Metallurgically prepared NiCu alloys as cathode materials for hydrogen evolution reaction

Wang, Kunchan; Xia, Ming; Xiao, Tao; Lei, Ting; Yan, Weishan

doi:10.1016/j.matchemphys.2016.10.029

Cited by 34 publications

(14 citation statements)

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“…Several other materials were taken in consideration for comparison, but not directly tested: Ni dendrites [28]; Ni-rare earth alloys [29]; NiCu compact, porous [30,31], metallurgical, and dealloyed [32,33,34,35,36,37,38]; Ni-Co-W [39]; NiCuZnB [40] smooth [22,31,41,42] and porous [43,44,45,46]; NiCo by electroless-plating deposition [47]; Ni-Co [41,43,45]; Ni-Fe [22]; in situ activation of Ni-Co with Mo [48]; electrodeposited Ni-Co-Mo; NiMo [49]; NiCoZn alloys [50,51,52]; Raney-Co [44]; Ni-Mo [53]; nonporous cauliflower-like cobalt-nickel hydroxide (CoNi) [54]; and black nickel (Ni-S) [12]. However, since their results were worse than the materials tested in this work, and the conditions of the experiments were too different from our experiments (low electrolyte concentration or uncertain equilibrium potential correction), only some of their results were summarized in Table 1, Table 2 and Table 3.…”

Section: Resultsmentioning

confidence: 99%

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

2019

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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.

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Section: Resultsmentioning

confidence: 99%

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

2019

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“…40,41 For the NiCu alloy foam, the XRD pattern in Figure 2D shows that the diffraction peaks related to (111), (200), and (220) of metallic Ni shift toward lower angles with increase of Cu content. 42 This change is because the atomic radius of Cu (1.278 Å) is larger than that of Ni (1.245 Å). By further increasing Cu content and decreasing Ni content to zero, the characteristic peaks of Ni are entirely transformed to the peaks of Cu.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Considering the little higher electronegativity of nickel over copper, the electron transfer from Cu to Ni is possible, leading to an increase of the electronic density around Ni atoms, which in turn provides preferable sites for the HER. 42 Table S2 compares the catalytic performances of various non-noble metal electrocatalysts in the alkaline solutions, which reveals the superior catalytic performances of the NiCo and NiCu alloy foams. OER Electrocatalysis.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Fabrication of Three-Dimensional Multiscale Porous Alloy Foams at a Planar Substrate for Efficient Water Splitting

Tian

Liu

et al. 2019

ACS Sustainable Chem. Eng.

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The electrolysis of water to produce hydrogen and oxygen is a simple and attractive approach to store renewable energies in the form of chemical fuels, in which the key fact depends on the innovative exploration of high-performance electrocatalysts. Herein, we describe a novel electrochemical deposition method for synthesizing three-dimensional NiCo, NiCu, and CoCu alloy foams at a planar electrode substrate for the hydrogen evolution reaction (HER) and NiFe alloy foam for the oxygen evolution reaction (OER). The electrodes are composed of multiscale porous structure caused by concomitant hydrogen gas bubbles evolved during cathodic deposition. The unique electrode structure is beneficial for exposing more catalytic active sites, enhancing mass transport, and accelerating dissipation of gas bubbles generated during water electrolysis. The twoelectrode alkaline water electrolyzers constructed with these alloy foams can afford a current density of 400 mA cm −2 at a cell voltage of 1.73 V for Ni 30 Fe||NiCo and at 1.71 V for Ni 30 Fe||NiCu and exhibit excellent durability in prolonged bulk electrolysis. The strategy developed in this study highlights construction of three-dimensional, multiscale porous electrocatalysts at a planar electrode substrate which is significant for catalysis application.

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“…Therefore, researchers are working on nickel-based electrodes that are cheaper than platinum for the HER. 22 Many methods such as sintering, vacuum and plasma sprayed deposition, and electrodeposition are used in the production of nickel-based alloys. 23,24 General support materials of these systems are nickel foam, C-felt, 25 stainless steel, and graphite.…”

Section: Introductionmentioning

confidence: 99%

“…However, platinum is more expensive material compare with other transition metals. Therefore, researchers are working on nickel‐based electrodes that are cheaper than platinum for the HER 22 . Many methods such as sintering, vacuum and plasma sprayed deposition, and electrodeposition are used in the production of nickel‐based alloys 23,24 .…”

Section: Introductionmentioning

confidence: 99%

The snowflake‐like structured NiO‐Cu ₂ O @Fe/Ru catalyst for hydrogen fuel production

Farsak

Aydın

2020

Int J Energy Res

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The hydrogen production researches as an alternative for fossil fuels, significantly increase in recent years. To obtain pure hydrogen, researches are focused on the electrolysis of water. One of the most important parts of these studies is to develop cathode material. In this study, electrodes are prepared by rolling slurry contained copper (I) oxide (Cu 2 O) and nickel (II) oxide (NiO) on a graphite support material. Then, iron (Fe) is electrochemically deposited on the prepared electrode. Finally, ruthenium (Ru) is doped electrochemically. Electrochemical impedance spectroscopy, cyclic voltammetry, chronoamperometry, and linear sweep voltammetry techniques are taken for each electrode. Scanning electron microscopy (SEM) and X-ray diffraction analyses are performed for surface characterization. SEM pictogram shows the snowflake-like structure for the best catalyst. It is found that the best molar ratio for Cu 2 O-NiO is 2:1, the best deposition times are 10 minutes and 30 seconds for Fe and Ru, respectively.

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Metallurgically prepared NiCu alloys as cathode materials for hydrogen evolution reaction

Cited by 34 publications

References 34 publications

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Fabrication of Three-Dimensional Multiscale Porous Alloy Foams at a Planar Substrate for Efficient Water Splitting

The snowflake‐like structured NiO‐Cu ₂ O @Fe/Ru catalyst for hydrogen fuel production

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Metallurgically prepared NiCu alloys as cathode materials for hydrogen evolution reaction

Cited by 34 publications

References 34 publications

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Non-Precious Electrodes for Practical Alkaline Water Electrolysis

Fabrication of Three-Dimensional Multiscale Porous Alloy Foams at a Planar Substrate for Efficient Water Splitting

The snowflake‐like structured NiO‐Cu 2 O @Fe/Ru catalyst for hydrogen fuel production

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The snowflake‐like structured NiO‐Cu ₂ O @Fe/Ru catalyst for hydrogen fuel production