Synthesis of Ultrathin Face‐Centered‐Cubic Au@Pt and Au@Pd Core–Shell Nanoplates from Hexagonal‐Close‐Packed Au Square Sheets

Fan, Zhanxi; Zhu, Yihan; Huang, Xiao; Han, Yu; Wang, Qingxiao; Liu, Qing; Huang, Ying; Gan, Chee Lip; Zhang, Hua

doi:10.1002/ange.201500993

Cited by 29 publications

(18 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[2] Furthermore,careful consideration of the different inherent growth habits of all constituent metals is required for the synthesis of ultrathin multimetallic alloy nanostructures.A ccordingly,t he synthesis of ultrathin alloy nanosheets remains ag reat challenge.I nf act, the preparation of ultrathin multimetallic alloy nanosheets has rarely been reported, [8] although afew examples of bimetallic core-shell nanosheets have been described. [9] To the best of our knowledge,t he synthesis of ultrathin trimetallic alloy nanosheets has not been achieved thus far.…”

Section: Noble-metalnanocrystals(ncs)withcontrolledshapesandmentioning

confidence: 99%

Ultrathin Free‐Standing Ternary‐Alloy Nanosheets

et al. 2016

View full text Add to dashboard Cite

A synthesis strategy for the preparation of ultrathin free-standing ternary-alloy nanosheets is reported. Ultrathin Pd-Pt-Ag nanosheets with a thickness of approximately 3 nm were successfully prepared by co-reduction of the metal precursors in an appropriate molar ratio in the presence of CO. Both the presence of CO and the interplay between the constituent metals provide fine control over the anisotropic two-dimensional growth of the ternary-alloy nanostructure. The prepared Pd-Pt-Ag nanosheets were superior catalysts of ethanol electrooxidation owing to their specific structural and compositional characteristics. This approach will pave the way for the design of multicomponent 2D nanomaterials with unprecedented functions.

show abstract

Section: Noble-metalnanocrystals(ncs)withcontrolledshapesandmentioning

confidence: 99%

Ultrathin Free‐Standing Ternary‐Alloy Nanosheets

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Up to now, a series of 2D transition monometallic and bimetallic materials with non‐close‐packed facets have been synthesized through surface modification and solution‐phase epitaxial growth methods, such as (001) f ‐oriented fcc Au nanoribbons, (100) f ‐oriented fcc Au square sheets, ultrathin bimetallic (101) f ‐oriented fcc Au@Pt and Au@Pd core–shell nanoplates, (100) f ‐oriented fcc Au@Pt, and Au@Pd square nanoplates (Figure 1). [ 7,15,16 ]…”

Section: Overview Of Unconventional Structures Of Elemental 2d Materialsmentioning

confidence: 99%

“…Compared with vapor‐phase epitaxial growth, solution‐phase epitaxial growth has attracted enormous attention for effectively obtaining bimetallic or multimetallic 2D metallic materials with unconventional single‐ or heterophase structures without ultrahigh vacuum and high temperature. [ 7,15,16,19,66 ] A schematic diagram for the formation of bimetallic or multimetallic 2D metallic materials with unconventional structures by solution‐phase epitaxial growth is shown in Figure a.…”

Section: Synthetic Strategies Of Unconventional Structuresmentioning

confidence: 99%

“…Hitherto, many researchers have made tremendous efforts to synthesize elemental 2D materials with unconventional structures and developed a series of strategies, including surface modification, epitaxial growth, electron beam irradiation, crystal inhibition, and high pressure. [ 13–18 ] However, present scientific achievements and systematic understanding of effective synthetic strategies have not been presented yet. It is highly demanded to give a clear guideline of the different strategies for controlling the preparation and reasonable design of unconventional structures of elemental 2D materials.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Elemental 2D Materials: Progress and Perspectives Toward Unconventional Structures

Shen

et al. 2020

Small Structures

View full text Add to dashboard Cite

Elemental 2D materials have attracted a great deal of interest due to their excellent properties for various applications in catalysis, sensing, photonics, intracellular gene regulation, magnetism, superconductivity, and so on. It is broadly accepted that the physicochemical properties are highly associated with their atomic arrangements and coordination. Recent studies have demonstrated that unconventional structures of elemental 2D materials exhibit unexpected physicochemical properties and innovative applications beyond conventional structures. Those unconventional structures bring new life to elemental 2D materials and deserve special attention. However, there are considerable challenges to controllably prepare them due to their metastable characters. Herein, their synthetic strategies are focused on to shed light on the reasonable design of new structures with special atomic arrangements to open up tremendous opportunities for expanding their functionalities and potential applications. In addition, the correlations among the types of unconventional structures, the element types, and corresponding synthetic strategies are uncovered. Finally, based on the achievements in the representative studies, some prospects and potential opportunities for extending the scope of elemental 2D materials with unconventional structures and potentially distinctive applications are provided.

show abstract

“…The creation of such core-shell structures can be extended to 2D systems. Core-shell metal nanoplates/nanosheets are usually prepared via epitaxial growth between metals with similar lattice properties 61,90 . For example, Liu et al 61 prepared Ag@Au core/shell nanoplates and studied their plasmonic properties.…”

Section: Core-shell Heterostructuresmentioning

confidence: 99%

Spatially Controlled Two-dimensional Heterostructures <i>via</i> Solution-phase Growth

Liu¹,

Wang²,

Wang³

et al. 2019

Acta Physico-Chimica Sinica

Self Cite

View full text Add to dashboard Cite

The research in two-dimensional (2D) materials, such as graphene, transition metal dichalcogenides (TMDs) and black phosphorus, has been further flourished with the recent emergence of heterostructures composed of dissimilar 2D materials. The interfacing/coupling between different constituent components in a heterostructure has given rise to interesting phenomena and useful properties. For example, depending on the type of 2D materials, the distance and the kind of bonding between them, as well as the crystalline property of the hetero-interface, the interface may provide charge traps, exciton recombination centers, or bridges for effective charge/energy transfer. It has also been found that the spatial arrangement in addition to the composition of the constituents is an important factor influencing the overall properties of the heterostructures. Although many methods, such as dry transfer and vapor-phased growth are able to yield heterostructures from pristine or highly crystalline 2D crystals with spatial control, such as vertical heterostructures and lateral heterostructures, these methods are generally not scalable, which has restricted the use of the obtained heterostructures mostly to fundamental studies. The solution-phased synthesis methods, such as solvothermal/hydrothermal synthesis, electrochemical deposition and hot-injection method, may be more suitable for mass production of functional heterostructures despite the relatively low product quality. In the past couple of years, a diverse kinds of hetero/hybrid structures of 2D materials have been prepared successfully in wet-chemical processes. However, precise control over the geometric arrangement of the constituent components has been challenging in solution. Currently, four types of heterostructures including 2D crystals grown on a larger 2D template, vertical heterostructures, lateral heterostructures, and core-shell heterostructures have been prepared in solution. For the first type, flexible 2D nanosheets such as graphene and monolayer TMDs are used as synthesis templates to support the nucleation and growth of other 2D crystals. For vertical heterostructures, relatively rigid nanoplates are used to allow continuous deposition of 2D layers of other materials to form sandwich-like structures. The formation of lateral heterostructures requires edge growth on existing 2D materials without basal deposition, and therefore other methods such as cation exchange can be used as alternative routes. The preparation of core-shell 2D heterostructures generally involves both epitaxial edge growth and basal deposition and has been realized in both metallic and semiconductor structures. In this review, these kinds of heterostructures based on 2D materials will be discussed in terms of their synthesis methods, properties and possible applications. In addition, we will discuss the challenges and possible opportunities in this research direction.

show abstract

Synthesis of Ultrathin Face‐Centered‐Cubic Au@Pt and Au@Pd Core–Shell Nanoplates from Hexagonal‐Close‐Packed Au Square Sheets

Cited by 29 publications

References 44 publications

Ultrathin Free‐Standing Ternary‐Alloy Nanosheets

Ultrathin Free‐Standing Ternary‐Alloy Nanosheets

Elemental 2D Materials: Progress and Perspectives Toward Unconventional Structures

Spatially Controlled Two-dimensional Heterostructures <i>via</i> Solution-phase Growth

Contact Info

Product

Resources

About