Investigation of Ni-Mo and Co-Mo alloys electrodeposition involving choline chloride based ionic liquids

Costovici, Stefania; Manea, Adrian-Cristian; Visan, Teodor; Anicăi, Liana

doi:10.1016/j.electacta.2016.04.173

Cited by 65 publications

(35 citation statements)

References 61 publications

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“…The potential was initially scanned in the cathodic direction, as indicated by the arrow. As can be seen, these CVs are very similar to each other regardless of the sources of Co(II), except that the reductive and stripping peaks of the Co(II)/Co redox couple [27][28][29] are slightly higher in the CoSO 4 solutions than those observed in the solutions containing the anodically-dissolved Co(II). Additionally, the stripping peaks are sharper and occur at a more negative potential in the CoSO 4 solutions.…”

Section: Methodssupporting

confidence: 48%

Electrodeposition and Characterization of CoP Compounds Produced from the Hydrophilic Room-Temperature Ionic Liquid 1-Butyl-1-Methylpyrrolidinium Dicyanamide

Chiu

Sun

Chen

2017

J. Electrochem. Soc.

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The voltammetric behaviors of Co(II), H 2 PO 2 − , and their mixtures in four molar ratios were studied in the hydrophilic roomtemperature ionic liquid (RTIL) 1-butyl-1-methylpyrrolidinium dicyanamide ([BMP][DCA]). Co(II) was introduced into the RTIL via Co-metal anodization or the addition of CoSO 4 , respectively, while NaH 2 PO 2 was used as the H 2 PO 2 − source. A single redox couple of Co(II)/Co was observed in the RTIL containing Co(II). Although elemental phosphorus (P) cannot be directly electrodeposited from NaH 2 PO 2 , CoP was successfully obtained via potentiostatic electrodeposition from [BMP][DCA] containing both CoSO 4 and NaH 2 PO 2 . The obtained Co and CoP electrodeposits were both characterized to study the effects of electrodeposition potential on their surface morphology, elemental composition, crystallinity, and electrocatalytic activity. The as-deposited Co and CoP both showed amorphous features in X-ray diffraction analysis, and crystalline diffraction signals were observed after they were annealed at 623 K for 2 hours. The crystalline structures of the as-deposited CoP, however, were observed using high-resolution TEM, indicating a nanometer-domain crystal size. The oxygen evolution reaction (OER) was studied at the Pt electrode, Co-, and CoP-coated copper electrodes, of which the Co ∼70 P 30∼ electrode showed the best electrocatalytic activity toward OER. Electrodeposition is a very important and diversified technique for preparing a variety of materials, including various metals, alloys, and compounds (metal-nonmetal or nonmetal-nonmetal). Compared with other approaches, electrodeposition is usually simpler, and more economical, efficient, and appropriate for the preparation of materials in large-scale and/or large-area. According to these advantages, electrocatalysts, including cobalt phosphide (CoP), have recently and extensively been prepared via electrodeposition.CoP has been traditionally prepared as magnetic materials via electrodeposition.1-4 However, CoP has recently been recognized as a very important low-cost, efficient, and bifunctional electrocatalyst because it contains relatively abundant elements without noble metals, and can be simultaneously used as the cathode and anode in electrochemical water-splitting cells. CoP has thus become increasingly studied for use in both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), in both acidic and basic solutions. Various approaches have also been developed for the preparation of CoP. Although it has been recently reported that CoP can be formed chemically via phosphidation of a cubic Co precursor,5 electrodeposition is perhaps the ideal approach for the preparation of electrocatalysts due to their straightforward formation on the conductive substrates, which can then be directly used as the electrodes for electrocatalytic reactions. Moreover, no additional and complex processes for catalysts immobilization are needed. Electrodeposition of CoP via a single or multiple step(s) has thus been broadly studied...

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Section: Methodssupporting

confidence: 48%

Electrodeposition and Characterization of CoP Compounds Produced from the Hydrophilic Room-Temperature Ionic Liquid 1-Butyl-1-Methylpyrrolidinium Dicyanamide

Chiu

Sun

Chen

2017

J. Electrochem. Soc.

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“…On the contrary, Mo-based alloys are difficult to obtain in a wide composition range due to the inertness of molybdenum. The use of DES to obtain these alloys, also in this case promising for corrosion protection, can extend the compositional range with respect to water solutions (like in the case of NiMo and CoMo [90]). Always in the field of Zn-based materials, ZnSn is a particular case of alloy that can be deposited in water but present some advantages when plated in DESs.…”

Section: Industrial Applicability Of Alloys Deposition From Dessmentioning

confidence: 99%

Electrodeposition from Deep Eutectic Solvents

Bernasconi¹,

Panzeri²,

Accogli³

et al. 2017

Progress and Developments in Ionic Liquids

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Deep eutectic solvents constitute a class of compounds sharing many similarities with properly named ionic liquids. The accepted deinition of ionic liquid is a luid liquid for T< °C) consisting of ions, while DES are eutectic mixtures of Lewis or "rønsted acids and bases. Their most atractive properties are the wide potential windows and the chemical properties largely diferent from aqueous solutions. In the last few decades, the possibility to electrodeposit decorative and functional coatings employing deep eutectic solvents as electrolytes has been widely investigated. " large number of the deposition procedures described in literature, however, cannot ind application in the industrial practice due to competition with existing processes, cost or diicult scalability. From one side, there is the real potential to replace existing plating protocols and to ind niche applications for high added-value productions to the other one, this paves the path towards the electrodeposition of metals and alloys thermodynamically impossible to be obtained via usual aqueous solution processes. The main aim of this chapter is therefore the critical discussion of the applicability of deep eutectic solvents to the electrodeposition of metals and alloys, with a particular atention to the industrial and applicative point of view.Keywords: electrodeposition, deep eutectic solvents, metals, alloys . IntroductionThe electrodeposition of metals for industrial surface inishing is nowadays a well-established industrial practice. Many processes are available to obtain a wide variety of coatings on most of © 2017 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.© 2017 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. the substrates used in manufacturing. There are however some important limitations, as not all the metal/substrate combinations are possible in the current state of the art. This is connected to the nature of the electrolytes used for the vast majority of the plating processes, which are water based. Water is the most obvious choice to formulate a plating electrolyte, and in the majority of the cases, it is also the most convenient from the point of view of the results obtained. This solvent however presents some limitations: narrow potential window, reactivity towards speciic metals, high hydrogen evolution in speciic conditions, etc. If metal plating is limited to aqueous solutions, many possibilities are therefore precluded." possible way to extend the range of coating/substrate combinations is the use of non-aqueous solvents, characterized by ext...

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“…Deep eutectic solvents (DESs) are green solvents that consist of a quaternary ammonium salt as a hydrogen bond acceptor and a hydrogen bond donor . Owing to the easy preparation , good bio‐compatibility , low volatility, low toxicity, low cost, and high biodegradability, DESs were introduced to the synthesis of MIPs to improve the affinity and selectivity of the polymers .…”

Section: Introductionmentioning

confidence: 99%

Magnetic molecularly imprinted polymers based on silica modified by deep eutectic solvents for the rapid simultaneous magnetic‐based solid‐phase extraction of Salvia miltiorrhiza bunge, Glycine max (Linn.) Merr and green tea

Wang

Row

2018

Electrophoresis

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Novel magnetic molecularly imprinted polymers (MMIPs) with multiple-template based on silica were modified by four types of deep eutectic solvents (DESs) for the rapid simultaneous magnetic solid-phase extraction (MSPE) of tanshinone Ⅰ, tanshinone ⅡA, and cryptotanshinone from Salvia miltiorrhiza bunge; glycitein, genistein, and daidzein from Glycine max (Linn.) Merr; and epicatechin, epigallocatechin gallate, and epicatechin gallate from green tea, respectively. The synthesized materials were characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. Single factor experiments were to explore the relationship between the extraction efficiency and four factors (the sample solution pH, amount of DESs for modification, amount of adsorbent, and extraction time). It was showed that the DES4-MMIPs have better extraction ability than the MMIPs without DESs and the other three DESs-modified MMIPs. The best extraction recoveries with DES4-MMIP were tanshinone Ⅰ (85.57%), tanshinone ⅡA (80.58%), cryptotanshinone (92.12%), glycitein (81.65%), genistein (87.72%), daidzein (92.24%), epicatechin (86.43%), epigallocatechin gallate (80.92%), and epicatechin gallate (93.64%), respectively. The novel multiple-template MMIPs materials modified by DES for the rapid simultaneous MSPE of active compounds were proved to reduce the experimental steps than single-template technique, and increase the extraction efficiency.

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Investigation of Ni-Mo and Co-Mo alloys electrodeposition involving choline chloride based ionic liquids

Cited by 65 publications

References 61 publications

Electrodeposition and Characterization of CoP Compounds Produced from the Hydrophilic Room-Temperature Ionic Liquid 1-Butyl-1-Methylpyrrolidinium Dicyanamide

Electrodeposition and Characterization of CoP Compounds Produced from the Hydrophilic Room-Temperature Ionic Liquid 1-Butyl-1-Methylpyrrolidinium Dicyanamide

Electrodeposition from Deep Eutectic Solvents

Magnetic molecularly imprinted polymers based on silica modified by deep eutectic solvents for the rapid simultaneous magnetic‐based solid‐phase extraction of Salvia miltiorrhiza bunge, Glycine max (Linn.) Merr and green tea

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