Title:
Crystal-Plane Effect of Ceria on the Activity of Au/CeO2 for Preferential CO Oxidation
Author(s):
Carltonbird, M., Luengnaruemitchai, A.
Document(s):
Paper
Poster
Abstract:
Hydrogen accounts for the main source for on-board hydrogen in fuel cell applications. However, the anode of fuel cells can be poisoned by carbon monoxide (CO) in hydrogen stream. Ceria (CeO2) has been regarded as an interesting support for many reactions including preferential CO oxidation due to its unique properties. The morphology of ceria is one of the important factors that significantly affects the properties such as reactive exposedcrystal plane for reaction, surface area and oxygen storage capacity (OSC) including metal dispersion of catalyst. Gold-based catalyst has been considered as a potential catalyst for preferential CO oxidation. Recently, it was reported that the catalytic activity of Au catalysts strongly depended on the shape of ceria. In the present work, hydrothermal method was used to synthesize ceria. The effect of hydrothermal temperature ranging from 100 to 140 °C under 6 M of NaOH concentration on the morphology of the prepared ceria was investigated. The crystallite size of CeO2 varies from 14.54 nm to 19.01 nm as temperature increase from 100 °C to 140 °C. The resulting catalytic activity was found that Au supported on CeO2 prepared at 140 °C exhibited the highest CO conversion.
Keywords:
hydrogen, low temperature, preferential oxidation
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Gasification for power, CHP and polygeneration
Event:
25th European Biomass Conference and Exhibition
Session:
2CV.3.62
Pages:
867 - 870
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-2CV.3.62
Price:
FREE
