Electrocatalytic Materials of NiCoRe Electrodeposited Alloy for Alkaline Water Electrolysis

Pashova, Veselina; Mirkova, L.; Monev, M.

doi:10.1149/1.3414032

Cited by 6 publications

(5 citation statements)

References 19 publications

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“…Ni-based alloys mixed with Zn, P, Mo, V, W, and Fe are reported as a way of developing Ni electrodes used for hydrogen and oxygen reactions. 172 These materials have lower overpotential concerning the HER compared with Ni electrodes, related to the higher active surface area. However, nickel alloys must be used with caution, as easy oxidation to Ni 2+ can proceed.…”

Section: Rhenium Metal Alloysmentioning

confidence: 99%

Rhenium-Based Electrocatalysts for Water Splitting

et al. 2023

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Due to the contamination and global warming problems, it is necessary to search for alternative environmentally friendly energy sources. In this area, hydrogen is a promising alternative. Hydrogen is even more promising, when it is obtained through water electrolysis operated with renewable energy sources. Among the possible devices to perform electrolysis, proton exchange membrane (PEM) electrolyzers appear as the most promising commercial systems for hydrogen production in the coming years. However, their massification is affected by the noble metals used as electrocatalysts in their electrodes, with high commercial value: Pt at the cathode where the hydrogen evolution reaction occurs (HER) and Ru/Ir at the anode where the oxygen evolution reaction (OER) happens. Therefore, to take full advantage of the PEM technology for green H 2 production and build up a mature PEM market, it is imperative to search for more abundant, cheaper, and stable catalysts, reaching the highest possible activities at the lowest overpotential with the longest stability under the harsh acidic conditions of a PEM. In the search for new electrocatalysts and considering the predictions of a Trasatti volcano plot, rhenium appears to be a promising candidate for HER in acidic media. At the same time, recent studies provide evidence of its potential as an OER catalyst. However, some of these reports have focused on chemical and photochemical water splitting and have not always considered acidic media. This review summarizes rhenium-based electrocatalysts for water splitting under acidic conditions: i.e., potential candidates as cathode materials. In the various sections, we review the mechanism concepts of electrocatalysis, evaluation methods, and the different rhenium-based materials applied for the HER in acidic media. As rhenium is less common for the OER, we included a section about its use in chemical and photochemical water oxidation and as an electrocatalyst under basic conditions. Finally, concluding remarks and perspectives are given about rhenium for water splitting.

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Section: Rhenium Metal Alloysmentioning

confidence: 99%

Rhenium-Based Electrocatalysts for Water Splitting

et al. 2023

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“…The hydrogen overvoltage on both electrodes is much lower than the value of the overvoltage on a pure Ni electrode. A Ni alloy with a low content of Re (Ni/Re57-Co37) exhibits better elec-tro-catalytic properties [102]. Binary nickelsilver alloys of different composition having a higher activity than the pure nickel in the hydrogen evolution process were synthesized.…”

Section: Chemical Problems 2018 No 3 (16)mentioning

confidence: 99%

Electrocatalysts for Water Electrolysis

Aliyev¹,

Guseynova²,

Gurbanova³

et al. 2018

Chemical Problems

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The review paper accumulates the latest information on the analysis of catalyst synthesis for the electrolysis of water in alkaline and partially in acidic media. Literature data on the production of electro-catalysts based on noble, refractory, transition and pure metals, as well as metals doped with molybdenum, phosphorus, and other elements, are presented. Given the different methods of synthesis of electro-catalyst, the advantage of the electrochemical method is emphasized as easy, accessible method enabling to regulate the composition of synthesized electrodes by changing the content of an electrolyte and the conditions of electrolysis, controlling the properties of synthesized materials.

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“…The practical significance of research in this area is associated mainly with the growth in the production of rhenium and, consequently, with the need to address the issue of the optimal technology for the separation of rhenium from solutions in the form of pure metal or alloys. In addition, it is required to find the possibilities of using rhenium and its alloys as galvanic coatings for various purposes [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical obtaining of rhenium-molybdenum alloys

Salakhova,

Tagiyev,

Kalantarova

et al. 2023

J. Electrochem. Sci. Eng.

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Based on the study of current-voltage dependences during the co-deposition nt electrical reduction of rhenium and molybdenum from sulfuric acid on a Pt electrode, conditions for deposition of alloy nanocoatings of the Re-Mo system were established. The influence of various factors, such as the content of components in the electrolyte, current density, temperature, acidity of solutions, etc., on the composition and quality of coatings was studied. It was established that with an increase in the content of rhenium in the electrolyte and increase of current density, the content of rhenium in the alloy is increased. The composition and morphology of Re-Mo thin films electrodeposited on a platinum electrode were analyzed. The phase composition of the obtained films was determined by XRD using a diffractometer, and the study of the morphology of Re-Mo films on platinum and nickel substrates was performed using a scanning electron microscope. Based on this study, the optimal conditions for the deposition molybdenum with rhenium and the required composition of the electrolyte were selected. For the obtaining rhenium-molybdenum alloys containing 50-80 wt.% Re, the following electrolyte composition can be recommended: 0.0015M Na2MoO4 + 0.0035M KReO4 + 2M H2SO4, pH 0.4; t = 75°C, electrode - Pt.

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Electrocatalytic Materials of NiCoRe Electrodeposited Alloy for Alkaline Water Electrolysis

Cited by 6 publications

References 19 publications

Rhenium-Based Electrocatalysts for Water Splitting

Rhenium-Based Electrocatalysts for Water Splitting

Electrocatalysts for Water Electrolysis

Electrochemical obtaining of rhenium-molybdenum alloys

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