Noble metal ion substituted CeO2 catalysts: Electronic interaction between noble metal ions and CeO2 lattice

Hegde,; Beraba, Parthasarathi

doi:10.1016/j.cattod.2015.03.035

Cited by 85 publications

(78 citation statements)

References 130 publications

(173 reference statements)

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“…[36][37][38] However, the common disadvantage of the latter is that a substantial amount of the noble metal is atomically dispersed in the bulk. [36][37][38] As a result, the density of the noble-metal sites at the surface is low. An increase of the noble metal loading in doped oxides, on the other hand, often gives rise to metallic particles at the surface.…”

Section: Introductionmentioning

confidence: 99%

“…An increase of the noble metal loading in doped oxides, on the other hand, often gives rise to metallic particles at the surface. 36 Different strategies are applied to increase the density of the atomically dispersed species at the surface. These include grafting of the atomically dispersed metals, the use of stabilizing ligands, and nanostructuring of the support.…”

Section: Introductionmentioning

confidence: 99%

“…In this respect, the use of metal oxides allows employing metal-support interactions to achieve a strong binding between the metal and the support. [34][35][36] Conceptually, oxide supported noble metal SACs are closely related to noble metal-doped oxides. [36][37][38] However, the common disadvantage of the latter is that a substantial amount of the noble metal is atomically dispersed in the bulk.…”

Section: Introductionmentioning

confidence: 99%

“…[34][35][36] Conceptually, oxide supported noble metal SACs are closely related to noble metal-doped oxides. [36][37][38] However, the common disadvantage of the latter is that a substantial amount of the noble metal is atomically dispersed in the bulk. [36][37][38] As a result, the density of the noble-metal sites at the surface is low.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Oxide-based nanomaterials for fuel cell catalysis: the interplay between supported single Pt atoms and particles

Lykhach

Bruix

Fabris

et al. 2017

Catal. Sci. Technol.

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The concept of single atom catalysis offers maximum noble metal efficiency for the development of lowcost catalytic materials. Among possible applications are catalytic materials for proton exchange membrane fuel cells. In the present review, recent efforts towards the fabrication of single atom catalysts on nanostructured ceria and their reactivity are discussed in the prospect of their employment as anode catalysts.The remarkable performance and the durability of the ceria-based anode catalysts with ultra-low Pt loading result from the interplay between two states associated with supported atomically dispersed Pt and subnanometer Pt particles. The occurrence of these two states is a consequence of strong interactions between Pt and nanostructured ceria that yield atomically dispersed species under oxidizing conditions and sub-nanometer Pt particles under reducing conditions. The square-planar arrangement of four O atoms on {100} nanoterraces has been identified as the key structural element on the surface of the nanostructured ceria where Pt is anchored in the form of Pt 2+ species. The conversion of Pt 2+ species to subnanometer Pt particles is triggered by a redox process involving Ce 3+ centers. The latter emerge due to either oxygen vacancies or adsorption of reducing agents. The unique properties of the sub-nanometer Pt particles arise from metal-support interactions involving charge transfer, structural flexibility, and spillover phenomena. The abundance of specific adsorption sites similar to those on {100} nanoterraces determines the ideal (maximum) Pt loading in Pt-CeO x films that still allows reversible switching between the atomically dispersed Pt and sub-nanometer particles yielding high activity and durability during fuel cell operation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Oxide-based nanomaterials for fuel cell catalysis: the interplay between supported single Pt atoms and particles

Lykhach

Bruix

Fabris

et al. 2017

Catal. Sci. Technol.

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“…Thus, the high energy electrons generated by the discharge will be mainly used for the dissociation of O 2 molecules. [21][22][23] The number of N 2 split is lesser With the increase of O 2 content and power. O 2 was generated by NO which was reduced and joined from outside will also affect the density of high energy electron number.…”

Section: The Effect Of N 2 On the Performance Of Plasma Denitrificationmentioning

confidence: 99%

Synergistic catalytic removal NOX and the mechanism of plasma and hydrocarbon gas

Zhang

Xiangling

et al. 2016

AIP Advances

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This paper using a method of catalytic adsorption combined with dielectric barrier discharge plasma which added to hydrocarbon gases. The different background gases, different dielectric properties and different pore sizes of the hydrolysis coke on the denitrification performance was studied. The effect of the coaction of plasma and the different properties of the removal of NO in flue gas was investigated, and the catalytic mechanism of the synergistic effect of plasma and hydrocarbon gas was discussed. The results shown that: The denitrification rate was significantly affected by plasma power and the initial concentration of NO; the reaction was restrained by the presence of oxygen and greatly promoted by the hydrocarbon gases. The permittivity of the catalyst has a great influence on the activity and the porous structure of the catalyst can obviously promote the reaction when the low temperature plasma combined with hydrocarbon gases.

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Solution Combustion Synthesis, Characterization, and Catalytic Properties of Oxide Materials

Bera

Aruna

2017

Nanotechnology in Catalysis

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Noble metal ion substituted CeO2 catalysts: Electronic interaction between noble metal ions and CeO2 lattice

Cited by 85 publications

References 130 publications

Oxide-based nanomaterials for fuel cell catalysis: the interplay between supported single Pt atoms and particles

Oxide-based nanomaterials for fuel cell catalysis: the interplay between supported single Pt atoms and particles

Synergistic catalytic removal NOX and the mechanism of plasma and hydrocarbon gas

Solution Combustion Synthesis, Characterization, and Catalytic Properties of Oxide Materials

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