Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst
Само за регистроване кориснике
1998
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Iron(III) tetramethoxyphenyl porphyrin chloride adsorbed on the Black Pearls carbon (FeTMPP-Cl/BP) was heat-treated at temperatures from 200 to 1000°C in Ar atmosphere and characterized by using cyclic voltammetry, X-ray photoclectron spectroscopy (XPS), and transmission electron microscopy (TEM) techniques. Cyclic voltammetry experiments were carried out in acidic and alkaline solutions. Redox peaks due to the Fe(III)/Fe(II) reaction were present in an unheat-treated sample and in the sample heat-treated at 200°C but were significantly reduced in height for the sample heat-treated at 400°C. At higher temperatures they disappeared, indicating decomposition of FeTMPP-Cl. After heat-treatment at 700°C or higher, an anodic peak in the first cathodic A weep was observed and it was attributed to the dissolution of metallic Fe. XPS measurements did not show unambiguously the valence state of the Fe in the electrocatalyst heat-treated at high temperatures, but comparison of cyclic voltammogra...ms of dectrodeposited Fe and a bulk Fe electrode with cyclic voltammograms of FeTMPP-Cl/BP indicated that it was metallic Fe. Fe particles were observed on TEM images. Many more iron particles were present in the sample heat-treated at 1000°C than in the sample heat-treated at 800°C. Some of the particles remained in both samples after electrochemical dissolution, and they were completely surrounded by carbon particles or wrapped in the graphite shell. A well-defined graphite shell surrounding iron particles was observed only in the sample heat-treated at 1000°C.
Извор:
Journal of the Electrochemical Society, 1998, 145, 10, 3493-3499Издавач:
- Electrochemical Soc Inc, Pennington
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Gojković, Snežana Lj. AU - Gupta, S. AU - Savinell, R.F. PY - 1998 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/179 AB - Iron(III) tetramethoxyphenyl porphyrin chloride adsorbed on the Black Pearls carbon (FeTMPP-Cl/BP) was heat-treated at temperatures from 200 to 1000°C in Ar atmosphere and characterized by using cyclic voltammetry, X-ray photoclectron spectroscopy (XPS), and transmission electron microscopy (TEM) techniques. Cyclic voltammetry experiments were carried out in acidic and alkaline solutions. Redox peaks due to the Fe(III)/Fe(II) reaction were present in an unheat-treated sample and in the sample heat-treated at 200°C but were significantly reduced in height for the sample heat-treated at 400°C. At higher temperatures they disappeared, indicating decomposition of FeTMPP-Cl. After heat-treatment at 700°C or higher, an anodic peak in the first cathodic A weep was observed and it was attributed to the dissolution of metallic Fe. XPS measurements did not show unambiguously the valence state of the Fe in the electrocatalyst heat-treated at high temperatures, but comparison of cyclic voltammograms of dectrodeposited Fe and a bulk Fe electrode with cyclic voltammograms of FeTMPP-Cl/BP indicated that it was metallic Fe. Fe particles were observed on TEM images. Many more iron particles were present in the sample heat-treated at 1000°C than in the sample heat-treated at 800°C. Some of the particles remained in both samples after electrochemical dissolution, and they were completely surrounded by carbon particles or wrapped in the graphite shell. A well-defined graphite shell surrounding iron particles was observed only in the sample heat-treated at 1000°C. PB - Electrochemical Soc Inc, Pennington T2 - Journal of the Electrochemical Society T1 - Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst EP - 3499 IS - 10 SP - 3493 VL - 145 DO - 10.1149/1.1838833 ER -
@article{ author = "Gojković, Snežana Lj. and Gupta, S. and Savinell, R.F.", year = "1998", abstract = "Iron(III) tetramethoxyphenyl porphyrin chloride adsorbed on the Black Pearls carbon (FeTMPP-Cl/BP) was heat-treated at temperatures from 200 to 1000°C in Ar atmosphere and characterized by using cyclic voltammetry, X-ray photoclectron spectroscopy (XPS), and transmission electron microscopy (TEM) techniques. Cyclic voltammetry experiments were carried out in acidic and alkaline solutions. Redox peaks due to the Fe(III)/Fe(II) reaction were present in an unheat-treated sample and in the sample heat-treated at 200°C but were significantly reduced in height for the sample heat-treated at 400°C. At higher temperatures they disappeared, indicating decomposition of FeTMPP-Cl. After heat-treatment at 700°C or higher, an anodic peak in the first cathodic A weep was observed and it was attributed to the dissolution of metallic Fe. XPS measurements did not show unambiguously the valence state of the Fe in the electrocatalyst heat-treated at high temperatures, but comparison of cyclic voltammograms of dectrodeposited Fe and a bulk Fe electrode with cyclic voltammograms of FeTMPP-Cl/BP indicated that it was metallic Fe. Fe particles were observed on TEM images. Many more iron particles were present in the sample heat-treated at 1000°C than in the sample heat-treated at 800°C. Some of the particles remained in both samples after electrochemical dissolution, and they were completely surrounded by carbon particles or wrapped in the graphite shell. A well-defined graphite shell surrounding iron particles was observed only in the sample heat-treated at 1000°C.", publisher = "Electrochemical Soc Inc, Pennington", journal = "Journal of the Electrochemical Society", title = "Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst", pages = "3499-3493", number = "10", volume = "145", doi = "10.1149/1.1838833" }
Gojković, S. Lj., Gupta, S.,& Savinell, R.F.. (1998). Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst. in Journal of the Electrochemical Society Electrochemical Soc Inc, Pennington., 145(10), 3493-3499. https://doi.org/10.1149/1.1838833
Gojković SL, Gupta S, Savinell R. Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst. in Journal of the Electrochemical Society. 1998;145(10):3493-3499. doi:10.1149/1.1838833 .
Gojković, Snežana Lj., Gupta, S., Savinell, R.F., "Heat-treated iron(III) tetramethoxyphenyl porphyrin supported on high-area carbon as an electrocatalyst for oxygen: I. Characterization of the electrocatalyst" in Journal of the Electrochemical Society, 145, no. 10 (1998):3493-3499, https://doi.org/10.1149/1.1838833 . .