Partially embedding Pt nanoparticles in the skeleton of 3DOM Mn2O3: An effective strategy for enhancing catalytic stability in toluene combustion

Pei, Wenbo; Liu, Yuxi; Deng, Jiguang; Zhang, Kunfeng; Hou, Zhiquan; Zhao, Xingtian; Dai, Hongxing

doi:10.1016/j.apcatb.2019.117814

Cited by 119 publications

(59 citation statements)

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“…The peak values of Pt 2+ severally situated in around 72.4 and 75.8 eV. The rest of the peaks were between 73.4 eV and 73.7 eV, and 77.6‐77.9 eV were connected with Pt 4+ species, respectively [49,50] . In Table 1, the surface Pt species composition of the Pt@CeO 2 −R and Pt@CeO 2 −B samples was 51.0% and 48.0%, respectively, far lower than the 75.0% of Pt/CeO 2 −R sample.…”

Section: Resultsmentioning

confidence: 92%

“…The rest of the peaks were between 73.4 eV and 73.7 eV, and 77.6-77.9 eV were connected with Pt 4 + species, respectively. [49,50] In Table 1, the surface Pt species composition of the Pt@CeO 2 À R and Pt@CeO 2 À B samples was 51.0% and 48.0%, respectively, far lower than the 75.0% of Pt/CeO 2 À R sample. The above phenomenon may illustrate that some Pt nanoparticles were implanted into the cavity of CeO 2 carrier, which was corresponding with TEM observations.…”

Section: Morphology Features Analysismentioning

confidence: 97%

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Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Han

Dong

et al. 2022

Chemistry An Asian Journal

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In this work, Pt@CeO 2 catalysts with a nanorod structure (Pt@CeO 2 À R) and a bunch structure (Pt@CeO 2 À B) were synthesized through an in-situ encapsulation strategy of Pt species in Ce-MOFs, respectively. It was discovered that the Pt@CeO 2 À R catalyst possessed the best catalytic performance for toluene catalytic combustion, and this result was mainly caused by the confinement of Pt nanoparticles in CeÀ MOFs, which was related to the chemical state of Pt species, redox ability, and the amount of active oxygen species. The Pt@CeO 2 À R catalyst contained more Ce 3 + species, rich Pt 4 + species, and abundant active oxygen species due to the existence of the confined effect, which was conducive to promote catalytic oxidation of toluene. In addition, the Pt@CeO 2 À R catalyst also exhibited more redox ability, which may speed up the catalytic reaction rates. On the contrary, the Pt/CeO 2 À R catalyst was synthesized through a simple impregnation method and exhibited the poor activity for toluene catalytic combustion due to poor Pt 4 + species and active oxygen species. Therefore, this work provides a feasible experimental basis for the study of different morphologies and encapsulated metal nanoparticles.

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Section: Resultsmentioning

confidence: 92%

Section: Morphology Features Analysismentioning

confidence: 97%

Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Han

Dong

et al. 2022

Chemistry An Asian Journal

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“…The following references appear in the supplemental information: Kondratowicz et al. (2020) ; Liu et al., 2019c ; Pei et al. (2019) ; Wang et al.…”

Section: Supporting Citationsmentioning

confidence: 99%

Efficient catalytic combustion of toluene at low temperature by tailoring surficial Pt0 and interfacial Pt-Al(OH)x species

Deng

Shen

et al. 2021

iScience

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Summary Exploring highly efficient and low-cost supported Pt catalysts is attractive for the application of volatile organic compounds (VOCs) combustion. Herein, efficient catalytic combustion of toluene at low temperature over Pt/γ-Al 2 O 3 catalysts has been demonstrated by tailoring active Pt species spatially. Pt/γ-Al 2 O 3 catalyst with low Pt-content (0.26 wt%) containing both interfacial Pt-Al(OH) x and surficial metallic Pt (Pt 0 ) species exhibited super activity and water-resistant stability for toluene oxidation. The strong metal-support interaction located at the Al-OH-Pt interfaces elongated the Pt-O bond and contributed to the oxidation of toluene. Meanwhile, the OH group at the Al-OH-Pt interfaces had the strongest adsorption and activation capability for toluene and the derived intermediate species were subsequently oxidized by oxygen species activated by surficial Pt 0 to yield carbon dioxide and water. This work initiated an inspiring sight to the design of active Pt species for the VOCs combustion.

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“…The enhanced performance was correlated with the higher dispersion of PtPd NPs within the SiO 2 shell after aging. For the purpose of enhancing the thermal stability of Pt toluene combustion catalysts without inducing severe mass transport limitations, Pei and co-workers [175] developed an in situ synthesis method to partially embed Pt NPs into three-dimensionally ordered macroporous (3DOM) Mn 2 O 3 , whereby the Mn 2 O 3 structure consists of a three-dimensional structure with ordered spherical macropores (>50 nm) which is prepared by a colloidal template method [176]. 2.3 wt% Pt/Mn 2 O 3 -3DOM exhibited the best catalytic performance.…”

Section: Oxidation Reactionsmentioning

confidence: 99%

Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition

et al. 2020

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Supported nanoparticles are commonly applied in heterogeneous catalysis. The catalytic performance of these solid catalysts is, for a given support, dependent on the nanoparticle size, shape, and composition, thus necessitating synthesis techniques that allow for preparing these materials with fine control over those properties. Such control can be exploited to deconvolute their effects on the catalyst’s performance, which is the basis for knowledge-driven catalyst design. In this regard, bottom-up synthesis procedures based on colloidal chemistry or atomic layer deposition (ALD) have proven successful in achieving the desired level of control for a variety of fundamental studies. This review aims to give an account of recent progress made in the two aforementioned synthesis techniques for the application of controlled catalytic materials in gas-phase catalysis. For each technique, the focus goes to mono- and bimetallic materials, as well as to recent efforts in enhancing their performance by embedding colloidal templates in porous oxide phases or by the deposition of oxide overlayers via ALD. As a recent extension to the latter, the concept of area-selective ALD for advanced atomic-scale catalyst design is discussed.

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Partially embedding Pt nanoparticles in the skeleton of 3DOM Mn2O3: An effective strategy for enhancing catalytic stability in toluene combustion

Cited by 119 publications

References 50 publications

Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Efficient catalytic combustion of toluene at low temperature by tailoring surficial Pt0 and interfacial Pt-Al(OH)x species

Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition

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Partially embedding Pt nanoparticles in the skeleton of 3DOM Mn2O3: An effective strategy for enhancing catalytic stability in toluene combustion

Cited by 119 publications

References 50 publications

Construction of a Nanorod Structure‐Confined Pt@CeO2 Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Construction of a Nanorod Structure‐Confined Pt@CeO2 Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Efficient catalytic combustion of toluene at low temperature by tailoring surficial Pt0 and interfacial Pt-Al(OH)x species

Designing Nanoparticles and Nanoalloys for Gas-Phase Catalysis with Controlled Surface Reactivity Using Colloidal Synthesis and Atomic Layer Deposition

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Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene

Construction of a Nanorod Structure‐Confined Pt@CeO₂ Catalyst by an In‐Situ Encapsulation Strategy for Low‐Temperature Catalytic Oxidation of Toluene