Yüksek Sıcaklıkta Uygulamalar için Kükürde Dayanıklı Perovskit Elektrokatalizörler

Öz

Temiz ve karbon negatif enerji sistemlerinde katalitik operasyonların yaygınlaşmasıyla birlikte katalizör ve elektrokatalizörlerin geliştirilmesi de önem kazanmış olup, kimyasal ve ısıl açıdan dayanıklı karışık oksitlere (perovskitler) karşı ilgi artışı sürmektedir.  Bu çalışmada, temiz ve karbon negatif yaklaşımla hidrojen ve elektrik üretiminde kullanılmak üzere geliştirilmiş olan Co, Cr, La, Mo, Sr ve V içeren, genellikle ABO₃ ve A_xA’_(1-x)B_yB’_(1-y)O₃ yapısındaki bazı katalizör/elektrokatalizör perovskit maddeler elektriksel iletkenlik açısından 1100 K’e kadar artan sıcaklıkta incelenmiş, bunlar arasından La_0.9Sr_0.1Cr_0.5V_0.5O₃, LaSr_0.5V_0.5O₃ ve La_0.9Sr_0.1Cr_0.75Co_0.25O₃ bileşiklerinin daha iletken oldukları anlaşılmıştır.  

Anahtar Kelimeler

• Katalizör,elektrokatalizör,perovskit

Sulfur Resistant Perovskite Electrocatalysts for High Temperature Applications

Abstract

Owing to increasing demand for catalytic operations in clean and carbon negative energy systems, development of catalysts and electrocatalysts has been gaining importance and interest has been growing in mixed oxides (perovskites) that are known for their chemical and thermal stability. In the present work, some perovskite catalysts/electrocatalysts, mostly with structures ABO3 and AxA’(1-x)ByB’(1-y)O3 containing Co, Cr, La, Mo, Sr and V have been developed and studied in terms of electrical conductivity at increasing temperatures up to 1100 K. Among the samples,La0.9Sr0.1Cr0.5V0.5O3, LaSr0.5V0.5O3 ve La0.9Sr0.1Cr0.75Co0.25O3 had relatively higher conductivity.

Keywords

• Catalyst,Electrocatalyst,Perovskite

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