Electrospun carbon nanofiber-supported Pt–Pd alloy composites for oxygen reduction

Carbon nanofiber-supported Pt–Pd alloy composites were prepared by co-electrodepositing Pt–Pd alloy nanoparticles directly onto electrospun carbon nanofibers. The morphology and size of Pt–Pd alloy nanoparticles were controlled by the surface treatment of carbon nanofibers and the electrodeposition duration time. Scanning electron microscopy/energy dispersive spectrometer (SEM)/(EDS) and x-ray photoelectron spectroscopy (XPS) were used to study the composition of Pt–Pd alloy on the composites, and the co-electrodeposition mechanism of Pt–Pd alloy was investigated. The resultant Pt–Pd/carbon nanofiber composites were characterized by running cyclic voltammograms in oxygen-saturated 0.1 M HClO4 at 25 °C to study their electrocatalytic ability to reduce oxygen. Results show that Pt–Pd/carbon nanofiber composites possess good performance in the electrocatalytic reduction of oxygen. Among all Pt–Pd/carbon nanofibers prepared, the nanofiber composite with a Pt–Pd loading of 0.90 mg/cm2 has the highest electrocatalytic activity by catalyst mass.

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A graphene/nitrogen-doped carbon nanofiber composite as an anode material for sodium-ion batteries

RSC Advances ◽

10.1039/c5ra19548a ◽

2015 ◽

Vol 5 (127) ◽

pp. 104822-104828 ◽

Cited By ~ 18

Author(s):

Juan Zhang ◽

Zhian Zhang ◽

Xingxing Zhao

Keyword(s):

Anode Material ◽

Carbon Nanofibers ◽

Porous Carbon ◽

Carbon Nanofiber ◽

Sodium Ion ◽

Sodium Ion Batteries ◽

Nanofiber Composite ◽

Nitrogen Doped ◽

Porous Carbon Nanofiber ◽

Nitrogen Doped Carbon

A graphene/N-doped porous carbon nanofiber (RGO/NPC) composite was designed as an anode material for sodium-ion batteries (SIBs). A microstructure of fine and uniform N-doped porous carbon nanofibers decorated on 2D RGO sheets was obtained.

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Nanocavity-engineered Si/multi-functional carbon nanofiber composite anodes with exceptional high-rate capacities

Journal of Materials Chemistry A ◽

10.1039/c4ta04257c ◽

2014 ◽

Vol 2 (42) ◽

pp. 17944-17951 ◽

Cited By ~ 31

Author(s):

Zheng-Long Xu ◽

Biao Zhang ◽

Sara Abouali ◽

Mohammad Akbari Garakani ◽

Jiaqiang Huang ◽

...

Keyword(s):

Carbon Nanofibers ◽

Carbon Nanofiber ◽

High Rate ◽

Nanofiber Composite ◽

Electrospinning Method ◽

Li Ion ◽

Composite Anodes

Multi-functionalized carbon nanofibers containing nanocavity-engineered Si particles as durable high-rate Li-ion anodes were fabricated via a facile electrospinning method.

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Carbon nanofiber modified with osmium based redox polymer for glucose sensing

Journal of Electrochemical Science and Engineering ◽

10.5599/jese.422 ◽

2017 ◽

Vol 7 (4) ◽

pp. 181-191 ◽

Cited By ~ 1

Author(s):

Amos Mugweru ◽

Reaz Mahmud ◽

Kartik Ghosh ◽

Adam Wanekaya

Keyword(s):

Glucose Oxidase ◽

Carbon Nanofibers ◽

Carbon Nanofiber ◽

Energy Dispersive Spectrometer ◽

High Sensitivity ◽

Glucose Sensing ◽

Redox Polymer ◽

Glucose Determination ◽

Km Value ◽

Oxidase Enzyme

Electrochemical detection of glucose was performed on carbon nanofibers containing an osmium based redox polymer and using glucose oxidase enzyme. Redox polymer assembled on the nanofibers provided a more stable support that preserved enzyme activity and promoted the electrical communication to the glassy carbon electrode. The morphologies, structures, and electrochemical behavior of the redox polymer modified nanofibers were characterized by scanning electron microscope, energy dispersive spectrometer and voltammetry. The glucose oxidase showed excellent communication with redox polymer as observed with the increased activity toward glucose. Both cyclic voltammetry and amperometry showed a linear response with glucose concentration. The linear range for glucose determination was from 1 to 12 mM with a relatively high sensitivity of 0.20±0.01 μA mM−1 for glucose oxidase in carbon nanofibers and 0.10±0.01 μA mM−1 without carbon nanofibers. The apparent Michaelis–Menten constant (Km) for glucose oxidase with carbon nanofibers was 0.99 mM. On the other hand, the Km value for the glucose oxidase without the nanofibers was 4.90 mM.

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Poly Lactic-Co-Glycolic Acid Carbon Nanofiber Composite for Enhancing Cardiomyocyte Function

MRS Proceedings ◽

10.1557/opl.2011.663 ◽

2011 ◽

Vol 1316 ◽

Cited By ~ 1

Author(s):

David A. Stout ◽

Jennie Yoo ◽

Thomas J. Webster

Keyword(s):

Tissue Engineering ◽

Carbon Nanofibers ◽

Glycolic Acid ◽

Carbon Nanofiber ◽

Myocardial Tissue ◽

Engineering Applications ◽

Nanofiber Composite ◽

Human Cardiomyocytes ◽

Myocardial Tissue Engineering

ABSTRACTThe objective of the present in vitro research was to determine cardiomyocyte function on poly lactic-co-glycolic acid (50:50 (PLA:PGA); PLGA) with greater amounts of carbon nanofibers (CNFs) and variations in CNF size, for myocardial tissue engineering applications. The addition of CNFs would increase conductivity and strength of pure PLGA. For this reason, different PLGA: CNF ratios (100:0, 75:25, 50:50, 25:75, 0:100 wt.%) were created and conductivity and cytocompatibility properties with human cardiomyocytes were determined. Results showed that PLGA:CNF materials were conductive and that conductivity increased with greater amounts of PLGA added, from 0 S.m-1 for 100:0 wt.% (pure PLGA) to 5.5x10-3 S.m-1 for 0:100 wt.% (pure CNFs) material. Furthermore, results indicated that cardiomyocyte density increased with greater amounts of CNFs of 200nm in diameter in PLGA (up to 25:75 wt.% , PLGA:CNFs). This study, thus, provided an alternative conductive scaffold using nanotechnology which should be further explored for cardiovascular applications.

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Synthesis and Electrochemical Properties of Carbon Nanofibers and SiO2/Carbon Nanofiber Composite on Ni–Cu/C-Fiber Textiles

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2015.11555 ◽

2015 ◽

Vol 15 (11) ◽

pp. 8989-8995 ◽

Cited By ~ 2

Author(s):

Ki-Mok Nam ◽

Heai-Ku Park ◽

Chang-Seop Lee

Keyword(s):

Electrochemical Properties ◽

Carbon Nanofibers ◽

Carbon Nanofiber ◽

Nanofiber Composite ◽

C Fiber

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PdxFey alloy nanoparticles decorated on carbon nanofibers with improved electrocatalytic activity for ethanol electrooxidation in alkaline media

New Journal of Chemistry ◽

10.1039/c9nj06086c ◽

2020 ◽

Vol 44 (13) ◽

pp. 5023-5032 ◽

Cited By ~ 2

Author(s):

Dan Geng ◽

Sheng Zhu ◽

Mengzhu Chai ◽

Zhengyang Zhang ◽

Jinchen Fan ◽

...

Keyword(s):

Fuel Cells ◽

Carbon Nanofibers ◽

Electrocatalytic Activity ◽

Carbon Nanofiber ◽

Alkaline Media ◽

Alloy Nanoparticles ◽

Ethanol Electrooxidation ◽

Anode Catalyst ◽

Ethanol Fuel

We prepared bimetallic PdxFey alloy nanoparticles/carbon nanofiber composites with different Pd/Fe mole ratios and showed their advantage as a potential anode catalyst in ethanol fuel cells.

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Cytocompatibility of Carbon Nanofiber Materials for Neural Applications

MRS Proceedings ◽

10.1557/proc-774-o7.35 ◽

2003 ◽

Vol 774 ◽

Author(s):

Janice L. McKenzie ◽

Michael C. Waid ◽

Riyi Shi ◽

Thomas J. Webster

Keyword(s):

Carbon Fiber ◽

Surface Energy ◽

Carbon Nanofibers ◽

Carbon Fibers ◽

Carbon Nanofiber ◽

Fiber Composite ◽

Scar Tissue ◽

Pc 12 Cells ◽

Low Surface Energy ◽

Poly Carbonate

AbstractSince the cytocompatibility of carbon nanofibers with respect to neural applications remains largely uninvestigated, the objective of the present in vitro study was to determine cytocompatibility properties of formulations containing carbon nanofibers. Carbon fiber substrates were prepared from four different types of carbon fibers, two with nanoscale diameters (nanophase, or less than or equal to 100 nm) and two with conventional diameters (or greater than 200 nm). Within these two categories, both a high and a low surface energy fiber were investigated and tested. Astrocytes (glial scar tissue-forming cells) and pheochromocytoma cells (PC-12; neuronal-like cells) were seeded separately onto the substrates. Results provided the first evidence that astrocytes preferentially adhered on the carbon fiber that had the largest diameter and the lowest surface energy. PC-12 cells exhibited the most neurites on the carbon fiber with nanodimensions and low surface energy. These results may indicate that PC-12 cells prefer nanoscale carbon fibers while astrocytes prefer conventional scale fibers. A composite was formed from poly-carbonate urethane and the 60 nm carbon fiber. Composite substrates were thus formed using different weight percentages of this fiber in the polymer matrix. Increased astrocyte adherence and PC-12 neurite density corresponded to decreasing amounts of the carbon nanofibers in the poly-carbonate urethane matrices. Controlling carbon fiber diameter may be an approach for increasing implant contact with neurons and decreasing scar tissue formation.

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Cytocompatibility and Material Properties of Poly-carbonate Urethane/Carbon Nanofiber Composites for Neural Applications

MRS Proceedings ◽

10.1557/proc-774-o7.30 ◽

2003 ◽

Vol 774 ◽

Author(s):

Janice L. McKenzie ◽

Michael C. Waid ◽

Riyi Shi ◽

Thomas J. Webster

Keyword(s):

Mechanical Properties ◽

Carbon Nanofibers ◽

Material Properties ◽

Carbon Nanofiber ◽

Scar Tissue ◽

Tissue Response ◽

Positive Interactions ◽

Weight Percentage ◽

Poly Carbonate

AbstractCarbon nanofibers possess excellent conductivity properties, which may be beneficial in the design of more effective neural prostheses, however, limited evidence on their cytocompatibility properties exists. The objective of the present in vitro study was to determine cytocompatibility and material properties of formulations containing carbon nanofibers to predict the gliotic scar tissue response. Poly-carbonate urethane was combined with carbon nanofibers in varying weight percentages to provide a supportive matrix with beneficial bulk electrical and mechanical properties. The substrates were tested for mechanical properties and conductivity. Astrocytes (glial scar tissue-forming cells) were seeded onto the substrates for adhesion. Results provided the first evidence that astrocytes preferentially adhered to the composite material that contained the lowest weight percentage of carbon nanofibers. Positive interactions with neurons, and, at the same time, limited astrocyte functions leading to decreased gliotic scar tissue formation are essential for increased neuronal implant efficacy.

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