Mesoporous NiO–CeO2 catalysts for CO oxidation: Nickel content effect and mechanism aspect

Tang, Changjin; Li, Jianchao; Yao, Xin‐Kan; Sun, Jingfang; Cao, Yuan; Zhang, Lei; Gao, Fei; Deng, Yu

doi:10.1016/j.apcata.2015.01.037

Cited by 106 publications

(69 citation statements)

References 62 publications

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“…In the electronic aspect, it was shown by charge density analysis that the electrons transferred from the Pd phase form Ce 3+ , and the electrons subsequently transfer to the adsorbed O 2 , leading to active oxygen species. Additionally, it was demonstrated that the charge transfer predominantly takes place in the bottom layer of Pd in direct contact with the support, indicating that charge transfer occurs at the interface between metal phase and oxide support …”

Section: Strategy To Improve Co Oxidation By Controlling the Interactmentioning

confidence: 99%

“…Additionally, it was demonstrated that the charge transfer predominantly takes place in the bottom layer of Pd in direct contact with the support, indicating that charge transfer occurs at the interface between metal phase and oxide support. [106][107][108][109] The SMSI is essential not only for the activity but also for tuning the resistance to the sintering of the metal phase. Metal particle strongly anchored to support does not easily migrate across the support and agglomerate.…”

Section: Strong Metal Support Interaction (Smsi) Of Metal-loaded Ceomentioning

confidence: 99%

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Design of Ceria Catalysts for Low‐Temperature CO Oxidation

et al. 2019

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A catalyst active to carbon monoxide (CO) oxidation at low temperature is essential for environmental conservation, saving fuel and improvement of the quality of human life. Rational design of CO oxidation catalyst on the basis of comprehensive understanding of physicochemical properties of catalytic materials, rather than simply searching for the catalyst based on trial‐and‐error, is a promising approach to meet the increasingly stringent regulations. This review covers metal‐doped and ‐loaded system based on CeO2 catalysts as strategies to significantly improve CO oxidation activity at low temperature. When incorporated into CeO2 lattice, active metals significantly lower the oxygen vacancy formation energy (Evf) of the catalyst surface, resulting in high catalytic activities at low temperature. When the active metals are loaded on the CeO2 surface, many active sites could be acquired by increasing the dispersion, and the catalytic activity can be dramatically improved by newly introducing the interfacial sites between the metals and the CeO2 support. Doping the support could further improve this loaded system in terms of specific surface area, oxygen vacancy formation, and spillover effects. In this review, based on this knowledge, we propose a rational design approach to a robust low‐temperature CO oxidation catalysts. The desirable CO oxidation catalysts identified from the interplay between theoretical and experimental approaches would ultimately improve the quality of human life, and create potential economic benefits by alleviating air pollution.

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Section: Strategy To Improve Co Oxidation By Controlling the Interactmentioning

confidence: 99%

Section: Strong Metal Support Interaction (Smsi) Of Metal-loaded Ceomentioning

confidence: 99%

Design of Ceria Catalysts for Low‐Temperature CO Oxidation

et al. 2019

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“…Catalytic CO oxidation is an attractive reaction with various industrial applications in CO 2 lasers, proton‐exchange membrane (PEM) fuel cells, catalytic converters, etc. . The precious metals supported on the reducible or irreducible oxides exhibit high activity in this reaction , .…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxidation of CO over Nanocrystalline La_1–xCe_xNiO₃ Perovskite‐Type Oxides

2019

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Nanocrystalline La1–xCexNiO3 (x = 0.1, 0.3, 0.5, 0.7, 0.9) perovskite‐type oxide catalysts prepared by the Pechini method were employed in catalytic CO oxidation and the effect of substitution of La by Ce on CO conversion was evaluated. The results indicated the remarkable effect of La substitution with Ce on the catalytic performance at low temperatures. The reaction temperature had a significant influence on the stability of the catalysts. The La0.1Ce0.9NiO3 sample exhibited the highest activity among the prepared catalysts in CO oxidation reaction. In addition, the influence of different parameters including pretreatment condition, feed ratio, and gas hourly space velocity (GHSV) on the catalytic performance was examined. The optimum catalyst proved high stability under severe reaction conditions in the presence of water vapor and CO2 in the feed stream.

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“…Primarily, increase in the specific surface areas of catalytic particles by decreasing particle size or thickness can result in a higher catalytic activity, and in addition, increase in the number of active sites such as corners and particle/support interfaces can also result in enhanced catalytic activity. Recently, supported NiO nanoparticles or thin films were suggested to be reactive for oxidative catalytic reactions, and much attention has been paid to the NiO-based catalysis [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Toluene oxidation catalyzed by NiO/SiO2 and NiO/TiO2/SiO2: Towards development of humidity-resistant catalysts

et al. 2016

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Mesoporous NiO–CeO2 catalysts for CO oxidation: Nickel content effect and mechanism aspect

Cited by 106 publications

References 62 publications

Design of Ceria Catalysts for Low‐Temperature CO Oxidation

Design of Ceria Catalysts for Low‐Temperature CO Oxidation

Catalytic Oxidation of CO over Nanocrystalline La_1–xCe_xNiO₃ Perovskite‐Type Oxides

Toluene oxidation catalyzed by NiO/SiO2 and NiO/TiO2/SiO2: Towards development of humidity-resistant catalysts

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Mesoporous NiO–CeO2 catalysts for CO oxidation: Nickel content effect and mechanism aspect

Cited by 106 publications

References 62 publications

Design of Ceria Catalysts for Low‐Temperature CO Oxidation

Design of Ceria Catalysts for Low‐Temperature CO Oxidation

Catalytic Oxidation of CO over Nanocrystalline La1–xCexNiO3 Perovskite‐Type Oxides

Toluene oxidation catalyzed by NiO/SiO2 and NiO/TiO2/SiO2: Towards development of humidity-resistant catalysts

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Catalytic Oxidation of CO over Nanocrystalline La_1–xCe_xNiO₃ Perovskite‐Type Oxides