Electrodeposited Pd nanoparticles on polypyrole/nickel foam for efficient methanol oxidation

Karazehir, Tolga

doi:10.1016/j.ijhydene.2022.12.059

Cited by 15 publications

(5 citation statements)

References 88 publications

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“…Two semicircles are observed in the Nyquist diagrams of Ni@GCE and Ni@S-rGO/GCE in Figure 6. While the semicircle diameter in the high-frequency region is associated with the electrical conductivity of the electrode, the semicircle diameter in the low frequency is related to the resistance of charge mobility [16]. From Table 1, Ni@S-rGO/GCE has higher conductivity and charge mobility compared to Ni@GCE.…”

Section: Electrochemical Impedance Spectroscopy Measurementmentioning

confidence: 99%

Efficient Methanol Electro-oxidation on Ni, S Dual Doped Reduced Graphene Layer Catalyst

Suna Karatekin,

Kaplan

2023

Cumhuriyet Science Journal

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Energy crisis is the most popular issue in the world, which must be overcome with the development of alternative energy sources. Among them, methanol is a promising fuel when used in direct methanol fuel cells. However, the mentioned cell needs highly electroactive and stable anode materials toward MeOH. Ni has gained attention as it is an alternative to noble atoms. In this study, Ni was deposited on reduced graphene layer which functionalized with S atoms via the hydrothermal method. The fabricated sample was characterized by using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), mapping, X-ray Powder Diffraction (XRD), and Brunauer–Emmett–Teller method (BET). Two samples as called Ni/GCE and Ni@s-rGO/GCE were examined for methanol oxidation reaction in alkaline media. For methanol oxidation, due to the higher surface area, and small particle size of Ni, the mass activity of Ni@s-rGO/GCE is two times higher than Ni/GCE

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Section: Electrochemical Impedance Spectroscopy Measurementmentioning

confidence: 99%

Efficient Methanol Electro-oxidation on Ni, S Dual Doped Reduced Graphene Layer Catalyst

Suna Karatekin,

Kaplan

2023

Cumhuriyet Science Journal

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“…Tolga Karazehir and colleagues describes the Ni foam/polypyrrole/Pd multilayered catalysts via a facile electrochemical technique. [223] Further, self-supported Ir m Ru n O x /Ti electrode exhibiting an amorphous film encapsulated with a small number of crystalline NPs for efficient acidic OER. [224] Meanwhile, RuFe-based catalysts have been synthesized on porous iron foam.…”

Section: Adapt To Electrode Usementioning

confidence: 99%

“…Due to the extensive application of alkaline electrolytic water industry, nickel‐based electrodes are widely used as the matrix structure of high‐performance catalysts. Tolga Karazehir and colleagues describes the Ni foam/polypyrrole/Pd multilayered catalysts via a facile electrochemical technique [223] . Further, self‐supported Ir m Ru n O x /Ti electrode exhibiting an amorphous film encapsulated with a small number of crystalline NPs for efficient acidic OER [224] .…”

Section: Practical Use: Materials Stability and Electrode Activitymentioning

confidence: 99%

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

Chen,

Li,

Zhao

et al. 2024

ChemElectroChem

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In response to the climate goal of achieving carbon neutrality by 2050, efficient electrochemical energy conversion devices are garnering increasing attention. However, the enhancement of electrochemical performance using noble metal electrocatalysts, along with cost reduction and electrode fabrication, remain significant challenges. Noble metal hybrid nanostructures, possessing multiple surface functionalities, lead to outstanding electrocatalytic performances and low‐cost potential. Strain effects can bolster the bonding strength between the noble metal layers and the substrate or core layers, while simultaneously affecting electrocatalytic performance through tuning the binding strength between catalytically active sites and reactants, including intermediates. This review encapsulates the research efforts directed towards improving the performance of noble metal electrocatalysts and provides an overview of the latest advancements in controlling the surface state of noble metals by incorporating a secondary component. We discuss systematic approaches to adjusting surface strain effects on noble metals, characterization techniques, and application case studies, while extracting key design indicators for readers to consider from a macroscopic perspective. Further, we outline the challenges encountered and current solutions when advancing noble metal catalysts from theoretical mechanisms to practical use. Finally, the perspectives on the future research of noble metal surface layer control techniques were also provided.

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“…In another case, the separately prepared polypyrrole suspension was simply deposited in nickel foam [ 9 ]. As an alternative, the nickel foam has been coated with polypyrrole potentiostatically [ 10 , 11 ], at a constant current density [ 12 ] or by using cyclic voltammetry [ 13 , 14 ]. Systems based on nickel foam are applicable, especially as current collectors in supercapacitors where the nickel provides the conductivity as well as the mechanical support for the deposition of polypyrrole [ 4 , 5 , 6 , 7 , 8 , 9 , 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

“…Systems based on nickel foam are applicable, especially as current collectors in supercapacitors where the nickel provides the conductivity as well as the mechanical support for the deposition of polypyrrole [ 4 , 5 , 6 , 7 , 8 , 9 , 15 , 16 , 17 ]. Other diverse applications are represented by electrodes for electrocatalytic oxidation of methanol [ 11 ], improved water-splitting [ 14 , 17 ], solar steam-generation [ 3 , 10 ], solar-thermal desalination [ 18 ], or allowed for controlled electrosorption of organic pollutant dye [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

Conducting and Magnetic Hybrid Polypyrrole/Nickel Composites and Their Application in Magnetorheology

Jurča,

Vilčáková,

Kazantseva

et al. 2023

Materials

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Hybrid organic/inorganic conducting and magnetic composites of core–shell type have been prepared by in-situ coating of nickel microparticles with polypyrrole. Three series of syntheses have been made. In the first, pyrrole was oxidised with ammonium peroxydisulfate in water in the presence of various amounts of nickel and the composites contained up to 83 wt% of this metal. The second series used 0.1 M sulfuric acid as a reaction medium. Finally, the composites with polypyrrole nanotubes were prepared in water in the presence of structure-guiding methyl orange dye. The nanotubes have always been accompanied by the globular morphology. FTIR and Raman spectroscopies confirmed the formation of polypyrrole. The resistivity of composite powders of the order of tens to hundreds Ω cm was monitored as a function of pressure up to 10 MPa. The resistivity of composites slightly increased with increasing content of nickel. This apparent paradox is explained by the coating of nickel particles with polypyrrole, which prevents their contact and subsequent generation of metallic conducting pathways. Electrical properties were practically independent of the way of composite preparation or nickel content and were controlled by the polypyrrole phase. On the contrary, magnetic properties were determined exclusively by nickel content. The composites were used as a solid phase to prepare a magnetorheological fluid. The test showed better performance when compared with a different nickel system reported earlier.

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Electrodeposited Pd nanoparticles on polypyrole/nickel foam for efficient methanol oxidation

Cited by 15 publications

References 88 publications

Efficient Methanol Electro-oxidation on Ni, S Dual Doped Reduced Graphene Layer Catalyst

Efficient Methanol Electro-oxidation on Ni, S Dual Doped Reduced Graphene Layer Catalyst

Advances in Strain‐Induced Noble Metal Nanohybrids for Electro‐Catalysis: From Theoretical Mechanisms to Practical Use

Conducting and Magnetic Hybrid Polypyrrole/Nickel Composites and Their Application in Magnetorheology

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