Tailoring Galvanic Replacement Reaction for the Preparation of Pt/Ag Bimetallic Hollow Nanostructures with Controlled Number of Voids

Zhang, Weiqing; Yang, Jizheng; Lu, Xianmao

doi:10.1021/nn302590k

Cited by 245 publications

(211 citation statements)

References 46 publications

(90 reference statements)

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“…The GRR is one of the most efficient strategies to combine different metals in a single nanostructure. This strategy provides a remarkably simple route to produce complex metallic nanostructures with controllable hollow interiors by means of the reaction of solid metal nanostructures, used as sacrificial templates (usually Ag [19,[64][65][66][67][68], but also Cu [69][70][71], Co [70,[72][73][74][75][76][77], Pd [78,79], Mg [80] or alloys Pd-Cu [81]) and a precursor containing a relatively more noble metal ion (Au, Pd, or Pt), in a process by which the composition of the template is modified while retaining its initial morphology. Figure 2A [82].…”

Section: Synthesis Of Hollow Nanostructuresmentioning

confidence: 99%

“…Thus, in addition to AuAg hollow nanostructures, PtAg, PdAg [90], PdPt alloy nanocages [91,92], and trimetallic PdAuAg hollow nanostructures with control of the spatial distributions of different metals [93] can also be prepared via the GRR by simply altering the order of addition for the salt precursors, which resulted in an improved tailoring of their optical and catalytic properties. Other hollow compositions such as PtAg bimetallic nanostructures [65] and PtAg@Pt core-shell single-crystal hollow NCs [67] have also been obtained via GRR between Ag templates and a Pt salt.…”

Section: Synthesis Of Hollow Nanostructuresmentioning

confidence: 99%

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Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

et al. 2016

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Metallic nanostructures have received great attention due to their ability to generate surface plasmon resonances, which are collective oscillations of conduction electrons of a material excited by an electromagnetic wave. Plasmonic metal nanostructures are able to localize and manipulate the light at the nanoscale and, therefore, are attractive building blocks for various emerging applications. In particular, hollow nanostructures are promising plasmonic materials as cavities are known to have better plasmonic properties than their solid counterparts thanks to the plasmon hybridization mechanism. The hybridization of the plasmons results in the enhancement of the plasmon fields along with more homogeneous distribution as well as the reduction of localized surface plasmon resonance (LSPR) quenching due to absorption. In this review, we summarize the efforts on the synthesis of hollow metal nanostructures with an emphasis on the galvanic replacement reaction. In the second part of this review, we discuss the advancements on the characterization of plasmonic properties of hollow nanostructures, covering the single nanoparticle experiments, nanoscale characterization via electron energy-loss spectroscopy and modeling and simulation studies. Examples of the applications, i.e. sensing, surface enhanced Raman spectroscopy, photothermal ablation therapy of cancer, drug delivery or catalysis among others, where hollow nanostructures perform better than their solid counterparts, are also evaluated.

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Section: Synthesis Of Hollow Nanostructuresmentioning

confidence: 99%

Section: Synthesis Of Hollow Nanostructuresmentioning

confidence: 99%

Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

et al. 2016

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“…However, because of the contribution of numerous critical factors, it is difficult to develop a precisely designed synthetic method. According to Zhang et al, the interaction between a Cu template and the replacing Pt can be confirmed by the fact that the size and number of hollow voids, which are the most important features of nanostructures formed through galvanic replacement, can be varied depending on pH and the presence of the surface-stabilizing polymer PVP [222]. These adjustments result in the formation of nanoboxes, heterodimers, multimers, and popcorn-shaped hollow voids.…”

Section: Anisotropic Nanostructuresmentioning

confidence: 99%

Recent Advances in Nanoparticle Shape and Composition Regulation Based on Galvanic Replacement for Cancer Treatment

Shin¹,

Kang²,

Jang³

2018

Preprint

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Owing to their unique physicochemical properties, nanoparticles are used in a variety of ways in the field of cancer treatment, including imaging, drug delivery, and photothermal and photodynamic therapies. The fascinating properties of nanoparticles are determined by their size, morphology, and constituent elements, and various synthetic methods and post-synthetic techniques have been applied to control these factors. Herein, we present examples of shape and composition control through galvanic replacement, a technique that exploits redox potential differences between elements to induce spontaneous ion-exchange and highlight its specific contributions to cancer treatment applications. The present article identifies the recent advances in nanoparticle formation techniques and discusses the future outlook of the field.

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“…A series of electrocatalysts possessing Cu or Cu alloy cores and Pt shells have also been prepared in various experiments by using this simplified two-step seed-mediated growth method consisting of the galvanic replacement reaction [114,124,125,137]. Other core-shell-structured electrocatalysts such as Au@Pt and Ag@Pt have also been synthesized by using this principle as well [117,130]. Various examples are presented in Table 2.…”

Section: Principles and Development Of Wet Chemical Depositionmentioning

confidence: 99%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

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Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

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Tailoring Galvanic Replacement Reaction for the Preparation of Pt/Ag Bimetallic Hollow Nanostructures with Controlled Number of Voids

Cited by 245 publications

References 46 publications

Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

Hollow metal nanostructures for enhanced plasmonics: synthesis, local plasmonic properties and applications

Recent Advances in Nanoparticle Shape and Composition Regulation Based on Galvanic Replacement for Cancer Treatment

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

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