Data di Pubblicazione:
2004
Citazione:
CO selective oxidation on ceria-supported Au catalysts for fuel cell application / G., Panzera; V., Modafferi; S., Candamano; A., Donato; F., Frusteri; P. L., Antonucci; Donato, Andrea. - In: JOURNAL OF POWER SOURCES. - ISSN 0378-7753. - 135:(2004), pp. 177-183.
Abstract:
Ceria-supported Au catalysts for selective oxidation of CO under simulated fuel processing conditions for polymer electrolyte membrane
fuel cell (PEMFC) application were investigated. Fresh and used catalysts were characterized by X-ray diffraction, X-ray fluorescence
and transmission electron microscopy (TEM). The influence of catalyst heat treatment, reaction temperature, gas composition and space
velocity on CO conversion and CO2 selectivity has been evaluated. Air calcination at 500 ◦C resulted in the establishment of adequate
interfacial metal oxide properties which are essential to promote the selective CO oxidation. CO conversion close to 100% was obtained
at 120 ◦C, whereas CO2 selectivities not higher than 40% were obtained in the entire temperature range investigated (80–120 ◦C). The
presence of CO2 in the inlet stream negatively affected both CO conversion and CO2 selectivity. Both calcined and uncalcined Au/CeO2
catalysts resulted to be very stable, as demonstrated by 120 h endurance tests. TEM investigation of the used catalysts revealed that a
surface Au particles reconstruction occurred during reaction.
fuel cell (PEMFC) application were investigated. Fresh and used catalysts were characterized by X-ray diffraction, X-ray fluorescence
and transmission electron microscopy (TEM). The influence of catalyst heat treatment, reaction temperature, gas composition and space
velocity on CO conversion and CO2 selectivity has been evaluated. Air calcination at 500 ◦C resulted in the establishment of adequate
interfacial metal oxide properties which are essential to promote the selective CO oxidation. CO conversion close to 100% was obtained
at 120 ◦C, whereas CO2 selectivities not higher than 40% were obtained in the entire temperature range investigated (80–120 ◦C). The
presence of CO2 in the inlet stream negatively affected both CO conversion and CO2 selectivity. Both calcined and uncalcined Au/CeO2
catalysts resulted to be very stable, as demonstrated by 120 h endurance tests. TEM investigation of the used catalysts revealed that a
surface Au particles reconstruction occurred during reaction.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Au catalysts,; Ceria support,; Selective COoxidation,; PROX,; PEMFC
Elenco autori:
G., Panzera; V., Modafferi; S., Candamano; A., Donato; F., Frusteri; P. L., Antonucci; Donato, Andrea
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