1999
DOI: 10.1016/s0378-7753(99)00314-6
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Correlation between CO surface coverage and selectivity/kinetics for the preferential CO oxidation over Pt/γ-Al2O3 and Au/α-Fe2O3: an in-situ DRIFTS study

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Cited by 160 publications
(105 citation statements)
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“…To comprehend this behavior, the fact that cerium oxide has a strong tendency to provide active oxygens with strong oxidation power [6,12,25,26], which are however reactive towards both CO and H 2 , must be taken into account. This causes a drop of selectivity at higher temperature due to the higher activation energy of H 2 oxidation compared to that of CO [27][28][29][30].…”
Section: Catalytic Activitymentioning
confidence: 99%
“…To comprehend this behavior, the fact that cerium oxide has a strong tendency to provide active oxygens with strong oxidation power [6,12,25,26], which are however reactive towards both CO and H 2 , must be taken into account. This causes a drop of selectivity at higher temperature due to the higher activation energy of H 2 oxidation compared to that of CO [27][28][29][30].…”
Section: Catalytic Activitymentioning
confidence: 99%
“…Thus, the knowledge of the surface coverage at meaningful catalytic turnover is critical and has always been the motivation of extensive experimental efforts. 1,2,3 Unfortunately, only a very few number of experimental techniques are capable of deriving such information, the most important ones being the various forms of vibrational spectroscopies. In this manuscript we will experimentally assess the coverage of surface species under catalytic turnover and correlate these with the reactivity.…”
Section: Introductionmentioning
confidence: 99%
“…Recently, the preferential oxidation of CO in H 2 has been studied for applications in polymer electrolyte-type fuel cells (PEFCs) to reduce the CO con-centration in the produced fuel gases down to 10 ppm to prevent the fuel cell electrodes from being poisoned [4,5]. The outstanding catalytic activities of Pt, Rh, and Au are widely recognized [6][7][8][9][10][11]. A high activity for CO oxidation at higher reaction temperatures (150-250 • C) can be obtained on Pt catalysts; however, the competitive adsorption of CO and O 2 decreases the low-temperature activity of the catalysts [8,10].…”
Section: Introductionmentioning
confidence: 99%
“…The outstanding catalytic activities of Pt, Rh, and Au are widely recognized [6][7][8][9][10][11]. A high activity for CO oxidation at higher reaction temperatures (150-250 • C) can be obtained on Pt catalysts; however, the competitive adsorption of CO and O 2 decreases the low-temperature activity of the catalysts [8,10]. The reaction mechanism has also been extensively investigated over these catalysts [10,11].…”
Section: Introductionmentioning
confidence: 99%