Cobalt tetramethoxyphenyl porphyrin—emission Mossbauer spectroscopy and O2 reduction electrochemical studies

Scherson, Daniel Alberto; Gupta, Shiva; Fierro, C.; Yeager, Ernest; Kordesch, M. E.; Eldridge, J. M.; Hoffman, R. W.; Blue, J. W.

doi:10.1016/0013-4686(83)85006-3

Cited by 139 publications

(75 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• corresponds to the carbon support. Therefore, heat-treatment at temperatures higher than 700 • C could lead to the undesirable decomposition of metal-TPTZ complexes to their metallic state, which might spontaneously oxidize to metallic oxides when exposed to air at room temperature [21]. The decompositions of Fe/Co-TPTZ complexes during heat-treatment are believed to be complicated processes producing many species, including metal-nitrogen species, metals in their metallic state, and metal carbides.…”

Section: Physical Characterization Of the Fe 1 Co 1 -N/c Catalystsmentioning

confidence: 99%

Synthesis of carbon-supported binary FeCo–N non-noble metal electrocatalysts for the oxygen reduction reaction

Kim

Pan

et al. 2010

Electrochimica Acta

View full text Add to dashboard Cite

This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited.In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit:

show abstract

Section: Physical Characterization Of the Fe 1 Co 1 -N/c Catalystsmentioning

confidence: 99%

Synthesis of carbon-supported binary FeCo–N non-noble metal electrocatalysts for the oxygen reduction reaction

Kim

Pan

et al. 2010

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…10 (b) M-N x sites, first proposed by Yeager and co-workers, 7,8 and further developed by the Dodelet group, and others; 1 and (c) metal-free carbon structure, as originally proposed by Wiesener 11 (with metal serving merely as a catalyst for the ORR active-site formation).…”

Section: ' Introductionmentioning

confidence: 99%

Theoretical Study of Possible Active Site Structures in Cobalt- Polypyrrole Catalysts for Oxygen Reduction Reaction

Shi¹,

Liu²,

Lee³

et al. 2011

J. Phys. Chem. C

View full text Add to dashboard Cite

“…together with the catalyst loading, whether the catalyst is present as a (sub)monolayer coverage or in the form of aggregates. This is also influenced by the preparation method and the properties of the chelate itself: mechanical mixing, for instance [9], will give aggregates; precipitation from a solution gives a more uniform coverage. A number of different carbons and some of their properties are presented in Table 2.…”

Section: Introductionmentioning

confidence: 99%

“…A number of different carbons and some of their properties are presented in Table 2. Yeager and co-workers [9] Finally, the results are influenced by the electrolyte in which the 0, reduction is studied. Most authors use H,SO, at room temperature; however, H,PO, [2,10], NaCl [16], NaOH [9] and KOH [15] are also used.…”

Section: Introductionmentioning

confidence: 99%

Oxygen reduction on pyrolysed carbon-supported transition metal chelates

Putten

Elzing

Visscher

et al. 1986

Journal of Electroanalytical Chemistry and Interfacial Electroc

View full text Add to dashboard Cite

A review is given of the pyrolysis behaviour of carbon-supported transition metal chelates and the developed theories explaining the increased activity and stability towards oxygen reduction. Additional measurements with a new carbon-modified rotating ring-disc electrode show that the central metal ion-N, unit remains the active site after pyrolysis. The selectivity is increased after pyrolysis since relatively less H,O, is detected at the ring. The number of available active sites is an important parameter for the resulting activity. During the heat treatment, different processes take place: migration of the chelates over the carbon support, increasing the number of available active sites; reaction of the outer fringes of the organic skeleton retaining the metal ion-N, unit; and degradation of the catalyst with loss of activity. The condition of the pyrolysed catalyst and its corresponding activity are determined by the relative rate of these processes at the given pyrolysis temperature.

show abstract

Cobalt tetramethoxyphenyl porphyrin—emission Mossbauer spectroscopy and O2 reduction electrochemical studies

Cited by 139 publications

References 9 publications

Synthesis of carbon-supported binary FeCo–N non-noble metal electrocatalysts for the oxygen reduction reaction

Synthesis of carbon-supported binary FeCo–N non-noble metal electrocatalysts for the oxygen reduction reaction

Theoretical Study of Possible Active Site Structures in Cobalt- Polypyrrole Catalysts for Oxygen Reduction Reaction

Oxygen reduction on pyrolysed carbon-supported transition metal chelates

Contact Info

Product

Resources

About