Ni alloy nanowires as high efficiency electrode materials for alkaline electrolysers

Ganci, Fabrizio; Patella, Bernardo; Cannata, E.; Cusumano, Valentino; Aiello, Giuseppe; Sunseri, C.; Mandin, Philippe; Inguanta, Rosalinda

doi:10.1016/j.ijhydene.2020.11.208

Cited by 22 publications

(10 citation statements)

References 86 publications

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“…This ensures a better evolution of the hydrogen from their surface and, therefore, a better mechanical stability. This hypothesis is confirmed by the good performance obtained with nanostructured Ni-based electrodes fabricated with polycarbonate membranes, that also have a very good mechanical stability [ 56 ].…”

Section: Resultsmentioning

confidence: 79%

“…Furthermore, considering the excellent results obtained in the case of Ni-based nanostructured electrodes for alkaline electrolyzers [ 49 , 50 , 51 ], in this work, the Pd–Co alloys have been obtained in the form of an array of nanowires using alumina membranes (AAM) as the template [ 52 , 53 , 54 , 55 ]. In fact, as demonstrated in [ 56 , 57 , 58 , 59 , 60 , 61 , 62 ], due to the high surface area, the electrodes based on the arrays of nanowires showed very good performance compared to the planar ones. This is generally true for all electrochemical devices with nanostructured electrodes [ 4 , 63 ] such as batteries [ 64 , 65 , 66 ], sensors [ 67 , 68 , 69 , 70 ], supercapacitors [ 71 , 72 , 73 ] and solar cells [ 74 , 75 , 76 ].…”

Section: Introductionmentioning

confidence: 99%

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Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

et al. 2023

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To realize the benefits of a hydrogen economy, hydrogen must be produced cleanly, efficiently and affordably from renewable resources and, preferentially, close to the end-users. The goal is a sustainable cycle of hydrogen production and use: in the first stage of the cycle, hydrogen is produced from renewable resources and then used to feed a fuel cell. This cycle produces no pollution and no greenhouse gases. In this context, the development of electrolyzers producing high-purity hydrogen with a high efficiency and low cost is of great importance. Electrode materials play a fundamental role in influencing electrolyzer performances; consequently, in recent years considerable efforts have been made to obtain highly efficient and inexpensive catalyst materials. To reach both goals, we have developed electrodes based on Pd–Co alloys to be potentially used in the PEMEL electrolyzer. In fact, the Pd–Co alloy is a valid alternative to Pt for hydrogen evolution. The alloys were electrodeposited using two different types of support: carbon paper, to fabricate a porous structure, and anodic alumina membrane, to obtain regular arrays of nanowires. The goal was to obtain electrodes with very large active surface areas and a small amount of material. The research demonstrates that the electrochemical method is an ideal technique to obtain materials with good performances for the hydrogen evolution reaction. The Pd–Co alloy composition can be controlled by adjusting electrodeposition parameters (bath composition, current density and deposition time). The main results concerning the fabrication process and the characterization are presented and the performance in acid conditions is discussed.

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Section: Resultsmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

et al. 2023

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“…[6] In that context, several reports have demonstrated the high efficiency and stability of Ni-based bimetallic electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline medium. [7][8][9][10] In an effort to standardize the evaluation of the catalytic performance of such materials, Jaramillo and co-workers have previously reported a benchmarking study of numerous electrodeposited Ni-based binary alloys incorporating, for example, Co, Cr, Mo, Fe, La, or W. [11] These alloyed materials were easily and quickly prepared from the electrochemical reduction of the two corresponding metallic salts. [11,12] Other groups have also demonstrated that ternary alloys such as NiCoFe, [13,14] NiCoMo, [15,16] NiCrMo, [17] NiFeMo, [18,19] and NiFeCr [20] are excellent candidates for HER and OER.…”

Section: Introductionmentioning

confidence: 99%

Robust and Bifunctional Electrodeposited NiCoCr Ternary Alloy for Alkaline Water Electrolysis

Tourneur,

Lagrost,

Fabre

2023

Adv Energy and Sustain Res

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Electrodeposited NiCoCr ternary alloy is explored as a cost‐effective and Earth‐abundant alternative electrocatalyst for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline conditions. Different metal salt concentrations (between 10 and 100 mM) and cathodic current densities (between 75 and 225 mA cm−2) are tested to prepare an optimized material exhibiting both the best electrocatalytic efficiency and robustness for water splitting. Combining electrochemistry with complementary physicochemical characterizations (scanning electron microscopy, energy‐dispersive X‐ray spectroscopy analysis, and X‐ray photoelectron spectroscopy) has enabled to gain a deep knowledge of the composition, morphology, and catalytic activity before and after long‐term electrolytic tests. Compared with the related NiCo and NiCr binary alloys, NiCoCr shows catalytic performance for HER similar to NiCr and higher than that of NiCo. In contrast, its catalytic activity for OER is quite comparable to that of NiCo and higher than that of NiCr. Importantly, the presence of Cr is found to be beneficial to increase the oxidation resistance of the ternary alloy. This work provides a scalable way to produce bifunctional and robust electrode materials.

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“…For HER, Ni alloys are very suitable, since they prevent the formation of hydrides that deactivate the catalyst surface [26]. In particular, the best alloys are those with other transition metals, such as NiPd [27,28], NiMo [29][30][31], NiZn [32,33], or, even more evidently, with the metals of the iron group, such as NiCo [34][35][36] and NiFe [37]. In addition to the excellent electrocatalytic property and high chemical stability in alkaline media, the latter are known for their mechanical and magnetic properties [38][39][40], making them excellent materials in the field of microelectromechanics.…”

Section: Introductionmentioning

confidence: 99%

Ni-Fe alloy nanostructured electrodes for water splitting in alkaline electrolyser

Buccheri

Ganci

Patella

et al. 2021

Electrochimica Acta

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Ni alloy nanowires as high efficiency electrode materials for alkaline electrolysers

Cited by 22 publications

References 86 publications

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

Pd–Co-Based Electrodes for Hydrogen Production by Water Splitting in Acidic Media

Robust and Bifunctional Electrodeposited NiCoCr Ternary Alloy for Alkaline Water Electrolysis

Ni-Fe alloy nanostructured electrodes for water splitting in alkaline electrolyser

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