Silver‐Palladium Nanoalloys Modified Carbon Ionic Liquid Electrode with Enhanced Electrocatalytic Activity Towards Formaldehyde Oxidation

Safavi, Afsaneh; Momeni, Safieh; Tohidi, Maryam

doi:10.1002/elan.201200257

Cited by 32 publications

(20 citation statements)

References 36 publications

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“…which are the energy materials for fuel cells. 19,20 Our early work shows that at platinum electrode in bis(trifluoromethylsulfonyl)imide (NTf 2 ) based ILs facile methane electro-oxidation was observed at room temperature in the presence of air, suggesting a unique catalytically active Pt–NTf 2 interface for electron transfer reaction of methane. 21 It is suggested that NTf 2 − can adsorb on the platinum metallic oxide surface 22 and coordinate with platinum to form an organic complex 23 which served as an catalyst for methane oxidation.…”

Section: Introductionmentioning

confidence: 99%

In Situ Generated Platinum Catalyst for Methanol Oxidation via Electrochemical Oxidation of Bis(trifluoromethylsulfonyl)imide Anion in Ionic Liquids at Anaerobic Condition

et al. 2016

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The bis(trifluoromethylsulfonyl)imide anion is widely used as an ionic liquid anion due to its electrochemical stability and wide electrochemical potential window at aerobic conditions. Here we report an innovative strategy by directly oxidizing bis(trifluoromethylsulfonyl)imide anion to form a radical electrocatalyst on platinum electrode at anaerobic condition. The in situ generated radical catalyst was shown to catalytically and selectively promote the electrooxidation of methanol to form methoxyl radical, in which the formation potential was drastically decreased with the existence of bis(trifluoromethylsulfonyl)imide radical. The electrochemically generated radical catalyst not only facilitates the oxidation of methanol but also provides good selectivity. The unique double layer structure of the 1-butyl-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([Bmpy][NTf2]) likely excludes the diffusion of larger molar mass molecules onto the electrode surface and enables the highly selective methanol oxidation at this IL–electrode interface. Cyclic voltammetry (CV) experiments were used to systematically characterize the details of the electrochemical processes with and without methanol in several other ILs, and a mechanism of the chemical and redox processes was proposed. This study provides a promising new approach for utilizing the unique properties of ionic liquids not only as solvents and electrolytes but also as the medium for in situ generation of electrocatalysts to promote methanol redox reactions for practical applications.

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Section: Introductionmentioning

confidence: 99%

In Situ Generated Platinum Catalyst for Methanol Oxidation via Electrochemical Oxidation of Bis(trifluoromethylsulfonyl)imide Anion in Ionic Liquids at Anaerobic Condition

et al. 2016

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“…Pd, Ag and PdAg alloys are catalytically active for a wide range of reactions due to effective absorption and reversible surface reactions with a wide range of species including H2, 12,14,20,36,37 CH2O, 20,23 CH4, 38 and CO. 15,20,39,40 A wide range of hydrogenation, 41 dehydrogenation, 42 oxidation, 20,40,[43][44][45] reduction, 46 and decomposition 20,[47][48][49][50][51] reactions of many organic and some inorganic 46,51 species are catalysed by PdAg. Selectivity for targeted bond scission (such as C-Cl and C-Br) on PdAg surfaces have also been demonstrated.…”

Section: Catalysismentioning

confidence: 99%

“…Selectivity for targeted bond scission (such as C-Cl and C-Br) on PdAg surfaces have also been demonstrated. 52 These catalytic reactions are heterogeneous (gas-solid or liquid-solid) in nature and many are thermally initiated, though numerous examples of PdAg alloys used for electrolysis reactions, 14,23,24,44,47,52 and electro- [53][54][55] and photocatalysis 56 have also been demonstrated. Several reactions particularly suited to use in fuel cells, such as the oxygen reduction reaction (Equation 2) are effectively performed using PdAg electrodes.…”

Section: Catalysismentioning

confidence: 99%

Manufacture, Applications, and Opportunities of Thin Film Palladium-Silver (PdAg) Alloys: A Review

Holdsworth¹

2019

Preprint

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The noble metals palladium and silver find use in many high performance applications, and their alloys (PdAg), known for more than sixty years, are industrially important, finding use in many fields including hydrogen purification and separation, numerous facets of catalysis, and in fuel cells. In recent years, interest in these materials has grown significantly, particularly in energy generating applications and due to their performance as solid-state chemical sensors for a range of small molecules. PdAg thin films can be prepared using traditional physical methods such as cold rolling, or more modern and controllable chemical or physical deposition techniques such as electrodeposition or chemical vapour deposition. Despite the wide-reaching uses of PdAg, several recent advancements in materials preparation, such as additive manufacturing, better known as 3-D printing, remain unexplored for this material due to the differing chemistries of the two elements. In this review, we explore the manufacturing methods commonly employed for the preparation of PdAg thin films, the common and niche applications of these materials, and opportunities for the future development of these two aspects, with an emphasis on how preparation of thin films can utilise additive manufacturing approaches.

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“…Furthermore, the as-prepared Pd nanoparticle-modified carbon ionic liquid electrode (PdNPs/CILE) was employed for the determination of H 2 O 2 via electrochemical reduction by using cyclic voltammetric (CV) and amperometric methods. CILE and nanoparticles modified by CILE have been known to be a very suitable electrode for the oxidation or reduction of a wide range of analytes [38,39]. The results showed that the PdNPs/CILE has high sensitivity and selectivity, wide linear range, and good stability for the determination of H 2 O 2 in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

A Simple Green Synthesis of Palladium Nanoparticles with Sargassum Alga and Their Electrocatalytic Activities Towards Hydrogen Peroxide

Momeni

Nabipour

2015

Appl Biochem Biotechnol

179

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This study presents the synthesis of palladium nanoparticles (PdNPs) using the extract derived from the marine alga, Sargassum bovinum, collected from Persian Gulf area. Water-soluble compounds that exist in the marine alga extract were the main cause of the reduction of palladium ions to Pd nanoparticles. The basic properties of PdNPs produced in this method were confirmed by UV-visible spectroscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), energy-dispersive X-ray (EDX) analysis, and Fourier transform infrared spectroscopy (FTIR). TEM confirmed the monodispersed and octahedral shape of PdNPs within the size ranges from 5 to 10 nm. Catalytic performance of the biosynthetic PdNPs was investigated by electrochemical reduction of hydrogen peroxide (H 2 O 2 ). PdNPmodified carbon ionic liquid electrode (PdNPs/CILE) was developed as a nonenzymatic sensor for the determination of hydrogen peroxide. Amperometric measurements showed that PdNPs/CILE is a reliable sensor for the detection of hydrogen peroxide in the range of 5.0 μM-15.0 mM with a sensitivity of 284.35 mAmM −1 cm −2 and a detection limit of 1.0 μM. Moreover, PdNPs/CILE exhibits a wide linear range, high sensitivity and selectivity, and excellent stability for the detection of H 2 O 2 in aqueous solutions.

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Silver‐Palladium Nanoalloys Modified Carbon Ionic Liquid Electrode with Enhanced Electrocatalytic Activity Towards Formaldehyde Oxidation

Cited by 32 publications

References 36 publications

In Situ Generated Platinum Catalyst for Methanol Oxidation via Electrochemical Oxidation of Bis(trifluoromethylsulfonyl)imide Anion in Ionic Liquids at Anaerobic Condition

In Situ Generated Platinum Catalyst for Methanol Oxidation via Electrochemical Oxidation of Bis(trifluoromethylsulfonyl)imide Anion in Ionic Liquids at Anaerobic Condition

Manufacture, Applications, and Opportunities of Thin Film Palladium-Silver (PdAg) Alloys: A Review

A Simple Green Synthesis of Palladium Nanoparticles with Sargassum Alga and Their Electrocatalytic Activities Towards Hydrogen Peroxide

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