Unknown

Dataset Information

0

A Rational Design of the Sintering-Resistant Au-CeO? Nanoparticles Catalysts for CO Oxidation: The Influence of H? Pretreatments.

ABSTRACT: The redox pretreatment of samples is one of the crucial ways of altering the catalytic properties of the supported noble metal materials in many heterogeneous reactions. Here, H?-reducing pretreatment is reported to enhance the thermal stability of Au-CeO? catalysts prepared by the deposition?precipitation method and calcination at 600 °C for CO oxidation. In order to understand the improved activity and thermal stability, a series of techniques were used to characterize the physico-chemical changes of the catalyst samples. H? pretreatment may lead to: (i) a strong metal?support interaction (SMSI) between Au nanoparticles (NPs) and CeO?, evidenced by the particular coverage of Au NPs by CeO?, electronic interactions and CO adsorption changes. (ii) the production of surface bicarbonates which can accelerate CO oxidation. As a result, the H? pretreatment makes the Au NPs more resistant to sintering at high temperature and enhances the CO oxidation activity. Furthermore, this reduction pretreatment strategy may provide a potential approach to enhance the thermal-stability of other supported noble metal catalysts.

SUBMITTER: Sun Y 

PROVIDER: S-EPMC6213528 | biostudies-literature | 2018 Oct

REPOSITORIES: biostudies-literature

Json Xml
altmetric image

Publications

A Rational Design of the Sintering-Resistant Au-CeO₂ Nanoparticles Catalysts for CO Oxidation: The Influence of H₂ Pretreatments.

Sun Yuqi Y   Liu Wei W   Tian Miao M   Wang Liguo L   Wang Zhongpeng Z  

Materials (Basel, Switzerland) 20181012 10

The redox pretreatment of samples is one of the crucial ways of altering the catalytic properties of the supported noble metal materials in many heterogeneous reactions. Here, H₂-reducing pretreatment is reported to enhance the thermal stability of Au-CeO₂ catalysts prepared by the deposition⁻precipitation method and calcination at 600 °C for CO oxidation. In order to understand the improved activity and thermal stability, a series of techniques were used to characterize the physico-chemical cha  ...[more]

Similar Datasets

Unknown Relationship between hydrothermal temperatures and structural properties of CeO<sub>2</sub> and enhanced catalytic activity of propene/toluene/CO oxidation by Au/CeO<sub>2</sub> catalysts.
| S-EPMC9532521 | biostudies-literature
Unknown Ag surface segregation in nanoporous Au catalysts during CO oxidation.
| S-EPMC6185915 | biostudies-literature
Unknown Biomimetic Au/CeO<sub>2</sub> Catalysts Decorated with Hemin or Ferrous Phthalocyanine for Improved CO Oxidation <i>via</i> Local Synergistic Effects.
| S-EPMC7721650 | biostudies-literature
Unknown Atomic level fluxional behavior and activity of CeO<sub>2</sub>-supported Pt catalysts for CO oxidation.
| S-EPMC8490411 | biostudies-literature
Unknown Morphology effects on surface chemical properties and lattice defects of Cu/CeO<sub>2</sub> catalysts applied for low-temperature CO oxidation.
| S-EPMC6700188 | biostudies-literature
Unknown Synthesis of Ordered Mesoporous CuO/CeO? Composite Frameworks as Anode Catalysts for Water Oxidation.
| S-EPMC5304801 | biostudies-other
Unknown The Dynamic Structure of Au<sub>38</sub>(SR)<sub>24</sub> Nanoclusters Supported on CeO<sub>2</sub> upon Pretreatment and CO Oxidation.
| S-EPMC7295362 | biostudies-literature
Unknown Metal Phosphate-Supported Pt Catalysts for CO Oxidation.
| S-EPMC5456429 | biostudies-literature
Unknown Oxidation of Dichloromethane over Au, Pt, and Pt-Au Containing Catalysts Supported on ?-Al2O3 and CeO2-Al2O3.
| S-EPMC7587384 | biostudies-literature
Unknown Structural Evolution of Bimetallic PtPd/CeO<sub>2</sub> Methane Oxidation Catalysts Prepared by Dry Milling.
| S-EPMC8283761 | biostudies-literature