Performance evaluation of platinum-based catalysts for the development of proton exchange membrane fuel cells

Performance evaluation of platinum-based Development

Makale detayları

Performance evaluation of platinum-based catalysts for the development of proton exchange membrane fuel cells

Yazarlar:

Performance evaluation of platinum-based Development

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2010 Vol.34 Issue 2, pp.193-206

Belge Tipi:

Makale

Yayın Tarihi:

1/2010

Belge Dili:

Türkçe

Document ID (Org No.):

2000728091

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527

Özet:

 

Platinum-based catalysts are considered the most efficient  catalysts for triggering electrochemical reactions in proton exchange  membrane (PEM) fuel cells.  In the present study, commercial catalysts  containing 10% and 30% Pt supported on Vulcan XC-72 carbon were  studied to assess their performance in PEM fuel cells.  Both catalysts  consisted of Pt particles of almost the same size.  The utility of  these catalysts in PEM fuel cells was studied by finding the real  surface area and rate of electro-oxidation of methanol in 0.5 M  H2SO4 by using cyclic voltammetry.  The methanol oxidation reaction  was used for characterization of catalysts of PEM fuel cells due to  the liquid nature of methanol and the close resemblance of basic  electrochemical features of direct methanol fuel cells and PEM fuel  cells.  Comparison of the data of real surface area and rate of  electro-oxidation of methanol showed that 30% Pt catalyst having  higher Pt loading is more suitable for PEM fuel cells as compared with  10% Pt catalyst.  The PEM fuel cell components were designed and  fabricated for testing of membrane electrode assemblies (MEAs).  The  importance of an additional gas diffusion layer in the form of carbon  paper was also emphasized for improving gas diffusion and electrical  contact of electrodes of MEAs with the flow field area of  monopolar/bipolar plates of PEM fuel cells.  The MEAs prepared from  10% and 30% Pt catalysts with Pt loading of 0.5 mg cm-2 gave  the maximum power density of 119 and 185 mW cm-2, respectively.  It  was concluded that nanosize carbon supported Pt catalysts having  higher Pt loading are more suitable catalysts for preparing high  performance MEAs of PEM fuel cells and the cyclic voltammetric data of  real surface area and rate of methanol oxidation may be utilized to  assess the performance of a given catalyst prior to its use in the  preparation of MEAs of PEM fuel cells.

 

Platinum-based catalysts are considered the most efficient  catalysts for triggering electrochemical reactions in proton exchange  membrane (PEM) fuel cells.  In the present study, commercial catalysts  containing 10% and 30% Pt supported on Vulcan XC-72 carbon were  studied to assess their performance in PEM fuel cells.  Both catalysts  consisted of Pt particles of almost the same size.  The utility of  these catalysts in PEM fuel cells was studied by finding the real  surface area and rate of electro-oxidation of methanol in 0.5 M  H2SO4 by using cyclic voltammetry.  The methanol oxidation reaction  was used for characterization of catalysts of PEM fuel cells due to  the liquid nature of methanol and the close resemblance of basic  electrochemical features of direct methanol fuel cells and PEM fuel  cells.  Comparison of the data of real surface area and rate of  electro-oxidation of methanol showed that 30% Pt catalyst having  higher Pt loading is more suitable for PEM fuel cells as compared with  10% Pt catalyst.  The PEM fuel cell components were designed and  fabricated for testing of membrane electrode assemblies (MEAs).  The  importance of an additional gas diffusion layer in the form of carbon  paper was also emphasized for improving gas diffusion and electrical  contact of electrodes of MEAs with the flow field area of  monopolar/bipolar plates of PEM fuel cells.  The MEAs prepared from  10% and 30% Pt catalysts with Pt loading of 0.5 mg cm-2 gave  the maximum power density of 119 and 185 mW cm-2, respectively.  It  was concluded that nanosize carbon supported Pt catalysts having  higher Pt loading are more suitable catalysts for preparing high  performance MEAs of PEM fuel cells and the cyclic voltammetric data of  real surface area and rate of methanol oxidation may be utilized to  assess the performance of a given catalyst prior to its use in the  preparation of MEAs of PEM fuel cells.

Makale detayları

Performance evaluation of platinum-based catalysts for the development of proton exchange membrane fuel cells

Yazarlar: Performance evaluation of platinum-based Development

Yayıncı: TUBITAK

Dergi: Turkish Journal of Chemistry 2010 Vol.34 Issue 2, pp.193-206

Belge Tipi: Makale

Yayın Tarihi: 1/2010

Belge Dili: Türkçe

Document ID (Org No.): 2000728091

Sıklık: İki Aylık

eISSN: 1303-6130

pISSN: 1300-0527

Sayı

Yazarlar:

Performance evaluation of platinum-based Development

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Chemistry 2010 Vol.34 Issue 2, pp.193-206

Belge Tipi:

Makale

Yayın Tarihi:

1/2010

Belge Dili:

Türkçe

Document ID (Org No.):

2000728091

Sıklık:

İki Aylık

eISSN:

1303-6130

pISSN:

1300-0527