Journal
CATALYSIS TODAY
Volume 339, Issue -, Pages 24-31Publisher
ELSEVIER
DOI: 10.1016/j.cattod.2019.01.014
Keywords
CeO2/CuO-Mn; WGS; Hydrogen production; Biomass utilization
Funding
- Ministerio de Economia, Industria y Competitividad [CTQ2015-71283-R]
- U.S. Department of Energy (Chemical Sciences Division) [DE-SC0012704]
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In this work, the behavior of a novel manganese-promoted inverse CeO2/CuO catalyst under water-gas shift (WGS) reaction conditions is studied. CeO2/CuO and CeO2/Mn-CuO catalysts are characterized by X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS). Structure/activity relationships and redox characteristics are established on the basis of such results along with those of in situ XRD and X-ray absorption fine structure (XAFS) experiments performed either under WGS or CO-temperature programmed reduction (TPR) conditions. The manganese coprecipitated together with the copper during the preparation of the samples and the Mn-CuO phase strongly affected the size and chemical properties of the catalytically-active ceria nanoparticles. A manganese-induced enhancement on the WGS activity was observed. Differences in the characteristics of the supported ceria particles are proposed as most relevant to explain the observed Mn-promoting effect.
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