Non-platinum oxygen reduction electrocatalysts based on pyrolyzed transition metal macrocycles (Record no. 43830)
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| fixed length control field | 02459nam a2200265Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625140615.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-9583 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Non-platinum oxygen reduction electrocatalysts based on pyrolyzed transition metal macrocycles |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Electrochimica Acta, In Press, 2008 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | In this work pyrolyzed porphyrins were investigated for oxygen reduction electrocatalysis. Pyrolysis of non-supported cobalt and iron tetraphenylporphyrins in the temperature range of 500.800 .C generates high surface area catalysts with high degree of exposure of active sites to the reacting species. This is achieved through templating porphyrins on fumed amorphous silica that is removed after pyrolysis by etching with concentrated KOH. Detailed material characterization of the pyrolyzed materials is presented here. X-ray photoelectron spectroscopy (XPS)analysis of cobalt and iron porphyrins was used to elucidate the transformations of nitrogen, carbon, cobalt and iron species resulting from the heat treatment. Partial decomposition of the precursor material and formation of polymer-like network decorated by metal oxide particles are identified. Differences in the chemical composition of products of pyrolysis of FeTPP, CoTPP and Co/FeTPP are discussed. Transmission electron microscopy (TEM)imaging revealed the structure of the pyrolyzed porphyrins andwas used to gain insight into the size of the metal crystals formed in the bulk. X-ray diffraction spectra (XRD)provided information about the type of crystals formed in the different formulations of the precursor porphyrins. Further, steady state polarization curves were obtained utilizing gas diffusion type electrodes in 0.5M sulfuric acid and membrane electrode assembly (MEA)configurations under working PEM fuel cell conditions. This work revealed the necessity of the metal phases for the oxygen reduction process. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | PYROLYZED PORPHYRINS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | OXYGEN REDUCTION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | POLYMER ELECTROLYTE FUEL CELLS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | NON-PLATINUM |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | NON-SUPPORTED |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Pylypenko, S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mukherjee, S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Olson, T.S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Atanassov, P. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/open?id=1Wgbxoa-5Br2dXGdXSy7IsOaKKoZW_ZNa&usp=drive_copy">https://drive.google.com/open?id=1Wgbxoa-5Br2dXGdXSy7IsOaKKoZW_ZNa&usp=drive_copy</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-9583 | 25.06.2025 | 25.06.2025 | Documentos solicitados |