Effect of pyrolysis temperature on cobalt phthalocyanine supported on carbon nanotubes for oxygen reduction reaction

Ramavathu, Lakshmana Naik; Maniam, Kranthi Kumar; Gopalram, Keerthiga; Chetty, Raghuram

doi:10.1007/s10800-012-0481-6

Cited by 42 publications

(17 citation statements)

References 34 publications

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“…Metallized macrocyclic compounds such as phthalocyanines, porphyrins, and corroles, have been used conveniently, as they contain both the transition metal and N in the same molecule [81,82,86,87].…”

Section: Methods 1: Catalysts Derived From Carbon Support and Nitrogenmentioning

confidence: 99%

“…The maximum pyrolysis temperature that have been used in the catalysts synthesis are between 1000 and 1100 • C, probably dictated by the technical limitation of the laboratory furnaces used to carry out the process. Several studies have focused on the pyrolysis temperature optimization, obtaining different values depending on the precursors used [26,[72][73][74]87]. No clear indication comes out analyzing the literature about an optimal pyrolysis temperature, however, the optimum is usually found between 800 and 1000 • C, especially in terms of stability [88].…”

Section: Methods 1: Catalysts Derived From Carbon Support and Nitrogenmentioning

confidence: 99%

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Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Osmieri

2019

ChemEngineering

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Platinum group metal (PGM)-free catalysts for oxygen reduction reaction (ORR) have attracted increasing interest as potential candidates to replace Pt, in the view of a future widespread commercialization of polymer electrolyte fuel cell (PEFC) devices, especially for automotive applications. Among different types of PGM-free catalysts, M–N–C materials appear to be the most promising ones in terms of activity. These catalysts can be produced using a wide variety of precursors containing C, N, and one (or more) active transition metal (mostly Fe or Co). The catalysts synthesis methods can be very different, even though they usually involve at least one pyrolysis step. In this review, five different synthesis methods are proposed, and described in detail. Several catalysts, produced approximately in the last decade, were analyzed in terms of performance in rotating disc electrode (RDE), and in H2/O2 or H2/air PEFC. The catalysts are subdivided in five different categories corresponding to the five synthesis methods described, and the RDE and PEFC performance is put in relation with the synthesis method.

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Section: Methods 1: Catalysts Derived From Carbon Support and Nitrogenmentioning

confidence: 99%

Section: Methods 1: Catalysts Derived From Carbon Support and Nitrogenmentioning

confidence: 99%

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Osmieri

2019

ChemEngineering

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“…Fe–N–C or Co–N–C doped CNT catalysts have received considerable attention because they exhibit a high ORR activity in acidic media. Composites modified by Fe or Co metal macrocycles or chelates as precursors to multiwalled CNTs (MWCNTs) were prepared by polymerization and impregnation, and their pyrolysis produced catalytically active Fe–N–C or Co–N–C sites attached to the surface of individual MWCNTs . As another modification method, nanographene moieties covering the CNT outer wall were formed by the harsh chemical oxidation of MWCNTs.…”

Section: Introductionmentioning

confidence: 99%

Iron–Nitrogen‐Doped Vertically Aligned Carbon Nanotube Electrocatalyst for the Oxygen Reduction Reaction

Yasuda

Furuya

Uchibori

et al. 2015

Adv Funct Materials

224

157

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A highly active iron-nitrogen-doped carbon nanotube catalyst for the oxygen reduction reaction (ORR) is produced by employing vertically aligned carbon nanotubes (VA-CNT) with a high specifi c surface area and iron(II) phthalocyanine (FePc) molecules. Pyrolyzing the composite easily transforms the adsorbed FePc molecules into a large number of iron coordinated nitrogen functionalized nanographene (Fe-N-C) structures, which serve as ORR active sites on the individual VA-CNT surfaces. The catalyst exhibits a high ORR activity, with onset and halfwave potentials of 0.97 and 0.79 V, respectively, versus reversible hydrogen electrode, a high selectivity of above 3.92 electron transfer number, and a high electrochemical durability, with a 17 mV negative shift of E 1/2 after 10 000 cycles in an oxygen-saturated 0.5 M H 2 SO 4 solution. The catalyst demonstrates one of the highest ORR performances in previously reported any-nanotube-based catalysts in acid media. The excellent ORR performance can be attributed to the formation of a greater number of catalytically active Fe-N-C centers and their dense immobilization on individual tubes, in addition to more effi cient mass transport due to the mesoporous nature of the VA-CNTs.

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“…In stage I, minimal weight loss (between 5-10%) was observed as a result of evaporation of residual moisture and possibly the loss of groups attached to peripheral ligands. 43 Stage II identified with major weight loss and the "major decomposition temperatures" were noted in Table S8. During stage II, the CoPcs and NiPcs lost between 60-75% of their weight, whereas the TiPcs and MnPcs showed greater weight loss between 80-98%.…”

Section: Thermogravimetric Analysis (Tga)mentioning

confidence: 99%

Metallophthalocyanines in a ternary photoactive layer (P3HT:MPc:PC₇₀BM) for bulk heterojunction solar cells

et al. 2020

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Effect of pyrolysis temperature on cobalt phthalocyanine supported on carbon nanotubes for oxygen reduction reaction

Cited by 42 publications

References 34 publications

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Iron–Nitrogen‐Doped Vertically Aligned Carbon Nanotube Electrocatalyst for the Oxygen Reduction Reaction

Metallophthalocyanines in a ternary photoactive layer (P3HT:MPc:PC₇₀BM) for bulk heterojunction solar cells

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Effect of pyrolysis temperature on cobalt phthalocyanine supported on carbon nanotubes for oxygen reduction reaction

Cited by 42 publications

References 34 publications

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Transition Metal–Nitrogen–Carbon (M–N–C) Catalysts for Oxygen Reduction Reaction. Insights on Synthesis and Performance in Polymer Electrolyte Fuel Cells

Iron–Nitrogen‐Doped Vertically Aligned Carbon Nanotube Electrocatalyst for the Oxygen Reduction Reaction

Metallophthalocyanines in a ternary photoactive layer (P3HT:MPc:PC70BM) for bulk heterojunction solar cells

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Product

Resources

About

Metallophthalocyanines in a ternary photoactive layer (P3HT:MPc:PC₇₀BM) for bulk heterojunction solar cells