1996
DOI: 10.1021/jp9537015
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New Uniform Solid Catalyst for the Low-Temperature Oxidation of Carbon Monoxide:  A Triple-Layered Rare Earth Perovskite Containing Co and Cu Ions

Abstract: Oxygen reactivity and catalytic activity of the cobalt-containing layered defect perovskites, YBa 2 Cu 2 CoO 7+δ and LaBa 2 Cu 2 CoO 7+δ , in comparison with LaBa 2 Cu 3 O 7-δ have been investigated employing temperatureprogrammed desorption (TPD) and temperature-programmed surface reactions (TPSR) in the stoichiometric and catalytic mode using carbon monoxide as a probe molecule. TPD studies showed evidence for the presence of two distinct labile oxygen species, one at (0 0 1/2) sites and the other at (0 1/2 … Show more

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Cited by 15 publications
(6 citation statements)
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“…This property has the following consequences toward CO oxidation: Indeed, YBa 2 Cu 3 O 7 has been found to be a good CO oxidation catalyst [38,39], because, one oxygen from YBa 2 Cu 3 O 7 is utilized for CO oxidation. Exposure to molecular oxygen to YBa 2 Cu 3 O 6 , the compound is regenerated qualifying it to be a catalyst.…”
Section: Noble Metal Ions As Adsorption Sitesmentioning
confidence: 99%
“…This property has the following consequences toward CO oxidation: Indeed, YBa 2 Cu 3 O 7 has been found to be a good CO oxidation catalyst [38,39], because, one oxygen from YBa 2 Cu 3 O 7 is utilized for CO oxidation. Exposure to molecular oxygen to YBa 2 Cu 3 O 6 , the compound is regenerated qualifying it to be a catalyst.…”
Section: Noble Metal Ions As Adsorption Sitesmentioning
confidence: 99%
“…4 Although the use of perovskites as catalysts, photocatalysts and electrocatalysts is widely accepted, only few trials were made to identify and quantify the active species responsible for their activity. 12,[27][28][29] The temperature programmed methods are widely used to study the availability of labile oxygen or the reactive oxygen at high temperature, but they fail in the determination of the in situ reactive oxygen. 12,[27][28][29] The temperature programmed methods are widely used to study the availability of labile oxygen or the reactive oxygen at high temperature, but they fail in the determination of the in situ reactive oxygen.…”
Section: Introductionmentioning
confidence: 99%
“…10,25 In most cases, the assessment of material goodness is simply made using the material in an applicative process, 11,26 or following the degradation of the materials via Temperature Programmed Reduction (TPR), Oxidation (TPO), Desorption (TPD) and O 2 -pulse measurements. 12,[27][28][29] The temperature programmed methods are widely used to study the availability of labile oxygen or the reactive oxygen at high temperature, but they fail in the determination of the in situ reactive oxygen. Other methods used to investigate qualitatively or quantitatively the oxygen availability of perovskite-type materials include X-ray photoelectron spectroscopy, 29,30 secondary ion mass spectrometry, isothermal isotope exchange 31 and oxygen isotopic exchange 28 for the surface oxygen, and thermogravimetric analyses, 10,11,32 diffuse reectance FTIR spectroscopy, 33 near edge X-ray absorption ne structure 11 and oxygen isotopic exchange 28 for the bulk oxygen.…”
Section: Introductionmentioning
confidence: 99%
“…Beside energy‐oriented applications, such as in SOFCs, RP‐type perovskites are used as catalysts in numerous heterogeneously catalyzed reactions. Among others, they are used as catalysts for oxidation of CO, decomposition of NO, combustion of methane, decomposition of N 2 O, or oxygen evolution reaction (OER) …”
Section: Introductionmentioning
confidence: 99%