Catalytic oxidation of VOCs over 3D@2D Pd/CoMn2O4 nanosheets supported on hollow Al2O3 microspheres

He, Jiaqin; Zheng, Fangfang; Zhou, Yuanbo; Li, Xunxun; Wang, Yaru; Xiao, Jun; Li, Youyong; Chen, Dongyun; Lu, Jianmei

doi:10.1016/j.jcis.2022.01.023

Cited by 40 publications

(11 citation statements)

References 49 publications

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“…Previous studies have confirmed that oxygen vacancies at a moderate concentration can promote the oxidation process of VOCs, while excessive oxygen vacancies can slow down the reaction speed. 40 These results indicate that acid etching can effectively regulate the concentration of oxygen vacancies, thus affecting the reaction rate and changing the catalytic activity.…”

Section: ■ Results and Discussionmentioning

confidence: 95%

Pt Nanoparticles and NiO Nanosheets on Ni Foam for Photothermal Degradation of Toluene

Gao

Zhang

et al. 2022

ACS Appl. Nano Mater.

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The construction of highly efficient metal foam-based monolithic catalysts is essential for promoting the exploration of photothermal catalytic oxidation of volatile organic compounds (VOCs) in practical application. Herein, Pt nanoparticles and NiO nanosheets directly grown on Ni foam via the substitution and acid etching-assisted method are prepared and applied in photothermal degradation of toluene. The HCl etching can tune the concentration of oxygen vacancies of the monolithic catalyst and motivate the synergetic effect of Pt nanoparticles and NiO nanosheets. Meanwhile, the obtained monolithic catalysts have strong light absorption capacity and highly efficient conversion of light-to-heat ability. Benefiting from these, the Pt/NF-A2 sample shows the good performance toward photothermal degradation of toluene. These findings may provide insights into the design of efficient metal foam-based monolithic industrial catalysts for photothermal degradation of VOCs.

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Section: ■ Results and Discussionmentioning

confidence: 95%

Pt Nanoparticles and NiO Nanosheets on Ni Foam for Photothermal Degradation of Toluene

Gao

Zhang

et al. 2022

ACS Appl. Nano Mater.

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“…The electronic interaction between Ce 4+ and Co 2+ weakened the Co–O bond and enhanced the migration of lattice oxygen, and the strong interaction between Pd and the support increased the concentration of adsorbed oxygen. Hollow hierarchical microspheres loaded with Pd nanoparticles were successfully constructed through the vertical in situ growth of 2D CoMn 2 O 4 spinel nanosheets on hollow Al 2 O 3 and then introducing Pd species (Figure E) . The formation of Al 2 O 3 /CoMn 2 O 4 heterostructure was conducive to the adsorption and activation of oxygen.…”

Section: Design Strategies Of Spinel Catalystmentioning

confidence: 99%

Section: Design Strategies Of Spinel Catalystmentioning

confidence: 99%

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Recent Advances of VOCs Catalytic Oxidation over Spinel Oxides: Catalyst Design and Reaction Mechanism

Shan

Wang

et al. 2023

Environ. Sci. Technol.

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Volatile organic compounds (VOCs) harm the environment and human health and have been of wide concern and purified efficiently by catalytic oxidation. Spinel oxides, mainly composed of transition metal elements with low price and extensive sources, have been widely investigated as efficient and stable catalysts for VOCs oxidation due to their adjustable element composition, flexible structure, and high thermal/chemical stability. However, it is necessary to dissect the design of the spinel in a targeted way to satisfy the removal of different types of VOCs. This article systematically summarizes the recent advances regarding the application of spinel oxides for VOCs catalytic oxidation. Specifically, the design strategies of spinel oxides were first introduced to clarify their effect on the structure and properties of the catalyst. Then the reaction mechanism and degradation pathway of different kinds of VOCs on the spinel oxides were in detail summarized, and the characteristic requirements of the spinel oxides for various VOCs purification were analyzed. Furthermore, the practice applications were also discussed. Finally, the prospects were proposed to guide the rational design of spinel-based catalysts for VOCs purification and intensify the understanding of reaction mechanisms.

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“…Spinel-type transition metal oxides (S-TMOs) exhibit strong MSIs due to their reducibility, making them suitable for stabilizing noble metal nanoparticles. − The interaction between S-TMOs and PdO was investigated by Song et al, who found that the strong interaction between PdO and spinel support promoted the dispersion and crystallization of PdO. Additionally, the outstanding low-temperature reducibility of the spinel support prevented PdO particle sintering and water adsorption .…”

Section: Introductionmentioning

confidence: 99%

Surface Defect Engineering on Constructing High-Performance Noble Metal Active Sites: A Simple and Cost-Effective Path to High-Performance Oxidation Catalysts

Yang,

Si,

Peng

et al. 2023

ACS Catal.

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Catalytic combustion is an efficient technology for the removal of volatile organic compounds (VOCs) as pollutants. Traditionally, noble metal catalysts have been used for the removal of VOCs. In this study, a Pd-CMO-AT60 catalyst with a highperformance active site (Pd−V O −Mn) was synthesized through an alkali treatment method. The catalyst demonstrated high catalytic activity and stability in toluene combustion compared to those of supported and doped Pd-based catalysts (Pd/CMO and Pd-CMO). At a temperature of 240 °C, the combustion rate of toluene on Pd-CMO-AT60 (8.24 × 10 −8 mol•m −2 •s −1 ) was found to be 6.87 times and 11.12 times higher than that on supported and doped Pd-based catalysts (Pd/CMO (1.20 × 10 −8 mol•m −2 •s −1 ) and Pd-CMO (7.41 × 10 −9 mol•m −2 •s −1 )), respectively. The alkali treatment led to a reduction in the oxygen coordination of Pd on the Pd-CMO surface and introduced an active site, Pd−V O −Mn. Moreover, the copper coordination of lattice oxygen on the Pd-CMO-AT60 surface was also diminished, enhancing the mobility of the lattice oxygen. Oxygen was more easily adsorbed and dissociated on the Pd−V O −Mn site of Pd-CMO-AT60, and the dissociated oxygen on this site exhibited higher oxidation ability. Additionally, activated lattice oxygen lacking metal coordination on the Pd-CMO-AT60 surface displayed high oxidation performance. This study provides a simple and cost-effective approach for constructing highperformance noble metal active centers and serves as a reference for the development of Pd-based catalytic combustion catalysts.

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Catalytic oxidation of VOCs over 3D@2D Pd/CoMn2O4 nanosheets supported on hollow Al2O3 microspheres

Cited by 40 publications

References 49 publications

Pt Nanoparticles and NiO Nanosheets on Ni Foam for Photothermal Degradation of Toluene

Pt Nanoparticles and NiO Nanosheets on Ni Foam for Photothermal Degradation of Toluene

Recent Advances of VOCs Catalytic Oxidation over Spinel Oxides: Catalyst Design and Reaction Mechanism

Surface Defect Engineering on Constructing High-Performance Noble Metal Active Sites: A Simple and Cost-Effective Path to High-Performance Oxidation Catalysts

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