Low-cost and energy-efficient asymmetric nickel electrode for alkaline water electrolysis

2015 ◽  
Vol 40 (34) ◽  
pp. 10720-10725 ◽  
Author(s):  
Jong-Hoon Kim ◽  
Jung-Nam Lee ◽  
Chung-Yul Yoo ◽  
Kyo-Beum Lee ◽  
Woong-Moo Lee
Keyword(s):  
Energy Efficient ◽  
Low Cost ◽  
Water Electrolysis ◽  
Nickel Electrode ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

Atomic Heterointerface Engineering Breaks Activity Limitation of Electrocatalysts and Promises Highly-Efficient Alkaline Water Splitting

2021 ◽  
Author(s):  
Qiucheng Xu ◽  
Jiahao Zhang ◽  
Haoxuan Zhang ◽  
Liyue Zhang ◽  
Ling Chen ◽  
...  
Keyword(s):  
Water Splitting ◽  
Anion Exchange ◽  
Low Cost ◽  
Water Electrolysis ◽  
Anion Exchange Membrane ◽  
Alkaline Water Electrolysis ◽  
Green Electricity ◽  
Alkaline Water ◽  
Highly Efficient ◽  
Exchange Membrane

Alkaline water splitting, especially the anion-exchange-membrane based water electrolysis, is an attractive way for low-cost and scalable H2 production. Green electricity-driven alkaline water electrolysis is requested to develop highly-efficient electrocatalysts...

Performance of nickel electrode for alkaline water electrolysis prepared by high pressure cold spray

2020 ◽  
Vol 45 (58) ◽  
pp. 33007-33015
Author(s):  
X.G. Jiang ◽  
Y.P. Zhang ◽  
C. Song ◽  
Y.C. Xie ◽  
T.K. Liu ◽  
...  
Keyword(s):  
High Pressure ◽  
Cold Spray ◽  
Water Electrolysis ◽  
Nickel Electrode ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

scholarly journals Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1336 ◽  
Author(s):  
Alejandro N. Colli ◽  
Hubert H. Girault ◽  
Alberto Battistel
Keyword(s):  
Large Scale ◽  
Low Cost ◽  
Renewable Energy Sources ◽  
Water Electrolysis ◽  
Industrial Applications ◽  
Alkaline Water Electrolysis ◽  
Stainless Steel 316L ◽  
Experimental Conditions ◽  
Alkaline Water ◽  
Cell Components

Water electrolysis is a promising approach to hydrogen production from renewable energy sources. Alkaline water electrolyzers allow using non-noble and low-cost materials. An analysis of common assumptions and experimental conditions (low concentrations, low temperature, low current densities, and short-term experiments) found in the literature is reported. The steps to estimate the reaction overpotentials for hydrogen and oxygen reactions are reported and discussed. The results of some of the most investigated electrocatalysts, namely from the iron group elements (iron, nickel, and cobalt) and chromium are reported. Past findings and recent progress in the development of efficient anode and cathode materials appropriate for large-scale water electrolysis are presented. The experimental work is done involving the direct-current electrolysis of highly concentrated potassium hydroxide solutions at temperatures between 30 and 100 °C, which are closer to industrial applications than what is usually found in literature. Stable cell components and a good performance was achieved using Raney nickel as a cathode and stainless steel 316L as an anode by means of a monopolar cell at 75 °C, which ran for one month at 300 mA cm−2. Finally, the proposed catalysts showed a total kinetic overpotential of about 550 mV at 75 °C and 1 A cm−2.

scholarly journals Synthesis and Characterization of Ni-Zn-Fe Alloy as an Electrocatalyst for Alkaline Water Electrolysis

2020 ◽  
Vol 190 ◽  
pp. 00036
Author(s):  
Rugi Vicente Del Castillo Rubi ◽  
Marie Angelynne Fabro ◽  
Milton Bianda Dela Rosa ◽  
Maria Angelica Abello Diongson ◽  
Gee Hyun Lee ◽  
...  
Keyword(s):  
Hydrogen Oxidation ◽  
Low Cost ◽  
Electrochemical Behaviour ◽  
Water Electrolysis ◽  
X Ray Diffraction ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Solid Catalysts ◽  
Fe Alloys

Binary alloy of metals is an effective catalyst for hydrogen evolution using water electrolysis. The development of non-noble and low-cost material is very promising used as catalysis. Here, this work focuses on the electrodeposition of Ni-Fe-Zn as electrocatalyst for alkaline water electrolysis. Ni-Zn-Fe was deposited using co-deposition method at various potentials and plating times. The produced electrocatalyst was characterized using X-ray diffraction spectroscopy, and scanning electron microscope. Cyclic voltammetry (CV) was used to characterize the electrochemical behaviour of the alloy in 1.0 M KOH. The metaphase of Ni-Zn-Fe alloys showed in XRD spectra which present the electrodeposits of metal alloys. The SEM spectra captured the agglomerates particle with rougher morphology and larger surface area which highly desirable for solid catalysts. Electrodeposition of the alloy showed that for every increase in voltage corresponds to an increase of 0.12 607 on the mass deposit. CV scan showed the hydrogen oxidation process. The forward and backward passes follow the same trace which indicates that no other reaction is taking place during the first CV scan. These results indicate the excellent catalytic activity of Ni-Zn-Fe electrocatalyst for bright prospect of hydrogen production by alkaline water electrolysis.

scholarly journals Simple and Precise Approach for Determination of Ohmic Contribution of Diaphragms in Alkaline Water Electrolysis

Membranes ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 129 ◽  
Author(s):  
Rodríguez ◽  
Palmas ◽  
Sánchez-Molina ◽  
Amores ◽  
Mais ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Direct Current ◽  
Electrochemical Impedance ◽  
Low Cost ◽  
Water Electrolysis ◽  
Alternating Current ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water

A simple and low-cost alternating current (AC)-based method, without electrolyte correction, is proposed (Electrochemical Impedance Spectroscopy (EIS)-Zero Gap Cell) for the determination of ohmic contribution of diaphragms. The effectiveness of the proposed methodology was evaluated by using a commercial Alkaline Water Electrolysis (AWE) diaphragm (Zirfon®). Furthermore, the results were compared with two conventional electrochemical methodologies for calculating the separator resistance, based on direct current (DC), and AC measurements, respectively. Compared with the previous techniques, the proposed approach reported more accurate and precise values of resistance for new and aged samples. Compared with the manufacturer reference, the obtained error values for new samples were 0.33%, 5.64%, and 41.7%, respectively for EIS-Zero gap cell, AC and DC methods, confirming the validity and convenience of the proposed technique.

Molybdenum Carbide Nanoparticles on Carbon Nanotubes and Carbon Xerogel: Low-Cost Cathodes for Hydrogen Production by Alkaline Water Electrolysis

ChemSusChem ◽  
2016 ◽  
Vol 9 (10) ◽  
pp. 1200-1208 ◽  
Author(s):  
Biljana Šljukić ◽  
Diogo M. F. Santos ◽  
Milica Vujković ◽  
Luís Amaral ◽  
Raquel P. Rocha ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Production ◽  
Molybdenum Carbide ◽  
Low Cost ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Carbon Xerogel ◽  
Alkaline Water

Modelling and control of an alkaline water electrolysis process

2018 ◽  
Vol 1 (2) ◽  
pp. 9-14
Author(s):  
Marisol Cervantes-Bobadilla ◽  
Ricardo Fabricio Escobar Jiménez ◽  
José Francisco Gómez Aguilar ◽  
Tomas Emmanuel Higareda Pliego ◽  
Alberto Armando Alvares Gallegos
Keyword(s):  
Process Model ◽  
Water Electrolysis ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water ◽  
Electrolysis Process ◽  
Linear Dynamic ◽  
Energy Current ◽  
Identification Technique ◽  
Nonlinear Static ◽  
And Control

In this research, an alkaline water electrolysis process is modelled. The electrochemical electrolysis is carried out in an electrolyzer composed of 12 series-connected steel cells with a solution 30% wt of potassium hydroxide. The electrolysis process model was developed using a nonlinear identification technique based on the Hammerstein structure. This structure consists of a nonlinear static block and a linear dynamic block. In this work, the nonlinear static function is modelled by a polynomial approximation equation, and the linear dynamic is modelled using the ARX structure. To control the current feed to the electrolyzer an unconstraint predictive controller was implemented, once the unconstrained MPC was simulated, some restrictions are proposed to design a constrained MPC (CMPC). The CMPC aim is to reduce the electrolyzer's energy consumption (power supply current). Simulation results showed the advantages of using the CMPC since the energy (current) overshoots are avoided.

scholarly journals Boosting alkaline water electrolysis by asymmetric temperature modulation

2021 ◽  
Vol 119 (1) ◽  
pp. 013901
Author(s):  
Qinpeng Zhu ◽  
Peihua Yang ◽  
Tao Zhang ◽  
Zehua Yu ◽  
Kang Liu ◽  
...  
Keyword(s):  
Water Electrolysis ◽  
Temperature Modulation ◽  
Alkaline Water Electrolysis ◽  
Alkaline Water
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