用于水煤气变换反应的新型微乳液制备的“二氧化铈负载铂”催化剂与传统“二氧化铈担载铂”催化剂的比较。

Comparison of new microemulsion prepared "Pt-in-Ceria" catalyst with conventional "Pt-on-Ceria" catalyst for water-gas shift reaction.

作者信息

Yeung Connie M Y, Meunier Frederic, Burch Robbie, Thompsett David, Tsang Shik Chi

出版信息

J Phys Chem B. 2006 May 4;110(17):8540-3. doi: 10.1021/jp061083u.

Abstract

New "Pt-in-CeO(2)" catalyst prepared by microemulsion method is shown to give higher activity for a water-gas shift reaction but with no formation of CH(4), the side product from hydrogenation of carbon oxides using a hydrogen-rich reformate as compared to conventional "Pt-on-CeO(2)" catalysts. Detailed characterization by DRIFT analysis and temperature programmed reduction presented in this work clearly suggest the ceria coverage on Pt inhibits the metal from forming a strong CO adsorption.

摘要

通过微乳液法制备的新型“Pt-in-CeO₂”催化剂在水煤气变换反应中表现出更高的活性，并且与传统的“Pt-on-CeO₂”催化剂相比，不会生成CO加氢的副产物CH₄。本工作中通过漫反射红外傅里叶变换光谱（DRIFT）分析和程序升温还原进行的详细表征清楚地表明，二氧化铈在铂上的覆盖抑制了金属形成强CO吸附。