Modification of the oxygen storage capacity of CeO2–ZrO2 mixed oxides after redox cycling aging

Fally, F.; Perrichon, V.; Vidal, Hilario; Kašpar, Jan; Blanco, Ginesa; Pintado, José; Bernal, S.; Colón, G.; Daturi, Marco; Lavalley, Jean‐Claude

doi:10.1016/s0920-5861(00)00302-3

Cited by 194 publications

(130 citation statements)

References 25 publications

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“…For example, it has been found that the addition of zirconia to ceria allows for reduction of the bulk oxide to occur at lower temperatures. 15 A mixed ceria−alumina catalyst was found to have redox properties similar to those of mixed ceria-zirconia catalysts in that the bulk ceria was more easily reduced. 16 Properties like these may potentially be of importance in ketonization as it has been suggested that catalyst redox characteristics may play a role in the reaction mechanism.…”

Section: Introductionmentioning

confidence: 95%

CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

Snell

Shanks

2014

ACS Catal.

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Ketonization of the model bio-oil compound acetic acid was performed in a toluene-solvent condensed phase using five different CeMOx catalysts. The catalysts were characterized using a number of different techniques both before and after reaction testing to gain understanding of how material traits influence their catalytic performance. A number of potentially important catalytic properties were found to be of little importance for the respective reaction. For instance, it was discovered that there was no direct correlation between prereaction surface area with activity for ketonization at high or at low temperatures. Furthermore, better reducibility of the oxide did not appear to correlate with improved ketonization rates. XRD of postreaction materials used at different temperatures demonstrated the reaction temperature regime influenced whether the crystal structure of the fresh mixed oxide was disrupted. The precise temperature regimes were different, depending on composition of the catalytic material. Catalytic activity was then found to be maximized when metal carboxylate formation and subsequent decomposition of the carboxylate were appropriately balanced. ABSTRACT: Ketonization of the model bio-oil compound acetic acid was performed in a toluene-solvent condensed phase using five different CeMO x catalysts. The catalysts were characterized using a number of different techniques both before and after reaction testing to gain understanding of how material traits influence their catalytic performance. A number of potentially important catalytic properties were found to be of little importance for the respective reaction. For instance, it was discovered that there was no direct correlation between prereaction surface area with activity for ketonization at high or at low temperatures. Furthermore, better reducibility of the oxide did not appear to correlate with improved ketonization rates. XRD of postreaction materials used at different temperatures demonstrated the reaction temperature regime influenced whether the crystal structure of the fresh mixed oxide was disrupted. The precise temperature regimes were different, depending on composition of the catalytic material. Catalytic activity was then found to be maximized when metal carboxylate formation and subsequent decomposition of the carboxylate were appropriately balanced.

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Section: Introductionmentioning

confidence: 95%

CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

Snell

Shanks

2014

ACS Catal.

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“…Cerium-based catalysts with the presence of transition metals have attracted increasingly attention in recent years due to their high oxygen storage capability (OSC). Various CeO 2 -based catalysts, such as CeO 2 -Al 2 O 3 [5], CeO 2 -SiO 2 [6], CeO 2 -La 2 O 3 [5], CeO 2 -HfO 2 [7], CeO 2 -CuO [8] and CeO 2 -ZrO 2 [9][10][11], have been investigated with the aim of increase the thermal stability and the OSC of CeO 2 . The important role of ceria played in catalytic reactions is reported to be the generation and participation of surface oxygen species and anionic vacancies in the catalytic reactions [12].…”

Section: Introductionmentioning

confidence: 99%

Reduction property and catalytic activity of Ce1−XNiXO2 mixed oxide catalysts for CH4 oxidation

Shan

Luo

Ying

et al. 2003

Applied Catalysis A: General

280

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“…However, the actual ceria loading is lower than the nominal values for all the samples, which may be due to the fact that not all the amount of ceria employed during the preparation was actually incorporated in the catalysts. to the surface reduction of ceria which is not in close contact with the platinum particles, whereas the broad peak at high temperatures corresponds to the bulk reduction of ceria [22][23][24]. The TPR profiles of the chlorinated supported catalysts display similar features to Pt/CeO 2 (Cl), with two overlapping peaks in the temperature range from 355…”

Section: Icp-oesmentioning

confidence: 93%

Effect of the metal precursor on the properties of Pt/CeO2/C catalysts for the total oxidation of ethanol

et al. 2015

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. Toluene hydrogenation has been used to obtain an estimation of the platinum dispersion on the investigated catalysts. On the other hand, their catalytic behavior has been evaluated in the total oxidation of ethanol, selected as a VOCs probe molecule. A much higher catalytic activity and selectivity to CO2 was achieved with chlorinated catalysts. This behavior has been correlated with a high platinum dispersion and a strong metal-CeO2 interaction in these catalysts which promotes their redox properties. This is a previous version of the article published in Catalysis Today. 2015Today. , 249: 109-116. doi:10.1016Today. /j.cattod.2014 Highlights -Highly efficient catalysts for the complete oxidation of ethanol have been developed.-The use of CeO 2 as promoter is optimized by dispersing it over the activated carbon surface.-Impact of the platinum precursor (chlorinated or Cl-free) on the catalytic activity.-Pt/CeO 2 /C catalysts are more active than Pt/CeO 2 . K, ICP, XRD, H 2 -TPR and XPS). Toluene hydrogenation has been used to obtain an estimation of the platinum dispersion on the investigated catalysts. On the other hand, their catalytic behavior has been evaluated in the total oxidation of ethanol, selected as a VOCs probe molecule. A much higher catalytic activity and selectivity to CO 2 was achieved with chlorinated catalysts. This behavior has been correlated with a high platinum dispersion and a strong metal-CeO 2 interaction in these catalysts which promotes their redox properties.

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Modification of the oxygen storage capacity of CeO2–ZrO2 mixed oxides after redox cycling aging

Cited by 194 publications

References 25 publications

CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

Reduction property and catalytic activity of Ce1−XNiXO2 mixed oxide catalysts for CH4 oxidation

Effect of the metal precursor on the properties of Pt/CeO2/C catalysts for the total oxidation of ethanol

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Modification of the oxygen storage capacity of CeO2–ZrO2 mixed oxides after redox cycling aging

Cited by 194 publications

References 25 publications

CeMOx-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

CeMOx-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

Reduction property and catalytic activity of Ce1−XNiXO2 mixed oxide catalysts for CH4 oxidation

Effect of the metal precursor on the properties of Pt/CeO2/C catalysts for the total oxidation of ethanol

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CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase

CeMO_x-Promoted Ketonization of Biomass-Derived Carboxylic Acids in the Condensed Phase