On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts

Uner, Deniz; ELLİALTIOĞLU, Şinasi; SHALTAF, Riad; Kaya, Sarp; ERÜNAL, EBRU

On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts

Sarp KAYA, (Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Ankara, Türkiye)

EBRU ERÜNAL, (Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Ankara, Türkiye)

Riad SHALTAF, (Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, Ankara, Türkiye)

Şinasi ELLİALTIOĞLU, (Orta Doğu Teknik Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, Ankara, Türkiye)

DENİZ ÜNER (Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Kimya Mühendisliği Bölümü, Ankara, Türkiye)

Turkish Journal of Chemistry

6 0

Yıl: 2009 Cilt: 33 Sayı: 1 Sayfa Aralığı: 11 - 21 Metin Dili: İngilizce İndeks Tarihi: 29-07-2022

On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts

Öz:

CO oxidation reaction was studied over monometallic and bimetallic palladium–platinum catalysts at 25:75, 50:50, and 75:25 Pd:Pt atomic fractions co-impregnated over a $gamma$ -Al2O3 support. The size of the metal particles, measured by modified hydrogen chemisorption, increased as the Pd fractions in the catalyst increased. The surface compositions and site metal distributions of the catalysts determined from Monte Carlo simulations indicated that Pd atoms segregated to the surface: at low Pd levels, Pd occupied preferentially 6 and 7 coordinated defect-like sites. As the Pd fraction increased, first 8 coordinated (100) and then 9 coordinated (111) planes were populated. At low temperatures (below 423 K), CO oxidation reaction over bi-metallic catalysts behaved like the monometallic Pd catalyst suggesting that Pd atoms segregated to the surface. The results of Monte Carlo studies and reaction tests together were interpreted as the governing steps in CO oxidation primarily taking place at the defect-like sites.

Anahtar Kelime:

Konular: Mühendislik, Kimya

Belge Türü: Makale Makale Türü: Araştırma Makalesi Erişim Türü: Erişime Açık

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APA	Kaya S, ERÜNAL E, SHALTAF R, ELLİALTIOĞLU Ş, Uner D (2009). On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. , 11 - 21.
Chicago	Kaya Sarp,ERÜNAL EBRU,SHALTAF Riad,ELLİALTIOĞLU Şinasi,Uner Deniz On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. (2009): 11 - 21.
MLA	Kaya Sarp,ERÜNAL EBRU,SHALTAF Riad,ELLİALTIOĞLU Şinasi,Uner Deniz On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. , 2009, ss.11 - 21.
AMA	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. . 2009; 11 - 21.
Vancouver	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. . 2009; 11 - 21.
IEEE	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D "On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts." , ss.11 - 21, 2009.
ISNAD	Kaya, Sarp vd. "On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts". (2009), 11-21.

APA	Kaya S, ERÜNAL E, SHALTAF R, ELLİALTIOĞLU Ş, Uner D (2009). On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. Turkish Journal of Chemistry, 33(1), 11 - 21.
Chicago	Kaya Sarp,ERÜNAL EBRU,SHALTAF Riad,ELLİALTIOĞLU Şinasi,Uner Deniz On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. Turkish Journal of Chemistry 33, no.1 (2009): 11 - 21.
MLA	Kaya Sarp,ERÜNAL EBRU,SHALTAF Riad,ELLİALTIOĞLU Şinasi,Uner Deniz On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. Turkish Journal of Chemistry, vol.33, no.1, 2009, ss.11 - 21.
AMA	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. Turkish Journal of Chemistry. 2009; 33(1): 11 - 21.
Vancouver	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts. Turkish Journal of Chemistry. 2009; 33(1): 11 - 21.
IEEE	Kaya S,ERÜNAL E,SHALTAF R,ELLİALTIOĞLU Ş,Uner D "On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts." Turkish Journal of Chemistry, 33, ss.11 - 21, 2009.
ISNAD	Kaya, Sarp vd. "On the structure sensitivity of CO oxidation on alumina supported Pd-Pt bimetallic catalysts". Turkish Journal of Chemistry 33/1 (2009), 11-21.