Formation of active oxygen species on single-atom Pt catalyst and promoted catalytic oxidation of toluene

Zhao, Shunzheng; Wen, Yuqing; Liu, Xijun; Pen, Xianyun; Lü, Fang; Gao, Feifei; Xie, Xizhou; Du, Chao; Yi, Honghong; Kang, Dongjuan; Tang, Xiaolong

doi:10.1007/s12274-020-2765-1

Cited by 111 publications

(55 citation statements)

References 53 publications

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“…Generally, the catalyst reactivity can be enhanced by increasing the number of exposed active sites. Single‐atom catalysts (SACs) represent the ultimate small‐size limit to maximize the metal atom efficiency and expose the most active sites in catalysts, which is significantly important for supported noble metal catalysts, [8–10] and have shown superior catalytic activity and selectivity in some selective oxidation reactions [11–14] . For example, single‐site mesoporous Pd/Al 2 O 3 exhibits excellent allylic alcohols activity and aldehydes selectivity [15] .…”

Section: Introductionmentioning

confidence: 99%

Isolated Single‐Atom Ruthenium Anchored on Beta Zeolite as an Efficient Heterogeneous Catalyst for Styrene Epoxidation

Yang

Liu

et al. 2020

ChemNanoMat

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Exploring high‐performance styrene epoxidation catalysts is of great significance. However, it still remains a challenge to synthesize heterogeneous catalysts that simultaneously possess excellent styrene activity and styrene oxide selectivity. Herein, we report a heterogeneous isolated single‐atom Ru supported on microporous Beta zeolite (Ru1/Beta) catalyst fabricated by a wet impregnation method. We reveal that the extraframework AlOH groups on Beta zeolite are responsible for anchoring Ru species, which is determined by 27Al MAS NMR analyses. The abundant AlOH on microporous Beta zeolite can lead to single‐atom ruthenium dispersion, thereby resulting in marked enhanced catalytic performance in styrene epoxidation than Ru cluster on Beta zeolite. The turnover frequency (TOF) value of Ru1/Beta reaches 353 h−1, 3.8 times over Ru cluster. The unique styrene oxide selectivity is attributed to the isolated single‐atom Ru anchoring on the Lewis acid site (AlOH) of Beta zeolite, which hinders the further ring opening of styrene oxide to phenylacetaldehyde and cleavage of the double bond of styrene to benzaldehyde.

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Section: Introductionmentioning

confidence: 99%

Isolated Single‐Atom Ruthenium Anchored on Beta Zeolite as an Efficient Heterogeneous Catalyst for Styrene Epoxidation

Yang

Liu

et al. 2020

ChemNanoMat

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“…Zhao and co‐workers [118] synthesized a MgO nanosheets Pt SAC and tested it for toluene oxidation. This SAC demonstrated optimum activity for toluene oxidation, with a T 50 and T 90 of 160 °C and 220 °C, respectively (100 ppm toluene, 36 L g −1 h −1 ).…”

Section: Sacs For Hc Oxidationmentioning

confidence: 99%

Single‐atom Automobile Exhaust Catalysts

Zhang

Fan

et al. 2020

ChemNanoMat

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Single-atom catalysts (SACs) with isolated metal centers are attracting great research interest because of their maximized metal utilization rates and unique structures. In the last decade, significant efforts have been made to design highly efficient and cost-effective SACs with applications in automobile exhaust aftertreatment. SACs have not only demonstrated their high potential for improving the catalytic performance of current automobile exhaust catalysts but also provided an ideal platform for understanding the origins of catalyst reactivity. In this review, we summarize the general strategies for promoting the reactivity of metal SACs while maintaining their thermal stability during exhaust-abatement-related reactions. Highlights are provided on wellperformed SACs for CO oxidation, unburnt hydrocarbon (HC) oxidation, and the selective catalytic reduction of NO x. The reaction mechanism and structure-performance relationship of SAC during these reactions are also discussed. Finally, perspectives are given on the trending research fields for designing more efficient single-atom automobile exhaust catalysts in the future.

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“…Introducing coordinating atoms containing lone pairs of electrons [36][37][38][39] (such as N, P, S) on the carrier can enhance the interaction between the metal and the carrier and prevent the migration and agglomeration of single atoms. (3) Graphene with containing oxygen functional groups [40,41] or metal oxides [42][43][44][45]. It forms a strong chemical bond with a single metal atom, so as to achieve the purpose of stabilizing a single metal atom.…”

Section: Introductionmentioning

confidence: 99%

Single atom catalysts by atomic diffusion strategy

Lin

Chen

2021

Nano Res.

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The depletion of energy and increasing environmental pressure have become one of the main challenges in the world today. Synthetic high-efficiency catalysts bring hope for efficient conversion of energy and effective treatment of pollutants, especially, single-atom catalysts (SACs) are promising candidates. Herein, we comprehensively summarizes the atomic diffusion strategy, which is considered as an effective method to prepare a series of SACs. According to the different diffusion forms of the precursors, we review the synthesis pathways of SACs from three aspects: gas diffusion, solid diffusion and liquid diffusion. The gaseous diffusion method mainly discusses atomic layer deposition (ALD) and chemical vapor deposition (CVD), both of which carry out gas phase mass transfer at high temperatures. The solid-state diffusion method can be divided into nanoparticle transformation into single atoms and solid atom migration. Liquid diffusion mainly describes the electrochemical method and the molten salt method. We hope this review can trigger the rational design of SACs.

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Formation of active oxygen species on single-atom Pt catalyst and promoted catalytic oxidation of toluene

Cited by 111 publications

References 53 publications

Isolated Single‐Atom Ruthenium Anchored on Beta Zeolite as an Efficient Heterogeneous Catalyst for Styrene Epoxidation

Isolated Single‐Atom Ruthenium Anchored on Beta Zeolite as an Efficient Heterogeneous Catalyst for Styrene Epoxidation

Single‐atom Automobile Exhaust Catalysts

Single atom catalysts by atomic diffusion strategy

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