Unraveling a Graphene Exfoliation Technique Analogy in the Making of Ultrathin Nickel–Iron Oxyhydroxides@Nickel Foam to Promote the OER

2021 ◽  
Author(s):  
Zubair Ahmed ◽  
Krishankant ◽  
Ritu Rai ◽  
Rajinder Kumar ◽  
Takahiro Maruyama ◽  
...  
Keyword(s):  
Nickel Foam ◽  
Iron Oxyhydroxides ◽  
Nickel Iron

Carbon-encapsulated nickel-iron nanoparticles supported on nickel foam as a catalyst electrode for urea electrolysis

2017 ◽  
Vol 227 ◽  
pp. 210-216 ◽  
Author(s):  
Mao-Sung Wu ◽  
Chi-Yu Jao ◽  
Farn-Yih Chuang ◽  
Fang-Yi Chen
Keyword(s):  
Iron Nanoparticles ◽  
Nickel Foam ◽  
Nickel Iron ◽  
Urea Electrolysis ◽  
Catalyst Electrode

Ternary nickel iron phosphide supported on nickel foam as a high-efficiency electrocatalyst for overall water splitting

2018 ◽  
Vol 43 (15) ◽  
pp. 7299-7306 ◽  
Author(s):  
Chi Zhang ◽  
Yunchao Xie ◽  
Heng Deng ◽  
Cheng Zhang ◽  
Jheng-Wun Su ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Efficiency ◽  
Nickel Foam ◽  
Iron Phosphide ◽  
Nickel Iron ◽  
Overall Water Splitting

scholarly journals Nickel-Iron Layered Double Hydroxide for Highly Efficient Oxygen Evolution Reaction

2021 ◽  
Vol 290 ◽  
pp. 01036
Author(s):  
Qiuyu Zhao ◽  
Wenke Xi ◽  
Jianjun Wang
Keyword(s):  
Oxygen Evolution ◽  
Layered Double Hydroxide ◽  
Oxygen Evolution Reaction ◽  
Nickel Foam ◽  
Chemical Route ◽  
Nickel Iron ◽  
Long Term Stability ◽  
3D Space ◽  
New Strategy ◽  
Double Hydroxide

It is extensively accepted that electrolysis of water producing regenerable energy is a crucial substitution of traditional fuel strategy. Herein, we report a wet-chemical route to Ni-Fe layered double hydroxide (LDH) interconnected nanosheets with large surface area with the support of vertically aligned ZnO microrods arrays on the nickel foam (Ni-Fe LDH@ZnO/NF) for oxygen evolution reaction. Owing to the 2D Ni-Fe LDH nanosheets distributed in 3D space, the Ni-Fe LDH@ZnO/NF demonstrates excellent OER performances with a reasonably low overpotential of 271 mV at a current density of 10 mA·cm-2, and a long-term stability up to 29 hours. This work proposes a new strategy to prepare Ni-Fe LDH/NF as efficient OER catalyst.

Effect of Electro Deposition Parameters on Thickness and Fe Contents of Nickel-Iron Foam Alloys

2014 ◽  
Vol 1053 ◽  
pp. 41-49
Author(s):  
Xiao Min Huo ◽  
Gang He ◽  
Hong Yun Lin ◽  
Jian Li Wang ◽  
De Qing Wang
Keyword(s):  
Current Density ◽  
Ph Value ◽  
Nickel Foam ◽  
Energy Dispersive Spectrometer ◽  
Alloy Coating ◽  
Alloy Layer ◽  
Technological Parameters ◽  
Electro Deposition ◽  
Nickel Iron ◽  
Deposition Parameters

An Ni-Fe alloy on the surface of nickel foam was prepared by electro deposition. The effects of technological parameters including current density, pH value, temperature and the ratio of [Ni2+] to [Fe2+] of planting solution on the thickness and iron content of the alloy coating were studied. The cross-section microstructure and surface morphologies were observed by optical microscopy and scanning electron microscope, and the compositions of the alloy coating were analyzed by energy dispersive spectrometer and ICP-AES. Experiment results show that the thickness of the alloy coating is increased with increasing current density, temperature, pH value and the ratio of [Ni2+] to [Fe2+] of the planting solution. The Fe contents of the alloy coating is increased with increasing current density and pH value of the planting solution, and decreased with increasing temperature and the ratio of [Ni2+] to [Fe2+] of the planting solution. A 36.2 μm thick alloy layer of uniform and dense coating with the Fe content of 60.5 wt% is obtained under the parameters ofn(Ni2+)/n(Fe2+)= 4, current density = 10 A/dm2and pH = 4.2 at 50 °C for one hour.

Microwave-assisted synthesis of a nanoamorphous (Ni0.8,Fe0.2) oxide oxygen-evolving electrocatalyst containing only “fast” sites

2017 ◽  
Vol 5 (23) ◽  
pp. 11661-11670 ◽  
Author(s):  
Joseph M. Barforoush ◽  
Dylan T. Jantz ◽  
Tess E. Seuferling ◽  
Kelly R. Song ◽  
Laura C. Cummings ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Precious Metal ◽  
High Efficiency ◽  
Alkaline Media ◽  
Microwave Assisted Synthesis ◽  
Iron Oxyhydroxides ◽  
Nickel Iron ◽  
Microwave Assisted ◽  
Oxygen Evolving

Nickel–iron oxyhydroxides (Ni1−xFexOOH) are non-precious metal electrocatalysts for the oxygen evolution reaction (OER) that have high efficiency in alkaline media.

scholarly journals Highly active catalyst derived from a 3D foam of Fe(PO3)2/Ni2P for extremely efficient water oxidation

2017 ◽  
Vol 114 (22) ◽  
pp. 5607-5611 ◽  
Author(s):  
Haiqing Zhou ◽  
Fang Yu ◽  
Jingying Sun ◽  
Ran He ◽  
Shuo Chen ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Large Scale ◽  
Nickel Foam ◽  
Alkaline Electrolyte ◽  
Nickel Iron ◽  
Noble Metal Catalysts ◽  
Long Term Stability ◽  
Highly Active ◽  
High Durability ◽  
Oxygen Evolving

Commercial hydrogen production by electrocatalytic water splitting will benefit from the realization of more efficient and less expensive catalysts compared with noble metal catalysts, especially for the oxygen evolution reaction, which requires a current density of 500 mA/cm2 at an overpotential below 300 mV with long-term stability. Here we report a robust oxygen-evolving electrocatalyst consisting of ferrous metaphosphate on self-supported conductive nickel foam that is commercially available in large scale. We find that this catalyst, which may be associated with the in situ generated nickel–iron oxide/hydroxide and iron oxyhydroxide catalysts at the surface, yields current densities of 10 mA/cm2 at an overpotential of 177 mV, 500 mA/cm2 at only 265 mV, and 1,705 mA/cm2 at 300 mV, with high durability in alkaline electrolyte of 1 M KOH even after 10,000 cycles, representing activity enhancement by a factor of 49 in boosting water oxidation at 300 mV relative to the state-of-the-art IrO2 catalyst.

scholarly journals Inexpensive electrochemical synthesis of nickel iron sulphides on nickel foam: super active and ultra-durable electrocatalysts for alkaline electrolyte membrane water electrolysis

2016 ◽  
Vol 4 (42) ◽  
pp. 16394-16402 ◽  
Author(s):  
Pandian Ganesan ◽  
Arumugam Sivanantham ◽  
Sangaraju Shanmugam
Keyword(s):  
Electrochemical Synthesis ◽  
Nickel Foam ◽  
Current Collector ◽  
Water Electrolysis ◽  
Alkaline Electrolyte ◽  
Nickel Iron ◽  
Electrolyte Membrane ◽  
Iron Sulphides ◽  
Alkaline Membrane

The inexpensive fabrication of nano-honeycomb structured nickel iron sulphides on a nickel foam current collector is described and used as both anode and cathode in the alkaline membrane water electrolysis.

A possibility of using nickel concentrate, obtained as a result of hydrometallurgical enrichment of manganese-containing raw materials, at steel alloying

2020 ◽  
Vol 76 (7) ◽  
pp. 709-715
Author(s):  
O. Yu. Kichigina
Keyword(s):  
Raw Materials ◽  
Experimental Studies ◽  
Selective Extraction ◽  
Technological Parameters ◽  
Nickel Iron ◽  
Nickel Recovery ◽  
Nickel Concentrate ◽  
Steel Alloying ◽  
High Degree ◽  
Comprehensive Processing

At production of stainless steel expensive alloying elements, containing nickel, are used. To decrease the steel cost, substitution of nickel during steel alloying process by its oxides is an actual task. Results of analysis of thermodynamic and experimental studies of nickel reducing from its oxide presented, as well as methods of nickel oxide obtaining at manganese bearing complex raw materials enrichment and practice of its application during steel alloying. Technology of comprehensive processing of complex manganese-containing raw materials considered, including leaching and selective extraction out of the solution valuable components: manganese, nickel, iron, cobalt and copper. Based on theoretical and experiment studies, a possibility of substitution of metal nickel by concentrates, obtained as a result of hydrometallurgical enrichment, was confirmed. Optimal technological parameters, ensuring high degree of nickel recovery out of the initial raw materials were determined. It was established, that for direct steel alloying it is reasonable to add into the charge pellets, consisting of nickel concentrate and coke fines, that enables to reach the through nickel recovery at a level of 90%. The proposed method of alloying steel by nickel gives a possibility to decrease considerably steel cost at the expense of application of nickel concentrate, obtained out of tails of hydrometallurgical enrichment of manganese-bearing raw materials, which is much cheaper comparing with the metal nickel.

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