Evaluation of Raneyânickel cathodes prepared with aluminum powder and tin powder

Tanaka, Shin‐ichi; Hirose, Norimitsu; Tanaki, Toshiyuki

doi:10.1016/s0360-3199(99)00052-x

Cited by 37 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Taking into account HER and OER results, it is important to point out that the present results were in agreement with those presented also by others [27,62,64] and show that OER overpotentials can be twice as large as those for HER [7,80]. As mentioned by Pletcher and Li in 2011 [6], a cell voltage target lower than 2 V at a current density of 1 A cm −2 for a cell operating below 100 °C is already realized.…”

Section: Resultssupporting

confidence: 94%

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

2019

View full text Add to dashboard Cite

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.

show abstract

Section: Resultssupporting

confidence: 94%

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

2019

View full text Add to dashboard Cite

show abstract

“…Finally, the equilibrium potentials in the given conditions were calculated by using the activity coefficients given by Kusik and Meissner 41 to calculate the overpotential, experimental data were fitted by Tafel equation in semi-logarithmic coordinates, and the fitting parameters are reported in Tables I and III. It is important to point out that the present results are in agreement with those presented also by others. 42,43 Validation.-For the present numerical modelling, some simplifying assumptions were necessary. In order to validate the algorithm/ strategy that we have developed, comparisons with experimental results are required.…”

Section: Resultsmentioning

confidence: 99%

“…It is important to point out that the present results are in agreement with those presented also by others. 42,43 Validation.-For the present numerical modelling, some simplifying assumptions were necessary. In order to validate the algorithm/ strategy that we have developed, comparisons with experimental results are required.…”

Section: Resultsmentioning

confidence: 99%

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Colli

Girault

2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

A compact, fast and general algorithm based on Dirichlet boundary conditions for the potential field is derived to enable the calculation of local current distribution, shunt currents and the local potential distribution on massive electrodes in electrochemical cells of any type of geometry in three dimensions, composed of bipolar electrodes at an unknown floating potential and/or terminal monopolar electrodes. The algorithm allows performing the calculation of current-potential distributions and bypass currents for a fixed cell potential (potentiostatic) or a fixed cell current (galvanostatic) enforced to the cell. The proposed approach can be extended to take into account concentration variations of one or several species inside the cell or electrical conductivity variations due to the presence of separators or liquid-gas-solid phases. In order to validate the algorithm, a detailed comparison, between the suggested strategy with experimental results is made in the case of secondary current distribution for i) a segmented one bipolar electrode ii) a cell stack composed of 14 bipolar electrodes in the industrial process of alkaline water electrolysis. The proposed tool can help designers to develop more efficient electrochemical reactors by comparing results using different electrode materials, electrolytes and cell designs. . This paper is part of the JES Focus Issue on Mathematical Modeling of Electrochemical Systems at Multiple Scales in Honor of John Newman. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP E3466 Journal of The Electrochemical Society, 164 (11) E3465-E3472 (2017) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.179.165.12 Downloaded on 2017-07-18 to IP

show abstract

“…The authors emphasized that use of Raney‐Ni, contributed more specific surface area which is 3 times higher than conventional Ni based catalyst. This increment influenced the catalytic capabilities, where hydrogen evolution rate rose significantly concurrently to the improved electrochemical characteristics . In a similar content, Birry et al.…”

Section: Electro‐catalysts For the Hydrogen Evolution Reaction (Her)mentioning

confidence: 86%

“…This increment influenced the catalytic capabilities, where hydrogen evolution rate rose significantly concurrently to the improved electrochemical characteristics. [18] In a similar content, Birry et al described the catalytic superiority of the Raney NiÀ Mo in comparison to pristine Raney-Ni. In this case, the Raney NiÀ Mo was capable of achieving lower hydrogen evolution overpotential with relatively better electrochemical stability than Raney-Ni.…”

Section: Transition Metal and Their Alloys As Her Electro-catalystmentioning

confidence: 98%

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

Zhou

et al. 2020

ChemNanoMat

View full text Add to dashboard Cite

Hydrogen gas has been regarded as an ideal energy source that could replace the need of fossil fuels, based on its high energy density with zero carbon emissions. The production of hydrogen via electrolysis of water is not a new field, but the technology has seen significant advancements in recent times, owing to the proportional growing demand of clean and affordable energy. This review discusses the most recent progresses achieved in the area of earth abundant catalysis, particularly, non‐precious metal (Ni, Co, Fe, Mo, W)‐based catalysts that are being utilized for the electrochemical hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solutions. Based on the type of materials, the discussions are categorized into sections attributed to transition metal alloys, hydroxides, oxides, chalcogenides, carbides and nitrogenous materials. In general, a brief introduction of HER and OER mechanisms followed by a detailed discussion of the presently considered catalysts with endeavors have been made to highlight the new technologies and alternative approaches that are being considered promising towards production of clean H2 energy. Finally, a prospective has been provided to accentuate the future of non‐noble metal based catalyst in electro‐catalytic water splitting reactions.

show abstract

Evaluation of Raneyânickel cathodes prepared with aluminum powder and tin powder

Cited by 37 publications

References 9 publications

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

Contact Info

Product

Resources

About

Evaluation of Raneyânickel cathodes prepared with aluminum powder and tin powder

Cited by 37 publications

References 9 publications

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Compact and General Strategy for Solving Current and Potential Distribution in Electrochemical Cells Composed of Massive Monopolar and Bipolar Electrodes

Recent Advances in Non‐Precious Metal‐Based Electrodes for Alkaline Water Electrolysis

Contact Info

Product

Resources

About

Evaluation of Raneyânickel cathodes prepared with aluminum powder and tin powder