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
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 -