Influence of the reaction temperature on the oxygen reduction reaction on nitrogen-doped carbon nanotube catalysts

Truong‐Phuoc, Lai; Duong‐Viet, Cuong; Doh, Won Hui; Bonnefont, Antoine; Janowska, Izabela; Bégin, Dominique; Savinova, Elena R.; Granger, Pascal; Pham‐Huu, Cuong

doi:10.1016/j.cattod.2014.11.020

Cited by 21 publications

(6 citation statements)

References 68 publications

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“…The CVD technique offers the possibility for in situ N-doping of CNFs and CNTs by simply introducing a nitrogen precursor during the synthesis. A wide range of nitrogen sources have been employed including ammonia [15], pyridine [16], acetonitrile [17][18][19], melamine [20] and imidazole [21]. Ammonia might be the most convenient nitrogen precursor to employ because it is inexpensive, abundant, exists in gaseous form at room temperature and can easily be added to the precursor feed.…”

Section: Introductionmentioning

confidence: 99%

“…In their reports the catalysts were synthesized by decomposition of acetonitrile over silica, magnesia and Vulcan carbon supports impregnated with Fe-, Ni-or Co-acetate. In recent years several research groups have reported oxygen reduction activity for various forms of N-CNFs in both alkaline electrolyte [4,15,17] and acidic electrolyte [18,24]. However, complex growth precursors and synthesis procedures are often employed.…”

Section: Introductionmentioning

confidence: 99%

“…Especially the use of oxide supports with low electronic conductivity makes purification steps such as refluxing in concentrated alkaline and acidic solution necessary before employing the N-CNFs in electrocatalytic applications. Harsh post treatment procedures not only complicates the synthesis, but also alters the surface chemistry and the catalytic properties of the N-CNFs [15,19,25].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts

Buan

Muthuswamy

Walmsley

et al. 2016

Carbon

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A single-step chemical vapor deposition method using simple gaseous precursors was employed to grow nitrogen-doped carbon nanofibers from Fe and Ni particles on the surface of expanded graphite (N-CNF/EG). Due to the high electronic conductivity of the expanded graphite the N-CNF/EG could be used as electrocatalysts without the need for harsh purification procedures. Electrochemical testing showed that the N-CNFs grown from Fe exhibited a notable activity for the oxygen reduction in both acidic and alkaline electrolyte, in addition to demonstrating a high durability with a well-preserved catalytic activity after 1600 cycles in O2-saturated 0.5M H2SO4. Physicochemical characterization revealed the formation of N-CNFs with a bamboo-like structure, encapsulated Fe particles and high pyridinic nitrogen content. The combination of high ORR-activity, an easily scalable synthesis approach and a highly conductive support material makes N-CNF/EG a promising oxygen reduction catalyst for low temperature fuel cells.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts

Buan

Muthuswamy

Walmsley

et al. 2016

Carbon

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“…Tungsten carbide has been studied as a possible candidate alone or as support material [11][12][13]. Metal nitrides and oxides have also been studied as non-noble metal catalyst for ORR [14,15].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen doped sublimed carbon as non-noble metal catalyst for oxygen reduction reaction

et al. 2016

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“…Nitrogen‐doped carbon nanomaterials prepared in the presence of Fe have shown promising activity for the oxygen reduction reaction (ORR), the cathode reaction in fuel cells . However, in acidic electrolytes the ORR activities reported so far have not been as high as for traditional Pt/C catalysts.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen‐doped Carbon Nanofibers for the Oxygen Reduction Reaction: Importance of the Iron Growth Catalyst Phase

et al. 2017

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A systematic evaluation of the oxygen reduction reaction (ORR) on nitrogen‐doped carbon nanofibers (N‐CNFs) has been performed by tuning the properties of the N‐CNFs by using chemical vapor deposition. Analysis of the as‐synthesized N‐CNFs shows that the iron used as the growth catalyst consists of iron carbides, including Fe7C3, χ‐Fe5C2, and θ‐Fe3C, depending on the carbon activity of the synthesis feed. Furthermore, a relationship between the growth catalyst phase, the N‐CNF properties, and the electrocatalytic activity for the oxygen reduction in acidic electrolyte is revealed. The best catalytic activity and selectivity was achieved if the N‐CNFs were grown from Hägg carbide, χ‐Fe5C2, suggesting that this carbide phase favors the incorporation of active sites into the N‐CNFs. Controlling the phase of the iron particles used as growth catalysts is therefore essential for obtaining N‐CNFs with a high active site density for the oxygen reduction reaction.

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Influence of the reaction temperature on the oxygen reduction reaction on nitrogen-doped carbon nanotube catalysts

Cited by 21 publications

References 68 publications

Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts

Nitrogen-doped carbon nanofibers on expanded graphite as oxygen reduction electrocatalysts

Nitrogen doped sublimed carbon as non-noble metal catalyst for oxygen reduction reaction

Nitrogen‐doped Carbon Nanofibers for the Oxygen Reduction Reaction: Importance of the Iron Growth Catalyst Phase

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