Electrochemical properties of polyethyleneimine-functionalized Pt-PEI/carbon black as a catalyst for polymer electrolyte membrane fuel cell

Park, S.H.; Yang, Haoran; Lee, D.C.; Park, K.W.; Kim, W.J.

doi:10.1016/j.electacta.2014.01.095

Cited by 10 publications

(5 citation statements)

References 23 publications

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“…The oxidation state of Pt NPs was analyzed and calculated based on the XPS Pt4f spectra, and the results are given in Table 2 . The Pt/S-rGO electrocatalyst shows the highest metallic contents of Pt (i.e., Pt(0)) that is important for MOR 56 . The taurine groups assembled on the rGO frameworks significantly enhances the electrocatalytic activity of Pt NPs and facilitate the transfer of electrons and protons for the MOR.…”

Section: Resultsmentioning

confidence: 99%

Self-assembled platinum nanoparticles on sulfonic acid-grafted graphene as effective electrocatalysts for methanol oxidation in direct methanol fuel cells

2016

Sci Rep

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In this article, sulfonic acid-grafted reduced graphene oxide (S-rGO) were synthesized using a one-pot method under mild conditions, and used as Pt catalyst supports to prepare Pt/S-rGO electrocatalysts through a self-assembly route. The structure, morphologies and physicochemical properties of S-rGO were examined in detail by techniques such as atomic force microscope (AFM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS). The S-rGO nanosheets show excellent solubility and stability in water and the average particle size of Pt nanoparticles supported on S-rGO is ~3.8 nm with symmetrical and uniform distribution. The electrocatalytic properties of Pt/S-rGO were investigated for methanol oxidation reaction (MOR) in direct methanol fuel cells (DMFCs). In comparison to Pt supported on high surface area Vulcan XC-72 carbon (Pt/VC) and Pt/rGO, the Pt/S-rGO electrocatalyst exhibits a much higher electrocatalytic activity, faster reaction kinetics and a better stability. The results indicate that Pt/S-rGO is a promising and effective electrocatalyst for MOR of DMFCs.

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Section: Resultsmentioning

confidence: 99%

Self-assembled platinum nanoparticles on sulfonic acid-grafted graphene as effective electrocatalysts for methanol oxidation in direct methanol fuel cells

2016

Sci Rep

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“…Additionally, there is vast number of possibilities to improve the electrical conductivity of CB composites with tertiary particle structures, to modify the surfaces of CB with hydrophilic or hydrophobic polymers, i.e. hydrophilic poly(sodium-4-styrene sulfonate) [267,268], and pH responsive polymers such as poly(acrylamide-co-vinylamine) [269], for suspending these particles in water, or organic solvents, and dope the surfaces with redox active coatings [133,207,260] to increase the energy storage by pseudocapacitive contribution in EFC [270]. Besides ensuring good electrical conductivity, the ability to tailor interparticle and particle-electrolyte interactions, and potentially slurry viscosity for modulated charge-discharge cycles, further increase interest for CB in emerging energy storage technologies [262,264,270].…”

Section: Supercapacitorsmentioning

confidence: 99%

“…Compared to the same polymer having pores templated by colloidal silica crystal or by emulsion, the CB nanocomposites display similar adsorption and desorption rates, and CB-composite properties could be further improved by maximizing the surface area and porosity. In addition, such polymer grafting method with electrostatically charged groups improved alkali resistance of CB, consequently prolonging the life of the sorbents and retaining their reactivity upon cycling [133,207,260]. These coatings further lead to higher water solubility of functional CB in aqueous and other polar solvents [267][268][269], and enhanced thermochemical stability.…”

Section: Co 2 Storage and Separationsmentioning

confidence: 99%

Carbon black reborn: Structure and chemistry for renewable energy harnessing

Khodabakhshi

Fulvio

Andreoli

2020

Carbon

203

104

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Carbon Black (CB) is one of the most abundantly produced carbon nanostructured materials, and approximately 70% of it is used as pigment and as reinforcing phase in rubber and plastics. Recent scientific findings report on other uses of CB that are of current interest, such as renewable energy harvesting and carbon capture. The present review focuses on the use and role of CB in renewable and environmental applications relevant to contemporary global challenges focusing specifically on clean energy. Key and recent research on the structure and chemistry of CB, including its uses as precursors to graphene quantum dots and hollow carbon spheres, is discussed in relation to renewable energy devices, electrochemical energy storage and environmental remediation. The surface chemistry of CB is closely related to that of graphitic and of turbostratic carbons through the predominant hexagonal carbon lattice from graphene fragments forming its basic structural units. Consequently, modern methods for grafting polymers and functional groups are easily translated to this abundant nanostructured material. Moreover, recent advances in electron microscopy that probe the structure of CB, and its electronic and physicochemical properties in nanocomposites revived the attention of what is wrongfully considered as a scientifically uninspiring material with limited potential for future technology breakthrough. CB has the potential to surge as a key player in renewable energy and environmental applications, meaning "When Black Turns Green".

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“…For further decoration of the Pt nanoparticles, the as‐synthesized oil‐dispersed cube‐CeO 2 ‐COOH nanoparticles were functionalized with polyethyleneimine (PEI) for transfer into the aqueous phase and alteration of the surface charges. Subsequently, the Pt nanoparticles were directly immobilized onto the surface of cube‐CeO 2 ‐NH 2 nanoparticles by means of the polyol reduction process described by Kim and co‐workers, in which ethylene glycol (EG) and [H 2 PtCl 6 ] act as a reducing agent and Pt precursor, respectively. The alcohol groups of EG are oxidized to aldehyde and carboxylic acid functionalities and, at the same time, the electrons donated from EG trigger the reduction of [PtCl 4 ] 2− , which was absorbed on the surface of the cube‐CeO 2 ‐NH 2 nanoparticles through electrostatic interaction.…”

Section: Resultsmentioning

confidence: 99%

Peroxidase‐Mimicking Nanozyme with Enhanced Activity and High Stability Based on Metal–Support Interactions

Yang

et al. 2017

Chemistry A European J

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Peroxidase-mimicking nanozymes offer unique advantages in terms of high stability and low cost over natural peroxidase for applications in bioanalysis, biomedicine, and the treatment of pollution. However, the design of high-efficiency peroxidase-mimicking nanozymes remains a great challenge. In this study, we adopted a structural-design approach through hybridization of cube-CeO and Pt nanoparticles to create a new peroxidase-mimicking nanozyme with high efficiency and excellent stability. Relative to pure cube-CeO and Pt nanoparticles, the as-hybridized Pt/cube-CeO nanocomposites display much improved activities because of the strong metal-support interaction. Meanwhile, the nanocomposites also maintain high catalytic activity after long-term storage and multiple recycling. Based on their excellent properties, Pt/cube-CeO nanocomposites were used to construct high-performance colorimetric biosensors for the sensitive detection of metabolites, including H O and glucose. Our findings highlight opportunities for the development of high-efficiency peroxidase-mimicking nanozymes with potential applications such as diagnostics, biomedicine, and the treatment of pollution.

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Electrochemical properties of polyethyleneimine-functionalized Pt-PEI/carbon black as a catalyst for polymer electrolyte membrane fuel cell

Cited by 10 publications

References 23 publications

Self-assembled platinum nanoparticles on sulfonic acid-grafted graphene as effective electrocatalysts for methanol oxidation in direct methanol fuel cells

Self-assembled platinum nanoparticles on sulfonic acid-grafted graphene as effective electrocatalysts for methanol oxidation in direct methanol fuel cells

Carbon black reborn: Structure and chemistry for renewable energy harnessing

Peroxidase‐Mimicking Nanozyme with Enhanced Activity and High Stability Based on Metal–Support Interactions

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