liquid fuels. This system achieved gas-phase electrocatalytic reduction of CO2 at low temperatures (below 90 ºC) over a Cu cathode by using water electrolysis-derived protons generated in-situ on an IrO2 anode. Three Cu-based cathodes with varying metal particle sizes were prepared by supporting this metal on an activated carbon at three loadings (50, 20, and 10 wt%; 50%Cu-AC, 20%Cu-AC, and 10%Cu-AC, respectively). The cathodes were characterized by N2 adsorption–desorption, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) whereas their performance towards the electrocatalytic conversion of CO2 was subsequently studied. The membrane electrode assembly (MEA) containing the cathode with the largest Cu particle size (50%Cu-AC, 40 nm) showed the highest CO2 electrocatalytic activity per mole of Cu, with methyl formate being the main product. This higher electrocatalytic activity was attributed to the lower Cu–CO bonding strength over large Cu particles. Different product distributions were obtained over 20%Cu-AC and 10%Cu-AC, with acetaldehyde and methanol being the main reaction products, respectively. The CO2 consumption rate increased with the applied current and the reaction temperature.

scholarly journals An improved method of water electrolysis – effect of complexing agent

2016 ◽  
Vol 6 (3) ◽  
pp. 215 ◽  
Author(s):  
Seetharaman Swaminathan ◽  
Balaji Rengarajan ◽  
Ramya Krishnan ◽  
Kaveripatnam Samban Dhathathreyan ◽  
Manickam Velan
Keyword(s):  
Surface Area ◽  
High Surface ◽  
High Surface Area ◽  
Water Electrolysis ◽  
Complexing Agent ◽  
Improved Method ◽  
Electrodeposition Technique ◽  
Alkaline Water Electrolysis ◽  
Improve Performance ◽  
Nickel Electrodes

<p class="PaperAbstract"><span lang="EN-US">The present work investigates the efficiency of an alkaline water electrolysis process in the presence of a complexing agent like citric acid (CA) when added directly into the electrolyte during the electrolytic process. High surface area nickel electrodes prepared by electrodeposition technique were used as the electrode to evaluate the efficiency of the oxygen evolution reaction (OER) by the polarization measurements and cyclic voltammetry. The quantity of the complexing agent CA in the electrolyte was varied from 0-1 wt. %. An increase in the current density of about 25% resulted at a temperature of 30 °C in the presence of 0.2 wt. % of CA at 1.0 V </span><span lang="EN-US">vs.</span><span lang="EN-US"> Hg/HgO. CA was found to improve performance by forming a complex with the alloy electrode and by formation of the high surface area catalyst for efficient OER.</span></p>

scholarly journals Low-Temperature Electrocatalytic Conversion of CO2 to Liquid Fuels: Effect of the Cu Particle Size

Catalysts ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 340 ◽  
Author(s):  
Antonio de Lucas-Consuegra ◽  
Juan Serrano-Ruiz ◽  
Nuria Gutiérrez-Guerra ◽  
José Valverde
Keyword(s):  
Particle Size ◽  
Low Temperature ◽  
Gas Phase ◽  
Electrocatalytic Activity ◽  
Water Electrolysis ◽  
Proton Exchange ◽  
Liquid Fuels ◽  
Main Reaction ◽  
Membrane Electrode ◽  
Reaction Products

A novel gas-phase electrocatalytic system based on a low-temperature proton exchange membrane (Sterion) was developed for the gas-phase electrocatalytic conversion of CO2 to liquid fuels. This system achieved gas-phase electrocatalytic reduction of CO2 at low temperatures (below 90 °C) over a Cu cathode by using water electrolysis-derived protons generated in-situ on an IrO2 anode. Three Cu-based cathodes with varying metal particle sizes were prepared by supporting this metal on an activated carbon at three loadings (50, 20, and 10 wt %; 50% Cu-AC, 20% Cu-AC, and 10% Cu-AC, respectively). The cathodes were characterized by N2 adsorption–desorption, temperature-programmed reduction (TPR), and X-ray diffraction (XRD) and their performance towards the electrocatalytic conversion of CO2 was subsequently studied. The membrane electrode assembly (MEA) containing the cathode with the largest Cu particle size (50% Cu-AC, 40 nm) showed the highest CO2 electrocatalytic activity per mole of Cu, with methyl formate being the main product. This higher electrocatalytic activity was attributed to the lower Cu–CO bonding strength over large Cu particles. Different product distributions were obtained over 20% Cu-AC and 10% Cu-AC, with acetaldehyde and methanol being the main reaction products, respectively. The CO2 consumption rate increased with the applied current and reaction temperature.

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