Effect of purification of carbon nanotubes on their electrocatalytic properties for oxygen reduction in acid solution

Kruusenberg, Ivar; Alexeyeva, Nadezda; Tammeveski, Kaido; Kozlova, Jekaterina; Matisen, Leonard; Sammelselg, Väinö; Solla-Gullón, José; Feliu, Juan M.

doi:10.1016/j.carbon.2011.05.048

Cited by 77 publications

(52 citation statements)

References 53 publications

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“…The value of E 1/2 for ORR on commercial Pt/C modified GC electrode was 0.85 V which is in good agreement with previous studies [58]. The E 1/2 value for unmodified MWCNTs is significantly lower in acid media, consistent with our early work [65,66].…”

Section: Oxygen Reduction On Pt-tio 2 /Mwcnt Catalystssupporting

confidence: 92%

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Jukk

Kongi

Tarre

et al. 2014

Journal of Electroanalytical Chemistry

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Section: Oxygen Reduction On Pt-tio 2 /Mwcnt Catalystssupporting

confidence: 92%

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Jukk

Kongi

Tarre

et al. 2014

Journal of Electroanalytical Chemistry

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“…The samples represent mainly MWCNT material with some inclusions which originate from CM and DCDA pyrolysis. 66 For both nitrogen-doped carbon nanotube samples the C1s peak appears at 284.8 eV, O1s at 532.1 eV and N1s at 398.2 eV (Figure 4a for NCNT-CM and 4b for NCNT-DCDA). These inclusions are most probably graphitic carbon nitride, which usually forms during CM or DCDA pyrolysis.…”

Section: Surface Characterisation Of N-doped Cnt Materialsmentioning

confidence: 96%

Enhanced electrocatalytic activity of nitrogen-doped multi-walled carbon nanotubes towards the oxygen reduction reaction in alkaline media

et al. 2015

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In this work multi-walled carbon-nanotubes (MWCNTs) were doped with nitrogen using cyanamide (CM) or dicyandiamide (DCDA). To incorporate nitrogen into the CNT structure, high-temperature pyrolysis in an inert atmosphere was performed. For surface characterisation of nitrogen-doped CNTs (NCNTs) X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were used. According to the results of XPS analysis, nitrogen was successfully incorporated into the carbon nanotube network. The electrocatalytic activity of NCNT catalysts for oxygen reduction reaction (ORR) in alkaline media was examined using the rotating disk electrode (RDE) and linear sweep voltammetry (LSV) measurements. The NCNT-DCDA material showed a better ORR performance than the NCNT-CM catalyst. The RDE results reveal that the NCNT materials studied could be considered as interesting alternatives to Pt-based catalysts in alkaline membrane fuel cells.

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“…The purification methods can be classified as chemical oxidation methods (e.g., gas‐phase oxidation, liquid‐phase oxidation, electrochemical oxidation), physical‐based methods (e.g., filtration, centrifugation, annealing), or multistep methods (e.g., sonication in combination with oxidation). The details of purification techniques, evaluation methods, and possible effects of the purity on CNT properties have been well studied and are reviewed elsewhere …”

Section: Structures Properties and Macroscopic Assemblies Of Cntsmentioning

confidence: 99%

Macroscopic Carbon Nanotube‐based 3D Monoliths

Zhao

Zhang

et al. 2015

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Carbon nanotubes (CNTs) are one of the most promising carbon allotropes with incredible diverse physicochemical properties, thereby enjoying continuous worldwide attention since their discovery about two decades ago. From the point of view of practical applications, assembling individual CNTs into macroscopic functional and high-performance materials is of paramount importance. For example, multiscaled CNT-based assemblies including 1D fibers, 2D films, and 3D monoliths have been developed. Among all of these, monolithic 3D CNT architectures with porous structures have attracted increasing interest in the last few years. In this form, theoretically all individual CNTs are well connected and fully expose their surfaces. These 3D architectures have huge specific surface areas, hierarchical pores, and interconnected conductive networks, resulting in enhanced mass/electron transport and countless accessible active sites for diverse applications (e.g. catalysis, capacitors, and sorption). More importantly, the monolithic form of 3D CNT assemblies can impart additional application potentials to materials, such as free-standing electrodes, sensors, and recyclable sorbents. However, scaling the properties of individual CNTs to 3D assemblies, improving use of the diverse, structure-dependent properties of CNTs, and increasing the performance-to-cost ratio are great unsolved challenges for their real commercialization. This review aims to provide a comprehensive introduction of this young and energetic field, i.e., CNT-based 3D monoliths, with a focus on the preparation principles, current synthetic methods, and typical applications. Opportunities and challenges in this field are also presented.

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Effect of purification of carbon nanotubes on their electrocatalytic properties for oxygen reduction in acid solution

Cited by 77 publications

References 53 publications

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Electrochemical oxygen reduction behaviour of platinum nanoparticles supported on multi-walled carbon nanotube/titanium dioxide composites

Enhanced electrocatalytic activity of nitrogen-doped multi-walled carbon nanotubes towards the oxygen reduction reaction in alkaline media

Macroscopic Carbon Nanotube‐based 3D Monoliths

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