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

I.A. CARBAJAL-RAMOS; M.F. GOMEZ; A.M. CONDÓ; S. BENGIÓ; J.J. ANDRADE-GAMBOA; M.C. ABELLO; F.C. GENNARI

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 were investigated to test their ethanol steam reforming (ESR) performance. The supports were obtained through two different synthesis methods: co-precipitation (PI)and mechanochemical reaction (MR). Characterization of the catalysts, before and after ESR, were performed using X-ray powder diffraction (XRPD), nitrogen physisorption, CO chemisorption, temperatureprogrammed 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 highest activity and selectivity to hydrogen and no coke deposition was observed during catalytic operation, even when compared to Ni (8 wt.%) PI catalyst. A possible reaction pathway isproposed. The remarkably good catalytic performance of Ru (2 wt.%) PI is regarded as being due to acombination of factors: improved metal dispersion on Ce0.8Zr0.2O2, favorable metal-support interactionand water gas shift reaction promotion.