Tailoring the surface structure of iron compounds to optimize the selectivity of 3-nitrostyrene hydrogenation reaction over Pt catalyst

Zhang, Ying; Gao, Tongtong; Dai, Chengshan; Zhang, Liyun; Niu, Yiming; Chen, Junnan; Liu, Zhao‐Tie; Zhang, Bingsen

doi:10.1016/j.cclet.2021.10.049

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…Nevertheless, no 3-ENB was detected during the whole reaction. The results indicate that Co significantly improves the activity of Pt for the selectivity to 3-VA, which is derived from the fact that introducing Co regulates the electronic state of Pt, making it more favorable for the adsorption of NO than CC bonds. , In addition, the smaller particle size and excellent dispersion of PtCo NPs are also conducive to improving the activity of the catalyst and the selectivity to 3-VA . Moreover, the product distribution and the 3-NS conversion and selectivity of different products with time were investigated, and the results are shown in Figure S9.…”

Section: Resultsmentioning

confidence: 99%

“…32 The catalytic performance of the catalysts was assessed under the same reaction conditions, and the results are presented in Figure 4b− VA, which is derived from the fact that introducing Co regulates the electronic state of Pt, making it more favorable for the adsorption of N�O than C�C bonds. 33,34 In addition, the smaller particle size and excellent dispersion of PtCo NPs are also conducive to improving the activity of the catalyst and the selectivity to 3-VA. 35 Moreover, the product distribution and the 3-NS conversion and selectivity of different products with time were investigated, and the results are shown in Figure S9. The conversion of 3-NS increased with extension of the reaction time, and the conversion was almost complete (>99%) at 30 min; meanwhile, the selectivity of 3-VA reached 74.43% at 30 min and hardly changed with extension of the reaction time.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

Gao

Liu

Zhong

et al. 2023

ACS Appl. Nano Mater.

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Selective hydrogenation of substituted nitroaromatic compounds to produce functionalized anilines is both pivotal and challenging. Supported bimetallic catalysts usually exhibit enhanced selectivity in this reaction because of the distinctive synergetic effect of two metals, such as the effect of electron state regulation. Herein, a series of Y-zeolite-supported PtCo nanoparticle (NP) bimetallic catalysts with varied Pt contents were designed and synthesized at different temperatures, and Y-zeolite-supported PtFe/PtNi NP bimetallic catalysts were prepared. The catalytic performances were investigated in the chemoselective hydrogenation of 3-nitrostyrene (3-NS). When combined with various characterization techniques, the PtCo/Y (3.0 wt % Pt, 300 °C) catalyst showed optimal performances with 74.43% 3-vinylaniline (3-VA) selectivity at 99.75% 3-NS conversion. The results can be attributed to the introduction of Co, which regulates the electronic state and structure of Pt, thus significantly improving the selectivity to 3-VA. This work exposes a creative opportunity for designing and synthesizing more efficient supported metal catalysts at the nanoscale.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

Gao

Liu

Zhong

et al. 2023

ACS Appl. Nano Mater.

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“…Catalysts speed up a chemical reaction by providing lower activation energy without participating in the reaction. The word “catalysis” originates from Greek “κατα” and “λυσισ” which means “down” and “loosening”, respectively. − With the catalyst providing for a rapid and efficient method, the reactions were improved toward a better rate and selectivity at generally gentle conditions . Catalytic technologies have been a fundamental part of modern human advancement. − The Egyptians and the Sumerian utilized catalytic forms to produce alcohol.…”

Section: Introductionmentioning

confidence: 99%

MOFs as Versatile Catalysts: Synthesis Strategies and Applications in Value-Added Compound Production

et al. 2023

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Catalysts played a crucial role in advancing modern human civilization, from ancient times to the industrial revolution. Due to high cost and limited availability of traditional catalysts, there is a need to develop cost-effective, high-activity, and nonprecious metal-based electrocatalysts. Metal−organic frameworks (MOFs) have emerged as an ideal candidate for heterogeneous catalysis due to their physicochemical properties, hybrid inorganic/organic structures, uncoordinated metal sites, and accessible organic sections. MOFs are high nanoporous crystalline materials that can be used as catalysts to facilitate polymerization reactions. Their chemical and structural diversity make them effective for various reactions compared to traditional catalysts. MOFs have been applied in gas storage and separation, ion-exchange, drug delivery, luminescence, sensing, nanofilters, water purification, and catalysis. The review focuses on MOF-enabled heterogeneous catalysis for value-added compound production, including alcohol oxidation, olefin oligomerization, and polymerization reactions. MOFs offer tunable porosity, high spatial density, and single-crystal XRD control over catalyst properties. In this review, MOFs were focused on reactions of CO 2 fixation, CO 2 reduction, and photoelectrochemical water splitting. Overall, MOFs have great potential as versatile catalysts for diverse applications in the future.

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Support Morphology Effect on Selective Hydrogenation of 3‐Nitrostyrene to 3‐Vinylaniline over Pt/α‐Fe₂O₃ Catalysts

Dai

Zhang

Chen

et al. 2022

Chemistry A European J

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Selective hydrogenation of substituted nitroaromatic compounds is an extremely important and challenging reaction. Supported metal catalysts attract much attention in this reaction because the properties of metal nanoparticles (NPs) can be modified by the nature of the support. Herein, the support morphology on the catalytic performance of selective hydrogenation of 3‐nitrostyrene to 3‐vinylaniline was investigated. Pt NPs supported on octadecahedral α‐Fe2O3 supports with a truncated hexagonal bipyramid shape (Pt/α‐Fe2O3‐O) and rod‐shaped α‐Fe2O3 supports (Pt/α‐Fe2O3‐R) were prepared by glycol reduction method. Detailed characterizations reveal that the electronic structure and dispersion of Pt NPs can be modified by the supports. The Pt/α‐Fe2O3‐O catalyst exhibited superior catalytic performance for hydrogenation of 3‐nitrostyrene because of its low coordinated Pt sites and the small Pt NPs size, which is benefit from the high‐index exposed surfaces of truncated hexagonal bipyramid‐shaped α‐Fe2O3 support. The structural evolution during the catalytic reaction was investigated in detail by identical location transmission electron microscopy (IL‐TEM) method, which found that the high cycling activity of Pt/α‐Fe2O3‐O catalyst during the cycle experiment results from the stability of Pt NPs.

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Tailoring the surface structure of iron compounds to optimize the selectivity of 3-nitrostyrene hydrogenation reaction over Pt catalyst

Cited by 7 publications

References 29 publications

Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

MOFs as Versatile Catalysts: Synthesis Strategies and Applications in Value-Added Compound Production

Support Morphology Effect on Selective Hydrogenation of 3‐Nitrostyrene to 3‐Vinylaniline over Pt/α‐Fe₂O₃ Catalysts

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Tailoring the surface structure of iron compounds to optimize the selectivity of 3-nitrostyrene hydrogenation reaction over Pt catalyst

Cited by 7 publications

References 29 publications

Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

Structural Regulation of PtCo/Y Zeolite Catalysts for the Selective Hydrogenation of 3-Nitrostyrene to 3-Vinylaniline

MOFs as Versatile Catalysts: Synthesis Strategies and Applications in Value-Added Compound Production

Support Morphology Effect on Selective Hydrogenation of 3‐Nitrostyrene to 3‐Vinylaniline over Pt/α‐Fe2O3 Catalysts

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Support Morphology Effect on Selective Hydrogenation of 3‐Nitrostyrene to 3‐Vinylaniline over Pt/α‐Fe₂O₃ Catalysts