TY - JOUR
T1 - Electrochemical reduction of oxygen by metalloporphyrin ion-complexes with heat treatment
AU - Sawaguchi, Takahiro
AU - Itabashi, Takeyuki
AU - Matsue, Tomokazu
AU - Uchida, Isamu
N1 - Funding Information:
The present research was partly supported by a Grant-in-Aid for Scientific Research (60430021) from the Ministry of Education, Science and Culture. We thank Dr. J.R. Selman (Illinois Institute of Technology, U.S.A.) for useful discussions and Dr. M. Watanabe (Yamanashi University, Japan) for supplying the platinum catalyst.
PY - 1990/2/9
Y1 - 1990/2/9
N2 - The catalytic activity and stability of carbon powders supporting metalloporphyrin ion-complexes for electrochemical reduction of oxygen have been studied in acidic solutions. The carbon catalysts were prepared by adsorption of an electrostatic aggregation of two metalloporphyrins, metal tetrakis(N-methyl-4-pyridyl) porphyrin (TMPyP, cationic) and metal tetrakis(sulphophenyl)porphyrin (TPPS, anionic), to carbon powders dispersed in a solution. Treatment of the carbon catalysts in an argon atmosphere at 800°C enhances the activity and stability. The catalyst prepared using the FeTMPyP-FeTPPS aggregate shows a high activity comparable to that of platinum particles and reduces molecular oxygen through a four-electron process. The electrostatic aggregation of iron porphyrins forms active sites on the carbon surface and these sites persist even after heat treatment, causing a high activity for oxygen reduction.
AB - The catalytic activity and stability of carbon powders supporting metalloporphyrin ion-complexes for electrochemical reduction of oxygen have been studied in acidic solutions. The carbon catalysts were prepared by adsorption of an electrostatic aggregation of two metalloporphyrins, metal tetrakis(N-methyl-4-pyridyl) porphyrin (TMPyP, cationic) and metal tetrakis(sulphophenyl)porphyrin (TPPS, anionic), to carbon powders dispersed in a solution. Treatment of the carbon catalysts in an argon atmosphere at 800°C enhances the activity and stability. The catalyst prepared using the FeTMPyP-FeTPPS aggregate shows a high activity comparable to that of platinum particles and reduces molecular oxygen through a four-electron process. The electrostatic aggregation of iron porphyrins forms active sites on the carbon surface and these sites persist even after heat treatment, causing a high activity for oxygen reduction.
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U2 - 10.1016/0022-0728(90)85178-8
DO - 10.1016/0022-0728(90)85178-8
M3 - Article
AN - SCOPUS:0000978037
VL - 279
SP - 219
EP - 230
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 1572-6657
IS - 1-2
ER -