TY - JOUR
T1 - Catalytic electroreduction of molecular oxygen at glassy carbon electrodes with immobilized iron porphyrins containing zero, one, or four amino groups
AU - Kobayashi, Nagao
AU - Nishiyama, Yoshiyuki
N1 - Funding Information:
We thank Professors T. Osa and S. Toshima for use of the electrochemical instruments, and are indebted to Dr. M. Arai for his courtesy work. This work was partially supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, No. 59750698.
PY - 1984/12/24
Y1 - 1984/12/24
N2 - Reduction of oxygen at glassy carbon (GC) electrodes modified with iron tetraphenyloprphyrin derivatives (FeTPPs) having zero, one, or four amino groups was studied by several electrochemical methods. The number of prophyrin layers required to attain four-electron reduction in water were ca. 8, 5, and 2 for FeTTPs containing zero, one and four amino groups, respectively, indicating that the functional group does influence O2 reduction. Moreover, the rate constants governing the reaction of the catalysts with oxygen were larger for FeTTPs with more amino groups. Ellipsometry on the modified GCs suggested that the porphyrin molecules are nearly stratified on the GC surface and therefore that the interdistance of the porphyrin plane is not a signficant factor affecting the four-electron reduction of oxygen.
AB - Reduction of oxygen at glassy carbon (GC) electrodes modified with iron tetraphenyloprphyrin derivatives (FeTPPs) having zero, one, or four amino groups was studied by several electrochemical methods. The number of prophyrin layers required to attain four-electron reduction in water were ca. 8, 5, and 2 for FeTTPs containing zero, one and four amino groups, respectively, indicating that the functional group does influence O2 reduction. Moreover, the rate constants governing the reaction of the catalysts with oxygen were larger for FeTTPs with more amino groups. Ellipsometry on the modified GCs suggested that the porphyrin molecules are nearly stratified on the GC surface and therefore that the interdistance of the porphyrin plane is not a signficant factor affecting the four-electron reduction of oxygen.
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U2 - 10.1016/0368-1874(84)83623-0
DO - 10.1016/0368-1874(84)83623-0
M3 - Article
AN - SCOPUS:0021607656
VL - 181
SP - 107
EP - 117
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
SN - 1572-6657
IS - 1-2
ER -