Electrodeposition of CoNi alloys in a biocompatible DES and its suitability for activating the formation of sulfate radicals

Gómez, Elvira; Fons, Arnau; Cestaro, Roberto; Serrà, Albert

doi:10.1016/j.electacta.2022.141428

Cited by 9 publications

(10 citation statements)

References 53 publications

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“…Following published protocols, metallic CoNi surfaces were fabricated by electrodeposition in a deep eutectic solvent (DES) solution prepared by mixing choline chloride (Across Organics, Geel, Belgium 99%) and urea (Merck, Darmstadt, Germany 99%) in a 1:2 molar ratio at 50 • C under constant stirring. Cobalt (II) chloride and nickel (II) chloride hexahydrate of 99% purity were purchased from Alfa Aesar and Merck, respectively [21,28,29]. Prior to preparing the electroactive solutions, the salts were dried at 105 • C for 24 h until dehydration.…”

Section: Synthesis Of Pms-catalystsmentioning

confidence: 99%

“…Although Co-based oxide nanomaterials are preferred activators of PMS [19,[30][31][32], Cai et al have demonstrated that the synergistic effect between Ni and Co can magnify the catalytic performance of cobalt oxides by increasing the electron transfer for the enhanced breakage of O-O bonds [33]. To investigate the synergistic effect between Ni and Co on the activation of PMS, Co-rich and Ni-rich CoNi (deposits hereinafter referred to as "Co-CoNi" and "Ni-CoNi," respectively) films were subjected to an annealing treatment at 225 • C and 350 • C for 2 h, respectively [21]. The Co-CoNi and Ni-CoNi deposits were synthesized via simple potentiostatic electrochemical deposition in a DES under constant magnetic stirring at 70 • C. The applied potentials were set at −0.95 V and −1.05 V (vs. Ag|AgCl) in order to obtain Ni-and Co-rich micro-nanostructured films with inverse proportions, respectively (Table 1).…”

Section: Synthesis and Characterization Of Pms-catalystsmentioning

confidence: 99%

“…Compared with the Ni-rich deposits, Co-rich deposits presented abundant sharp edges oriented vertically to the surface, which created a large surface area that afforded them more open space and active sites for PMS activation. This kind of architecture may also ensure rapid electron transfer between PMS molecules and active transition metal atoms [21].…”

Section: Synthesis and Characterization Of Pms-catalystsmentioning

confidence: 99%

“…Two different metal proportions were selected to evaluate their effectiveness in activating PMS given that the synergetic effects of both metals could complement CoNi as a good candidate for PMS catalysis [20]. In a previous study addressing the electrochemical preparation of CoNi alloys from a sustainable deep eutectic solvent (DES), as a proof of concept, some alloy compositions have been used as catalysts for activating PMS and showed highly promising results [21]. For a contaminant model, the antibiotic tetracycline (TC) was selected.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced Activation of Peroxymonosulfate for Tetracycline Degradation Using CoNi-Based Electrodeposited Films

et al. 2023

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Synthesizing efficient heterogeneous catalysts with multiple active sites able to activate peroxymonosulfate (PMS) for the degradation of persistent organic pollutants continues to be a challenge for societies worldwide. In response, cost-effective, eco-friendly oxidized Ni-rich and Co-rich CoNi micro-nanostructured films were fabricated following a two-step process based on simple electrodeposition using green deep eutectic solvent as an electrochemical media and thermal annealing. The CoNi-based catalysts demonstrated exceptional efficiency in the heterogeneous catalyzed activation of PMS for tetracycline degradation and mineralization. The effects of the catalysts’ chemical nature and morphology, the pH, the concentration of PMS, irradiation with visible light, and the duration of contact with the catalysts on the degradation and mineralization of tetracycline were also studied. In dark conditions, oxidized Co-rich CoNi degraded more than 99% of tetracyclines in only 30 min and mineralized more than 99% of them in only 60 min. Moreover, the degradation kinetics doubled from 0.173 min−1 in dark conditions to 0.388 min−1 under visible light irradiation. In addition, the material demonstrated excellent reusability and can be easily recovered with simple heat treatment. Given those findings, our work provides new strategies for constructing high-efficiency and cost-effective PMS catalysts and elucidating the effects of operational parameters and primary reactive species formed by the catalyst–PMS system on water treatment technologies.

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Section: Synthesis Of Pms-catalystsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Pms-catalystsmentioning

confidence: 99%

Section: Synthesis and Characterization Of Pms-catalystsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Enhanced Activation of Peroxymonosulfate for Tetracycline Degradation Using CoNi-Based Electrodeposited Films

et al. 2023

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“…Several studies have proved the use of DES for the electrodeposition of bimetallic nanostructures in the last years: CuAu, [41] CoPt, [43] CuIn, [44] CoNi, [45] PdAu, [42] CuGa, [46] CuZn [47] and ZnNi [48] . In one of our previous works, we prepared CuAu nanostructures with tunable morphology and composition by electrodeposition from DES [41] .…”

Section: Introductionmentioning

confidence: 99%

Preparation of Tunable Cu−Ag Nanostructures by Electrodeposition in a Deep Eutectic Solvent

Plaza‐Mayoral,

Dalby,

Falsig

et al. 2024

ChemElectroChem

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The green transition requires new, clean, inexpensive, and sustainable strategies to prepare controllable bimetallic and multimetallic nanostructures. Cu−Ag nanostructures, for example, are promising bimetallic catalysts for different electrocatalytic reactions such as carbon monoxide and carbon dioxide reduction. In this work, we present the one‐step preparation method of electrodeposited Cu−Ag with tunable composition and morphology from choline chloride plus urea deep eutectic solvent (DES), a non‐toxic and green DES. We have assessed how different electrodeposition parameters affect the morphology and composition of our nanostructures. We combine electrochemical methods with ex‐situ scanning electron microscopy (SEM), energy dispersive X‐ray spectroscopy (EDS), and X‐ray photoelectron spectroscopy (XPS) to characterize the nanostructures. We have estimated the electrochemically active surface area (ECSA) and roughness factor (R) by lead underpotential deposition (UPD). The copper/silver ratio in the electrodeposited nanostructures is highly sensitive to the applied potential, bath composition, and loading. We observed that silver‐rich nanostructures were less adherent whereas the increase in copper content led to more stable and homogenous films with disperse rounded nanostructures with tiny spikes. These spikes were more stable when the deposition rate was fast enough and the molar ratio of Cu and Ag was no greater than approximately two to one.

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Wireless pulsed nanophotoelectrochemical cell for the ultrafast degradation of organic pollutants

Serrà,

Gómez,

al Hoda al Bast

et al. 2024

Chemical Engineering Journal

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Electrodeposition of CoNi alloys in a biocompatible DES and its suitability for activating the formation of sulfate radicals

Cited by 9 publications

References 53 publications

Enhanced Activation of Peroxymonosulfate for Tetracycline Degradation Using CoNi-Based Electrodeposited Films

Enhanced Activation of Peroxymonosulfate for Tetracycline Degradation Using CoNi-Based Electrodeposited Films

Preparation of Tunable Cu−Ag Nanostructures by Electrodeposition in a Deep Eutectic Solvent

Wireless pulsed nanophotoelectrochemical cell for the ultrafast degradation of organic pollutants

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