Electroless deposition of Ni–P and Ni–P–Re alloys from acidic hypophosphite baths

Kazimierczak, Honorata; Wierzbicka-Miernik, A.; Kwiecien, Izabella; Szczerba, M.J.; Korneva, Anna; Mosiałek, Michał; Miernik, Krzysztof; Wojewoda-Budka, J.

doi:10.1016/j.electacta.2019.02.057

Cited by 28 publications

(8 citation statements)

References 34 publications

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“…We also tested other aqueous electrolyte solutions for NiP autocatalytic deposition on ZnAl powder. Unfortunately, all of the studied NiP plating baths (pH = 5–10, T = 45–90 °C, with the use of various complexing agents [ 72 , 73 , 74 , 75 ]) gave similar results, yielding low-quality NiP deposits on the thick surface oxide layer. SEM-EDS revealed in all cases Ni-based deposits only partially covering the particles, along with thick and brittle oxide layer, often with some cracks and coating delamination.…”

Section: Resultsmentioning

confidence: 97%

Electrochemical Processing and Thermal Properties of Functional Core/Multi-Shell ZnAl/Ni/NiP Microparticles

et al. 2021

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Electroless deposition on zinc and its alloys is challenging because of the negative standard potential of zinc, the formation of poor surface layers during oxidation in aqueous solutions, and extensive hydrogen evolution. Therefore, there are only few reports of electroless deposition on Zn and its alloys, neither of them on micro/nano powders. Here, we propose a two-step process that allows the formation of compact, uniform, and conformal Ni/NiP shell on Zn-based alloy microparticles without agglomeration. The process utilizes controlled galvanic displacement of Ni deposition in ethanol-based bath, followed by NiP autocatalytic deposition in an alkaline aqueous solution. The mechanism and effect of deposition conditions on the shell formation are discussed. Thermal stability and functional analysis of core-shell powder reveal a thermal storage capability of 98.5% with an encapsulation ratio of 66.5%. No significant morphological change of the core-shell powder and no apparent leakage of the ZnAl alloy through the Ni shell are evident following differential scanning calorimetry tests. Our two-step process paves the way to utilize electroless deposition for depositing metallic-based functional coatings on Zn-based bulk and powder materials.

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Section: Resultsmentioning

confidence: 97%

Electrochemical Processing and Thermal Properties of Functional Core/Multi-Shell ZnAl/Ni/NiP Microparticles

et al. 2021

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“…The effects of temperature, pH, sandpaper size and plating time were investigated for the amount of deposit. There a lot of plating baths in the literature [11][12][13]. The composition of the electroless nickel plating bath solution was given in Table 1.…”

Section: Findings and Discussionmentioning

confidence: 99%

Investigation of the Operating Conditions on Electroless Nickel Plating Over Abs Plastic

Gürmen¹,

Uraz²

2021

NWSA

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“…For example, NiÀ PÀ Re alloys were deposited on a copper substrate at T = 70-100 °C from a bath containing NiSO 4 and NH 4 ReO 4 precursors, hypophosphite as reducing agent and succinate as buffer (pH = 3.0-6.5) and complexing agent. [154] For the same amount of nickel precursor salt introduced in solution, it was shown that the amount of nickel deposited decreased when the amount of rhenium precursor salt was increased. While Ni 0 can only be deposited by reduction of Ni 2 + by hypophosphite, ReO 4 À can be reduced by both hypophosphite and Ni 0 by galvanic replacement, thus explaining the Re 0 deposition at the expense of that of Ni 0 .…”

Section: Other Reducing Agentsmentioning

confidence: 99%

“…While Ni 0 can only be deposited by reduction of Ni 2 + by hypophosphite, ReO 4 À can be reduced by both hypophosphite and Ni 0 by galvanic replacement, thus explaining the Re 0 deposition at the expense of that of Ni 0 . [154] Furthermore, the simultaneous deposition of two metals is complicated by the fact that the precursors may also interact in solution or at the substrate surface, or be reduced at different reaction rates preventing the deposition of alloys with controlled composition. To overcome this difficulty encountered for CuÀ Pt alloys due to the highest reactivity of PtCl 6 2À , a strategy was developed based on the engineering of the ligand shell, and the replacement of chloride ions by ethylenediamine thus decreasing the Pt(IV) reactivity.…”

Section: Other Reducing Agentsmentioning

confidence: 99%

“…Electrodeposition can also be used to deposit two metals together at the surface of a substrate. For example, Ni−P−Re alloys were deposited on a copper substrate at T=70‐100 °C from a bath containing NiSO 4 and NH 4 ReO 4 precursors, hypophosphite as reducing agent and succinate as buffer (pH=3.0‐6.5) and complexing agent [154] . For the same amount of nickel precursor salt introduced in solution, it was shown that the amount of nickel deposited decreased when the amount of rhenium precursor salt was increased.…”

Section: Use Of An Intermediate Reducing Agentmentioning

confidence: 99%

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Bimetallic Catalysts for Sustainable Chemistry: Surface Redox Reactions For Tuning The Catalytic Surface Composition

2023

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The development of a bimetallic catalyst for a given reaction requires not only the selection of the appropriate metals M1 and M2 but also the control as far as possible of the distribution of the two metals together and at the support surface in the case of supported catalysts.Preparation methods using redox reactions specifically enable the deposition of a second metal M2 at the surface of monometallic M1 nanoparticles, leading in most cases to core-shell nanoparticles with strong metal-metal interactions. Various methods are possible depending on the electrochemical potentials of the species involved: either a direct redox reaction, also named galvanic replacement, or the reduction of an intermediate reducing agent activated at the surface of M1. In this minireview, the fundamental bases of the preparation of bimetallic catalysts by both types of redox reactions and the recent advances in that domain are described.

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Electroless deposition of Ni–P and Ni–P–Re alloys from acidic hypophosphite baths

Cited by 28 publications

References 34 publications

Electrochemical Processing and Thermal Properties of Functional Core/Multi-Shell ZnAl/Ni/NiP Microparticles

Electrochemical Processing and Thermal Properties of Functional Core/Multi-Shell ZnAl/Ni/NiP Microparticles

Investigation of the Operating Conditions on Electroless Nickel Plating Over Abs Plastic

Bimetallic Catalysts for Sustainable Chemistry: Surface Redox Reactions For Tuning The Catalytic Surface Composition

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