Catalytic behavior of Ru supported on Ce0.8Zr0.2O2 for hydrogen production

GOMEZ MANUEL F.; ANDRADE GAMBA JULIO; CONDÓ ADRIANA; ABELLO MA. CRISTINA; CARBAJAL RAMOS ALEJANDRA; BENGIÓ S; GENNARI FABIANA

APPLIED CATALYSIS B-ENVIRONMENTAL

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2016 vol. 181 p. 58 - 70

0926-3373

Ru (2 wt.%) on Ce0.8Zr0.2O2 catalysts produced by two synthesis methods, one co-precipitation (PI) and the other mechanochemical reaction (MR), were investigated for their ethanol steam reforming (ESR) performance. Characterization of the catalysts before and after ESR were performed using X-ray powder diffraction (XRPD), nitrogen physisorption, CO chemisorption, temperature programmed reduction (TPR), high resolution transmission electron microscopy (HR-TEM), thermogravimetry and X-ray photoelectron spectroscopy (XPS) measurements. The Ru (2 wt.%) PI catalyst exhibited the best activity and selectivity to hydrogen, without coke deposition during catalytic operating, even when it is compared with Ni (8 wt.%) PI catalyst. A brief revision of the probably reaction pathway was presented. The remarkable catalytic performance of Ru (2 wt.%) PI was interpreted as a combination of factors, including improved metal dispersion on Ce0.8Zr0.2O2, favorable metal-support interaction and water gas shift reaction promotion.