作者：Gallo, A.;Pirovano, C.;Marelli, M.;Psaro, R.;Dal Santo, V.;

作者单位：CNR, Istituto di Scienze Tecnologie Molecolari, Via G. Fantoli 16/15, Milano, 20138, Italy;CNR, Istituto di Scienze Tecnologie Molecolari, Via G. Fantoli 16/15, Milano, 20138, Italy;CNR, Istituto di Scienze Tecnologie Molecolari, Via G. Fantoli 16/15, Mil

刊名：Chemical vapor deposition

ISSN：0948-1907

出版年：2010-01-05

卷：16

期：41194

起页：305

止页：310

分类号：TQ175

语种：英文

关键词：Glycerol;Hydrogen;Ruthenium;Steam reforming;Tin;

内容简介

Bimetallic Ru-Sn heterogeneous catalysts for glycerol steam reforming (SR) to hydrogen-rich mixtures are developed using organometallic (OM)CVD of commercial metal precursors as the preparation technique of choice. This methodology produces monometallic Ru nanoparticles (NPs) supported on Mg(Al)O mixed oxide with high activity and selectivity for glycerol SR. The effect of tin doping is studied on a set of catalysts with various Sn loadings. Materials produced are characterized by high resolution transmission electron microscopy (HRTEM) and by diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)-quadrupole mass spectrometry (QMS) of adsorbed CO and tested in glycerol SR. At low load, tin is almost selectively deposited on Ru NP faces, and resulting Ru-exposed sites show a higher specific activity than Ru exposed sites in monometallic catalysts. Monometallic Ru and bimetallic Ru-Sn heterogeneous catalysts were prepared by CVD of Ru(TMHD)_3 and Sn(n-Bu)_4 precursors on Mg(Al)O mixed oxide support. Ru/Mg(Al)O system was very efficient and durable in the hydrogen production by glycerol steam reforming. The effect of tin addiction was investigated and at low loadings it selectively decorates Ru faces sites leaving exposed the most active Ru sites.