Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

Cheng, Yi; Fan, Yiqiu; Pei, Yan; Qiao, Minghua

doi:10.1039/c5cy00630a

Cited by 127 publications

(70 citation statements)

References 175 publications

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“…The typical support materials used in heterogeneous catalysis are generally carbon‐based (carbon black, graphene or carbon nanotubes) or oxide‐based (MgO, ZnO, Al 2 O 3 , Fe 3 O 4 , SiO 2 , TiO 2 , CeO 2 etc.) and mainly used in electrocatalysis, photocatalysis, Fischer Tropsch synthesis as well as selective oxidation or reduction processes . In conventional synthesis approaches, cross‐correlations potentially arise from calcination and surfactant removal due to a simultaneously (but not necessarily equally) occurring alteration of the support‐ and nanoparticle morphology rendering a separate screening e. g. of support properties (e. g. defect density) and determination of its influence on catalyst activity complex and difficult .…”

Section: Nanointegration: Supported Laser‐generated Particlesmentioning

confidence: 99%

“…The integration of NPs onto support materials is a key strategy in order to enhance the catalyst applicability as well as to evolve novel material properties from synergetic effects between support and nanoparticle. [18,86,[229][230][231] The typical support materials used in heterogeneous catalysis are generally carbon-based (carbon black, graphene or carbon nanotubes) or oxide-based (MgO, ZnO, Al 2 O 3 , Fe 3 O 4 , SiO 2 , TiO 2 , CeO 2 etc.) and mainly used in electrocatalysis, [15] photocatalysis, [231] Fischer Tropsch synthesis [230] as well as selective oxidation or reduction processes.…”

Section: Nanointegration: Supported Laser-generated Particlesmentioning

confidence: 99%

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Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

et al. 2019

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Due to material gaps and synthesis‐related cross‐correlations in heterogeneous catalysis, chemists and physicists are constantly motivated to develop novel catalyst preparation methods for independent control of morphology, size, and composition. Within this article, advances, opportunities, and the current limits of laser‐based catalyst preparation technique, as well as synergies with conventional methods will be reviewed in terms of purity, particle size, morphology, composition, and nanoparticle‐support interaction. It will be shown, that the surfactant‐free particles represent ideal model materials to validate kinetic models and conduct parametric activity studies by independent adjustment of functional properties like nanoparticle size, composition, and load. Consequently, the importance of transient plasma dynamics tailoring nanoparticle formation will be pointed out, comparing experimental studies with own calculations and novel simulations taken from literature. Finally, perspectives of surfactant‐free colloidal nanoparticles for unrevealing active sites in heterogeneous catalysts are presented.

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Section: Nanointegration: Supported Laser‐generated Particlesmentioning

confidence: 99%

Section: Nanointegration: Supported Laser-generated Particlesmentioning

confidence: 99%

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

et al. 2019

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“…The following important concepts and applications of 2D oxides are emerging: i) H 2 production and biorefinery, ii) photocatalysts for water splitting and CO 2 reduction, iii) energy storage and conversion, iv) multifunctional catalysts for cascade reactions, v) environmental applications, vi) 2D zeolites for fine chemistry, vii) encapsulation with 2D oxides, and viii) development of new classes of material.…”

Section: Introductionmentioning

confidence: 99%

2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

et al. 2018

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2D oxide nanomaterials constitute a broad range of materials, with a wide array of current and potential applications, particularly in the fields of energy storage and catalysis for sustainable energy production. Despite the many similarities in structure, composition, and synthetic methods and uses, the current literature on layered oxides is diverse and disconnected. A number of reviews can be found in the literature, but they are mostly focused on one of the particular subclasses of 2D oxides. This review attempts to bridge the knowledge gap between individual layered oxide types by summarizing recent developments in all important 2D oxide systems including supported ultrathin oxide films, layered clays and double hydroxides, layered perovskites, and novel 2D-zeolite-based materials. Particular attention is paid to the underlying similarities and differences between the various materials, and the subsequent challenges faced by each research community. The potential of layered oxides toward future applications is critically evaluated, especially in the areas of electrocatalysis and photocatalysis, biomass conversion, and fine chemical synthesis. Attention is also paid to corresponding novel 3D materials that can be obtained via sophisticated engineering of 2D oxides.

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“…The typically accepted methods for coupling reactions are performed under homogeneous conditions that employ organic ligand-stabilized homogeneous complexes. Homogeneous reaction systems does contain some drawbacks, including not only the poor recovery and reusability of homogeneous catalysts but also the toxicity and water or air sensitivity [38]. Ligand-free and recyclable heterogeneous Pd catalysts represent promising options to address these issues [174,175].…”

Section: C-c Coupling Reactionsmentioning

confidence: 99%

“…In ad- [27][28][29][30][31][32][33][34][35][36]. Compared to other carbon allotropes, graphene offers the greatest intrinsic carrier mobility at room temperature; its perfect atom lattice promises mechanical strength, chemical and thermal stability, high adsorption capacity, excellent electrical conductivity, and easiness of modification, making it an ideal choice for catalyst support [37][38][39][40][41].It is worth noting that, due to the nature of two dimensional (2D) material, graphene tends to form irreversible agglomerates via van der Waals interactions [42][43][44]. The key challenges involve preventing the stacking of graphene sheets and achieving complete dispersion of individual single-layer graphene in various solvents to support active phase.…”

mentioning

confidence: 99%

Graphitized nanocarbon-supported metal catalysts: synthesis, properties, and applications in heterogeneous catalysis

Huang

2017

Sci. China Mater.

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Graphitized nanocarbon materials can be an ideal catalyst support for heterogeneous catalytic systems. Their unique physical and chemical properties, such as large surface area, high adsorption capacity, excellent thermal and mechanical stability, outstanding electronic properties, and tunable porosity, allow the anchoring and dispersion of the active metals. Therefore, currently they are used as the key support material in many catalytic processes. This review summarizes recent relevant applications in supported catalysts that use graphitized nanocarbon as supports for catalytic oxidation, hydrogenation, dehydrogenation, and C-C coupling reactions in liquid-phase and gas-solid phase-reaction systems. The latest developments in specific features derived from the morphology and characteristics of graphitized nanocarbon-supported metal catalysts are highlighted, as well as the differences in the catalytic behavior of graphitized nanocarbon-supported metal catalysts versus other related catalysts. The scientific challenges and opportunities in this field are also discussed. Keywords: nanocarbon materials; graphitized carbon supports; metal catalysts; hetergeneous catalysis INTRODUCTIONCarbon combines its atoms in diverse hybridization states (sp, sp 2 , sp 3 ) to form a variety of polymorphs. These are composed entirely of carbon but have different physical structures and different names, including diamond, graphite, fullerenes, and carbines, among others [1][2][3][4][5]. Because these various and versatile allotropes produce materials with a large range of properties, carbon materials can be used in a number of technological processes, including high-tech catalytic ones [6][7][8][9][10].In heterogeneous catalysis, carbon material plays wellestablished and important roles in a wide range of applications, both as catalyst in its own right and as a unique support material [11][12][13][14][15]. The chemical stability of carbon supports in some specifically aqueous phase biomass conversion surpasses that of metal oxide materials; in addition, carbon materials present other common and key advantages as support materials for catalysis [1,5]. From the point of physical structure, porous carbon can be prepared in different forms (granules, cloth, fibers, pallets, etc.). Due to its chemical properties, carbon structure is resistant to both acidic and basic media. The structure of carbon is stable at high temperature (even above 1023 K under inert atmosphere). The hydrophilic/ hydrophobic nature of carbon can be easily modified. Active metals on the support can be easily reduced. For the purposes of industrial economy and environment, the active phase can be easily recovered. Conventional carbon supports are lower-cost and more easily available than other conventional supports. Although several kinds of carbon materials have been studied, active carbon (AC) [12,[16][17][18][19] and, to a lesser extend, carbon black [20][21][22][23] have long been the most commonly used carbon supports. AC is an amorphous solid prepa...

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Graphene-supported metal/metal oxide nanohybrids: synthesis and applications in heterogeneous catalysis

Abstract: This minireview outlines recent advances in the design and catalytic applications of graphene-supported metal/metal oxide nanohybrids.

Cited by 127 publications

References 175 publications

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

Perspective of Surfactant‐Free Colloidal Nanoparticles in Heterogeneous Catalysis

2D Oxide Nanomaterials to Address the Energy Transition and Catalysis

Graphitized nanocarbon-supported metal catalysts: synthesis, properties, and applications in heterogeneous catalysis

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