The Role of Electrolytically Co-Deposited Platinum-Palladium Electrodes On The Electrooxidation of D. Glucose In Alkaline medium: A Synergistic Effect

İpek BECERİK

Makale detayları

The Role of Electrolytically Co-Deposited Platinum-Palladium Electrodes On The Electrooxidation of D. Glucose In Alkaline medium: A Synergistic Effect

Yazarlar:

İpek BECERİK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 1999 Vol.23 Issue 1, pp.57-66

Belge Tipi:

Makale

Yayın Tarihi:

12/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000730500

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

The electrooxidation of D. glucose was investigated on  platinum-palladium alloy electrodes of different compositions in  alkaline aqueous solutions.  The surface characteristics of the alloys  in contact with electrolytic solution were studied using cyclic  voltammetry.  In particular, a surface enrichment in platinum due to a  preferential dissolution of palladium was shown.  Enhanced  electrocatalytic activity at about 37 at. % in Pd was obtained when  compared to pure metals, thus leading to a synergistic effect.  The  electrocatalytic activity of different alloys for D. glucose oxidation  has been chacterized by exchange current densities obtained from  extrapolation of Tafel lines to calculated equilibrium potential.  An  explanation of these effects was suggested on the basis of a decrease  of strongly bound residue of D. glucose.  The present work supports  the proposed mechanism of the appearance of a high catalytic activity  of Pt-Pd alloy for D. glucose oxidation.

 

The electrooxidation of D. glucose was investigated on  platinum-palladium alloy electrodes of different compositions in  alkaline aqueous solutions.  The surface characteristics of the alloys  in contact with electrolytic solution were studied using cyclic  voltammetry.  In particular, a surface enrichment in platinum due to a  preferential dissolution of palladium was shown.  Enhanced  electrocatalytic activity at about 37 at. % in Pd was obtained when  compared to pure metals, thus leading to a synergistic effect.  The  electrocatalytic activity of different alloys for D. glucose oxidation  has been chacterized by exchange current densities obtained from  extrapolation of Tafel lines to calculated equilibrium potential.  An  explanation of these effects was suggested on the basis of a decrease  of strongly bound residue of D. glucose.  The present work supports  the proposed mechanism of the appearance of a high catalytic activity  of Pt-Pd alloy for D. glucose oxidation.

Makale detayları

The Role of Electrolytically Co-Deposited Platinum-Palladium Electrodes On The Electrooxidation of D. Glucose In Alkaline medium: A Synergistic Effect

Yazarlar: İpek BECERİK

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 1999 Vol.23 Issue 1, pp.57-66

Belge Tipi: Makale

Yayın Tarihi: 12/1998

Belge Dili: Türkçe

Document ID (Org No.): 2000730500

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

İpek BECERİK

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 1999 Vol.23 Issue 1, pp.57-66

Belge Tipi:

Makale

Yayın Tarihi:

12/1998

Belge Dili:

Türkçe

Document ID (Org No.):

2000730500

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527