Design of Bimetallic Catalysts: From Model Surfaces to Supported Catalysts

Bosco, Jeffrey P.; Humbert, Michael P.; Chen, Jingguang G.

doi:10.1002/9783527625321.ch8

Cited by 8 publications

(9 citation statements)

References 34 publications

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“…It is well-known that bimetallic catalysts often show different and superior properties from the corresponding monometallic catalysts due to several reasons such as smaller particle sizes of bimetallic catalysts, modifications of the electronic structure through a ligand effect, different geometry of the bimetallic structure, and better ability of the bimetallic surface to bind with adsorbates. 21 In the current case, both Pt− Cu and Pt−Ru particles were smaller than the corresponding monometals, thereby increasing the particle surface area and active sites. All catalysts were nanometric in size, loaded on a porous polymer matrix.…”

Section: Methodsmentioning

confidence: 69%

Hydrogenation of Styrene Oxide to 2-Phenyl Ethanol over Polyurea Microencapsulated Mono- and Bimetallic Nanocatalysts: Activity, Selectivity, and Kinetic Modeling

Yadav

Lawate

2013

Ind. Eng. Chem. Res.

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Styrene oxide is an important precursor to prepare 2-phenyl ethanol (2-PEA) of high quality for its use as a fragrance chemical. Styrene oxide was selectively hydrogenated to 2-PEA with polyurea-microencapsulated (EnCat) Pd, Pd–Rh and Pd–Cu nanocatalysts with methanol as solvent and NaOH as promoter. The catalysts were fully characterized to understand their activity, selectivity, and stability. Pd–Cu EnCat was used for further studies. Complete conversion of styrene oxide with 92% selectivity to 2-PEA was obtained over Pd–Cu EnCat at 333 K and 607.8 kPa. Effects of various parameters were studied to understand the product profile. A bifunctional Langmuir-Hinshelwood-Hougen-Watson (LHHW) mechanistic model was proposed. The kinetics of reaction was established and tested against experimental data. The results are new and provide a green and cost-effective process for the synthesis of 2-PEA.

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Section: Methodsmentioning

confidence: 69%

Hydrogenation of Styrene Oxide to 2-Phenyl Ethanol over Polyurea Microencapsulated Mono- and Bimetallic Nanocatalysts: Activity, Selectivity, and Kinetic Modeling

Yadav

Lawate

2013

Ind. Eng. Chem. Res.

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“…Usually, bimetal catalysts exhibit superior performance in terms of activity and selectivity than their single metal counterparts. More specifically, such improvement is closely related to the alterations in the morphology, microstructure, and electronic structure of the metals. , In 2016, Daniel et al prepared a bimetallic catalyst comprising of the most efficient catalyst for hydrogenation (Ru based) and dehydrogenation (Pd based) for the NEC/12-NEC pair. It was confirmed that the performance of the catalyst can be controlled by choosing a specific Pd to Ru metal ratio, among which the bimetallic Pd 2 Ru@SiCN catalyst is particularly promising in that it exhibits superior performance in achieving complete conversion with regards to both hydrogenation and dehydrogenation without significant decay in the hydrogen storage capacity .…”

Section: Heterogeneous Thermocatalysismentioning

confidence: 99%

Recent Advances of Catalysis in the Hydrogenation and Dehydrogenation of N-Heterocycles for Hydrogen Storage

Tan

Chua

et al. 2021

J. Phys. Chem. C

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Lack of efficient hydrogen storage method is one of the technical bottlenecks for the implementation of hydrogen energy. Liquid organic hydrogen carriers (LOHCs), especially Nheterocycles, have been considered as potential candidates for both on-board and off-board hydrogen storage owing to their low cost, high gravimetric hydrogen storage capacity, reversibility, and compatibility with the existing infrastructures with minimal modification. LOHCs however encounter severe kinetic barriers in the hydrogen uptake and release processes, and thus efficient catalysts are critically needed. Much attention has been given to the design and development of catalysts for the reversible hydrogenation and dehydrogenation of N-heterocycles. In this Mini-Review Article, we summarize recent activities in advancing those compounds for hydrogen storage through thermo-, photo-, and electrocatalysis, aiming to provide a guidance for rational catalyst design. At the end of the Mini-Review Article, challenges and future research directions of the catalyst design in the LOHCs field are discussed.

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“…The addition of another metal causing alteration in the electron density of the system (ligand effect) and the metal-metal bond length change (strain effect) may lead to improved catalytic activity. 140,141 The incorporation of a second metal into the structure may also prevent the poisoning of the catalyst and prolong its aging behavior. 142,143 Synergetic electronic effects towards catalytic reactions can also be significant in alloy or core-shell nanoparticles via the introduction of a change in the dband center of the metal via the addition of second metal.…”

Section: Functional Materials For Electrochemical Applications Using ...mentioning

confidence: 99%

Review—Supercritical Deposition: A Powerful Technique for Synthesis of Functional Materials for Electrochemical Energy Conversion and Storage

Barim

Uzunlar

Bozbağ

et al. 2020

J. Electrochem. Soc.

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Supercritical fluid-based technologies are increasingly being used to develop novel functional nanostructured materials or improve the properties of existing ones. Among these, supercritical deposition (SCD) is an emerging technique to incorporate metals on supports. It has been used to deposit a wide variety of single or multi-metallic morphologies such as highly dispersed species, nanoparticles, nanorods and conformal films on high surface area supports, polymers and crystalline substrates. SCD is also attracting increasing attention for preparation of micro or nano-architectured functional materials in a highly controllable manner for electrochemical energy conversion and storage systems. Increasing number of studies in the literature demonstrates that materials synthesized using SCD are comparable or superior in performance as compared to their conventional counterparts. In this review, an overview of the fundamentals of the SCD technique is presented. Properties of a wide variety of nanostructured functional materials such as supported nanoparticles and films prepared using SCD for electrochemical applications are summarized. The electrochemical performance of these materials in electrochemical tests and also in fuel cells, electrolyzers and Li-ion batteries are also presented.

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Design of Bimetallic Catalysts: From Model Surfaces to Supported Catalysts

Cited by 8 publications

References 34 publications

Hydrogenation of Styrene Oxide to 2-Phenyl Ethanol over Polyurea Microencapsulated Mono- and Bimetallic Nanocatalysts: Activity, Selectivity, and Kinetic Modeling

Hydrogenation of Styrene Oxide to 2-Phenyl Ethanol over Polyurea Microencapsulated Mono- and Bimetallic Nanocatalysts: Activity, Selectivity, and Kinetic Modeling

Recent Advances of Catalysis in the Hydrogenation and Dehydrogenation of N-Heterocycles for Hydrogen Storage

Review—Supercritical Deposition: A Powerful Technique for Synthesis of Functional Materials for Electrochemical Energy Conversion and Storage

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