Morphology and electronic properties of Ni supported on Mn-doped CeO2(1 1 1) thin films

Ginting, Elfrida; Du, Linze; Zhou, Jing

doi:10.1016/j.apsusc.2020.145850

Cited by 3 publications

(2 citation statements)

References 70 publications

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“…Its intrinsic chemical nature, namely, oxygen vacancies generated from the transition of Ce 4+ to Ce 3+ , are extraordinarily beneficial to the enhancement of catalytic activity of active metal and even produce the function of synergistic catalysis. 13,14 In addition, with regard to some harsh catalytic reactions, supported active metals are easily subject to sintering, carbon deposition, and leaching. In response to these issues, more attention is paid to the study of encapsulated catalysts, aiming to resist the disturbance of reaction environment.…”

Section: Introductionmentioning

confidence: 99%

“…A representative metal oxide CeO 2 is frequently used as catalyst support for loading active metal. Its intrinsic chemical nature, namely, oxygen vacancies generated from the transition of Ce 4+ to Ce 3+ , are extraordinarily beneficial to the enhancement of catalytic activity of active metal and even produce the function of synergistic catalysis. , In addition, with regard to some harsh catalytic reactions, supported active metals are easily subject to sintering, carbon deposition, and leaching. In response to these issues, more attention is paid to the study of encapsulated catalysts, aiming to resist the disturbance of reaction environment. , A novel Ni catalyst with sandwich structure in which the Ni nanoparticles were encapsulated between silica and ceria has been prepared for methane dry reforming, and the confinement effect of the sandwiched core–shell structure enhanced the coke resistance of the Ni catalyst .…”

Section: Introductionmentioning

confidence: 99%

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Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Wang

Wei

et al. 2021

Energy Fuels

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Two-dimensional (2D) metallic Pd nanosheets were synthesized by an ion-exchange method using PdCl4 2– and magnesium- and aluminum-based metallic (LDH) as intercalation ion and host material, respectively. The LDH-supported Pd catalyst (Pd/LDH) presented two kinds of existing forms of Pd species comprising Pd nanosheets and nanoparticles. Characterizations by FT-IR spectra and HAADF-STEM images revealed that the Pd nanosheets were intercalated into the sandwich layer of hydrotalcite. The Pd/LDH catalyst was probed for the catalytic hydrogenation of nitrobenzene to aniline, and the Pd/LDH catalyst exhibited excellent catalytic activity with a high TOF value of 133.8 h–1, much higher than that of 97.3 h–1 on LDH-supported Pd nanoparticles catalyst. The results indicated that the catalytic activity of the formed Pd nanosheets was far higher than that of Pd nanoparticles. The edges of 2D Pd nanosheets, due to its negatively electronic property as well as unsaturated coordination, could be the main reason for the enhanced catalytic hydrogenation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Wang

Wei

et al. 2021

Energy Fuels

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Defect engineering for high-selection-performance of N2 activation over CeO2(111) surface

Yuan

Sun

et al. 2022

Chinese Chemical Letters

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The Triple Component Interface of Ni–Co–Ce: Growth, Chemical State, and Stability of NiCo Bimetallic Particles on Reducible CeO₂(111) Thin Films

Paudyal,

Ara,

Du Hill

et al. 2024

J. Phys. Chem. C

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The growth of NiCo particles at low coverages over reducible CeO 2 (111) thin films producing a triple interface between Ni−Co−Ce was investigated by scanning tunneling microscopy (STM) and X-ray photoelectron spectroscopy (XPS), which was compared to that of monometallic Ni and Co particles. XPS data show that deposition of either Ni or Co on CeO 2 at 300 K causes a partial reduction of Ce 4+ cations to Ce 3+ ions. At 0.3 monolayer (ML), XPS detects Co 2+ on CeO 2 . However, both Ni 0 and Ni 2+ are present as major species at 300 K and annealing causes a significant increase of Ni 2+ in Ni particles. Deposition of 0.3 ML Co over 0.3 ML Ni on CeO 2 at 300 K induces reduction of Ni 2+ to metallic Ni and Ni 0 was found as predominant species. Unlike for Co/CeO 2 , metallic Co was also present over the Co−Ni/CeO 2 surface in addition to Co 2+ . This behavior indicates the formation of NiCo bimetallic particles with the possibility of Co diffusion to the interface of Ni/ceria. With heating, the intermixing of Ni and Co atoms in bimetallic particles on CeO 2 was facilitated.Furthermore, oxidation of both metals and ceria occurred as a result of the diffusion of lattice oxygen from the bulk of ceria to the surface. A slight increase in Ni 2+ was observed after heating Co−Ni/CeO 2 to 500 K or higher. Co became Co 2+ with heating to 800 K. Our STM results confirm the formation of NiCo bimetallic particles on CeO 2 at 300 K and further suggest that the addition of Co can help inhibit the sintering of Ni particles at higher temperatures. Bimetallic particles were also obtained by depositing Ni over existing Co particles on CeO 2 . However, our XPS data demonstrate that the deposition order of Co and Ni plays a role in the chemical state of these two metals in bimetallic particles, likely attributed to the difference in their compositions at the bimetallic particle surface as well as the metal−support interface.

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Morphology and electronic properties of Ni supported on Mn-doped CeO2(1 1 1) thin films

Cited by 3 publications

References 70 publications

Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Defect engineering for high-selection-performance of N2 activation over CeO2(111) surface

The Triple Component Interface of Ni–Co–Ce: Growth, Chemical State, and Stability of NiCo Bimetallic Particles on Reducible CeO₂(111) Thin Films

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Morphology and electronic properties of Ni supported on Mn-doped CeO2(1 1 1) thin films

Cited by 3 publications

References 70 publications

Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Two-Dimensional Pd Nanosheets with Enhanced Catalytic Activity for Selective Hydrogenation of Nitrobenzene to Aniline

Defect engineering for high-selection-performance of N2 activation over CeO2(111) surface

The Triple Component Interface of Ni–Co–Ce: Growth, Chemical State, and Stability of NiCo Bimetallic Particles on Reducible CeO2(111) Thin Films

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Product

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The Triple Component Interface of Ni–Co–Ce: Growth, Chemical State, and Stability of NiCo Bimetallic Particles on Reducible CeO₂(111) Thin Films