Strong metal-support interaction between Pt and SiO<sub>2</sub> following high-temperature reduction: a catalytic interface for propane dehydrogenation

Liu, Deng; Miura, Hideo; Shishido, Tetsuya; Hosokawa, Saburo; Teramura, Kentaro; Tanaka, Tsunehiro

doi:10.1039/c7cc03859c

Cited by 65 publications

(48 citation statements)

References 16 publications

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“…Several strategies have been applied to improve the catalytic performance of Pt-based catalysts, including the addition of a second metal (e.g., Sn, Zn, Cu, Ce) as promoters [17,[20][21][22][23], the development of the synthesis method to obtain small Pt nanoclusters such as the atomic layer deposition (ALD) technique [24] and the development of metal-support interactions to change the electron density of Pt, which eventually leads to reducing the propylene adsorption, and then suppressing the further catalytic cracking [22,[25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

et al. 2019

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Propane dehydrogenation (PDH) is the extensive pathway to produce propylene, which is as a very important chemical building block for the chemical industry. Various catalysts have been developed to increase the propylene yield over recent decades; however, an active site of monometallic Pt nanoparticles prevents them from achieving this, due to the interferences of side-reactions. In this context, we describe the use of promoter-free hierarchical Pt/silicalite-1 nanosheets in the PDH application. The Pt dispersion on weakly acidic supports can be improved due to an increase in the metal-support interaction of ultra-small metal nanoparticles and silanol defect sites of hierarchical structures. This behavior leads to highly selective propylene production, with more than 95% of propylene selectivity, due to the complete suppression of the side catalytic cracking. Moreover, the oligomerization as a side reaction is prevented in the presence of hierarchical structures due to the shortening of the diffusion path length.

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Section: Introductionmentioning

confidence: 99%

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

et al. 2019

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“…The process is believed to be reversible by means of high-temperature oxygen treatment to re-oxidize the reduced species, which then reunites with the bulk support material 5,15 . The occurrence of the SMSI state is not restricted to metals supported on titania, with numerous reports describing a wide range of supports and active metals [17][18][19] . SMSI is, therefore, a fundamental phenomenon for supported metal catalysts.…”

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confidence: 99%

The dynamics of overlayer formation on catalyst nanoparticles and strong metal-support interaction

et al. 2020

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Heterogeneous catalysts play a pivotal role in the chemical industry. The strong metalsupport interaction (SMSI), which affects the catalytic activity, is a phenomenon researched for decades. However, detailed mechanistic understanding on real catalytic systems is lacking. Here, this surface phenomenon was studied on an actual platinum-titania catalyst by state-of-the-art in situ electron microscopy, in situ X-ray photoemission spectroscopy and in situ X-ray diffraction, aided by density functional theory calculations, providing a novel real time view on how the phenomenon occurs. The migration of reduced titanium oxide, limited in thickness, and the formation of an alloy are competing mechanisms during high temperature reduction. Subsequent exposure to oxygen segregates the titanium from the alloy, and a thicker titania overlayer forms. This role of oxygen in the formation process and stabilization of the overlayer was not recognized before. It provides new application potential in catalysis and materials science.

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“…found that a PtSn/CeO 2 catalyst prepared by the atom trapping method displayed highly selective and stable dehydrogenation performance as a result of the unique ability of CeO 2 to trap ionic Pt. Also silica, carbon, and Ga 2 O 3 have been tried as support for Pt‐based catalysts, but weak interaction between support and metal, poor regeneration performance and high cost could not be resolved.…”

Section: Recent Development Of Commercial Dehydrogenation Catalystsmentioning

confidence: 99%

Recent Progress in Commercial and Novel Catalysts for Catalytic Dehydrogenation of Light Alkanes

Wang

Zhu

2019

The Chemical Record

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Catalytic dehydrogenation of light alkanes can effectively produce olefins and hydrogen. Even though Pt and CrOx‐based catalysts are widely applied in industry, research to improve the activity and stability of these catalysts continued. This review summarizes important achievements obtained in recent years, focusing on the development of supports, promoters and preparation methods of Pt and CrOx‐based catalysts, which mainly aimed to improve the dispersion of the active species and to enhance coke resistance. Furthermore, the high cost of Pt‐based catalysts and environmental problems encountered with CrOx‐based catalysts have spurred the development of alternative catalysts. The dehydrogenation performances and characteristics of promising alternative VOx‐, modified Ni‐ and Sn‐based catalysts are also reviewed. Comparison with the catalytic reforming process of naphtha further probes the necessity of catalyst acidity in these two different processes. The choice of the dehydrogenation reactor is discussed, and future perspectives and research directions are indicated.

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Strong metal-support interaction between Pt and SiO₂ following high-temperature reduction: a catalytic interface for propane dehydrogenation

Cited by 65 publications

References 16 publications

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

The dynamics of overlayer formation on catalyst nanoparticles and strong metal-support interaction

Recent Progress in Commercial and Novel Catalysts for Catalytic Dehydrogenation of Light Alkanes

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Strong metal-support interaction between Pt and SiO2 following high-temperature reduction: a catalytic interface for propane dehydrogenation

Cited by 65 publications

References 16 publications

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

Dehydrogenation of Propane to Propylene Using Promoter-Free Hierarchical Pt/Silicalite-1 Nanosheets

The dynamics of overlayer formation on catalyst nanoparticles and strong metal-support interaction

Recent Progress in Commercial and Novel Catalysts for Catalytic Dehydrogenation of Light Alkanes

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Strong metal-support interaction between Pt and SiO₂ following high-temperature reduction: a catalytic interface for propane dehydrogenation