The rod-like CeO2 supported by the low-loading Au nanoparticles for the efficient catalytic oxidation of CO at room temperature

Cui, Xiuxiu; Zhang, Xu; Yang, Zhichao; Xiao, Mingjing; Ren, Jie; Xiao, Xuechun; Wang, Yude

doi:10.1016/j.ijhydene.2022.01.218

Cited by 20 publications

(4 citation statements)

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“…Additionally, Pt/CeO 2 catalysts based on nanosized CeO 2 have been developed, which exhibit excellent activity and unique selectivity in various catalytic reactions due to their small particle size, a large number of unsaturated active sites, and unique electronic structures [ 13 ]. A recent work [ 14 ] produced a composite material by combining CeO 2 nanorods with gold nanoparticles, which demonstrated remarkable catalytic activity in converting CO to CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

et al. 2023

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In this work, CeO2 nanoparticles, as well as CeO2 nanocomposites with plasmonic silver nanoparticles, were synthesized using a simple sol-gel process. The concentration of silver in the composites varied from 0.031–0.25 wt%. Cerium hydroxide dried gel was calcined at temperatures from 125 to 800 °C to obtain CeO2. It was shown that, at an annealing temperature of 650 °C, single-phase CeO2 nanopowders with an average particle size in the range of 10–20 nm can be obtained. The study of acid-base properties showed that with an increase in the calcination temperature from 500 to 650 °C, the concentration of active centers with pKa 9.4 and 6.4 sharply increases. An analysis of the acid-base properties of CeO2-Ag nanocomposites showed that with an increase in the silver concentration, the concentration of centers with pKa 4.1 decreases, and the number of active centers with pKa 7.4 increases. In a model experiment on dye photodegradation, it was shown that the resulting CeO2 and CeO2-Ag nanopowders have photocatalytic activity. CeO2-Ag nanocomposites, regardless of the silver concentration, demonstrated better photocatalytic activity than pure nanosized CeO2.

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Section: Introductionmentioning

confidence: 99%

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

et al. 2023

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“…Compared with the noble metal-based catalysts, CeO 2 is much cheaper and shows good performance in heterogeneous catalytic reactions [7][8][9] owing to the oxygen storage capacity (OSC) and Ce 3+ /Ce 4+ redox couple. [10][11][12] CeO 2 nanorods could achieve 100% CO conversion efficiency at about 270 1C in the flue gas containing 1% CO due to the exposed reactive {001} and {110} planes. 9 When the flue gas contained SO 2 , cerium species were easily poisoned by SO 2 to form cerium sulfates deposited on the catalyst surface, causing the loss of catalytic active sites.…”

Section: Introductionmentioning

confidence: 99%

Ce–Fe bimetallic oxide catalysts for CO catalytic oxidation at a high concentration of SO₂

Gao,

Dong,

et al. 2023

New J. Chem.

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“…Catalytic CO oxidation is one of the most favorable methods to convert CO to CO 2 . Heterogeneous catalysts allow CO to be oxidized in a considerably low-temperature range of 50–150 °C [ 15 , 16 , 17 , 18 ]. In addition, they show high efficiency and a variety of applications, which has fostered progress in both fundamental lab-scale research and practical industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…Various metal oxides such as SiO 2 , TiO 2 , Fe 2 O 3 , CeO 2 , etc., have been used as support materials for CO oxidation [ 15 , 25 , 26 , 27 , 28 , 29 , 30 ]. Among the various oxide support materials, metal oxides having high oxygen storage capability, oxygen mobility and redox properties have been widely known for their ability to significantly improve the catalytic performance of the supported metal catalysts in CO oxidation reactions [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Crystalline Properties of Hollow Ceria Nanostructures on a CuO-CeO2 Catalyst in CO Oxidation

et al. 2022

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The development of an efficient and economic catalyst with high catalytic performance is always challenging. In this study, we report the synthesis of hollow CeO2 nanostructures and the crystallinity control of a CeO2 layer used as a support material for a CuO-CeO2 catalyst in CO oxidation. The hollow CeO2 nanostructures were synthesized using a simple hydrothermal method. The crystallinity of the hollow CeO2 shell layer was controlled through thermal treatment at various temperatures. The crystallinity of hollow CeO2 was enhanced by increasing the calcination temperature, but both porosity and surface area decreased, showing an opposite trend to that of crystallinity. The crystallinity of hollow CeO2 significantly influenced both the characteristics and the catalytic performance of the corresponding hollow CuO-CeO2 (H-Cu-CeO2) catalysts. The degree of oxygen vacancy significantly decreased with the calcination temperature. H-Cu-CeO2 (HT), which presented the lowest CeO2 crystallinity, not only had a high degree of oxygen vacancy but also showed well-dispersed CuO species, while H-Cu-CeO2 (800), with well-developed crystallinity, showed low CuO dispersion. The H-Cu-CeO2 (HT) catalyst exhibited significantly enhanced catalytic activity and stability. In this study, we systemically analyzed the characteristics and catalyst performance of hollow CeO2 samples and the corresponding hollow CuO-CeO2 catalysts.

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The rod-like CeO2 supported by the low-loading Au nanoparticles for the efficient catalytic oxidation of CO at room temperature

Cited by 20 publications

References 63 publications

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Ce–Fe bimetallic oxide catalysts for CO catalytic oxidation at a high concentration of SO₂

Effects of the Crystalline Properties of Hollow Ceria Nanostructures on a CuO-CeO2 Catalyst in CO Oxidation

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The rod-like CeO2 supported by the low-loading Au nanoparticles for the efficient catalytic oxidation of CO at room temperature

Cited by 20 publications

References 63 publications

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Acid-Base and Photocatalytic Properties of the CeO2-Ag Nanocomposites

Ce–Fe bimetallic oxide catalysts for CO catalytic oxidation at a high concentration of SO2

Effects of the Crystalline Properties of Hollow Ceria Nanostructures on a CuO-CeO2 Catalyst in CO Oxidation

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Ce–Fe bimetallic oxide catalysts for CO catalytic oxidation at a high concentration of SO₂