Facile Synthesis of Nanoporous Pt–Ru Alloy Spheres with Various Compositions toward Highly Active Electrocatalysts

Ataee‐Esfahani, Hamed; Nemoto, Y.; Imura, Masataka; Yamauchi, Yusuke

doi:10.1002/asia.201200053

Cited by 44 publications

(39 citation statements)

References 46 publications

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“…The difference of methanol oxidation peak potentials was highly correlated with the oxygenated functional groups on the surfaces of the graphene sheets or of the carbon black. Overall, the I f / I b ratios implied the CO-poisoning attribution of the electrocatalysts [19, 27]. …”

Section: Resultsmentioning

confidence: 99%

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Nanocomposite for methanol oxidation: synthesis and characterization of cubic Pt nanoparticles on graphene sheets

Yung

Lee

Liu

2013

Science and Technology of Advanced Materials

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We present our recent results on Pt nanoparticles on graphene sheets (Pt-NPs/G), a nanocomposite prepared with microwave assistance in ionic liquid 2-hydroxyethanaminiumformate. Preparation of Pt-NPs/G was achieved without the addition of extra reductant such as hydrazine or ethylene glycol. The Pt nanoparticles on graphene have a cubic-like shape (about 60 wt% Pt loading, Pt-NPs/G) and the particle size is 6 ± 3 nm from transmission electron microscopy results. Electrochemical cyclic voltammetry studies in 0.5 M aqueous H2SO4 were performed using Pt-NPs/G and separately, for comparison, using a commercially available electrocatalyst (60 wt% Pt loading, Pt/C). The electrochemical surface ratio of Pt-NPs/G to Pt/C is 0.745. The results of a methanol oxidation reaction (MOR) in 0.5 M aqueous H2SO4 + 1.0 M methanol for the two samples are presented. The MOR results show that the ratios of the current density of oxidation (If) to the current density of reduction (Ib) are 3.49 (Pt-NPs/G) and 1.37 (Pt/C), respectively, with a preference by 2.55 times favoring Pt-NPs/G. That is, the tolerance CO poisoning of Pt-NPs/G is better than that of commercial Pt/C.

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Section: Resultsmentioning

confidence: 99%

“…The well-dispersed nanoparticles, Pt or Pt–M alloys (M for Ru, etc), on electrodes are the desirable conditions in practice [19–22]. A lower Pt loading with a higher electrocatalytical property is the optimum goal.…”

Section: Introductionmentioning

confidence: 99%

Nanocomposite for methanol oxidation: synthesis and characterization of cubic Pt nanoparticles on graphene sheets

Yung

Lee

Liu

2013

Science and Technology of Advanced Materials

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“…318,319 AuPt nanospheres with a Au metal core coated with a dendritic Pt shell were synthesized by adding ascorbic acid solution as a mild reducing agent to the precursor solution containing Au and Pt salts and Pluronic F127. 320,321 Because of the different reduction potentials of Au and Pt species, the reduction of Au ions preferentially occurs over a short time to form Au seeds.…”

Section: Expansion Of Conceptmentioning

confidence: 99%

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

et al. 2013

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Materials fabrication with nanoscale structural precision based on bottom-up-type self-assembly has become more important in various current disciplines in chemistry including materials chemistry, organic chemistry, physical chemistry, analytical chemistry, biochemistry, colloid and surface chemistry, and supramolecular chemistry. Although the design of new materials based on nanoscale self-assembly is anticipated as a key concept, preparing complete three-dimensional structures at nanoscale precision remains a difficult target using current technologies. Rather, dimension-reduced approaches such as layering of two-dimensional nanostructures into precisely controlled lamellar nanomaterials are currently achievable. In particular, layer-by-layer (LbL) assembly is known as a highly versatile method for fabrication of controlled layered structures from various kinds of component materials using very simple, inexpensive, and rapid procedures. Therefore, fabrication of multilayer films through the LbL deposition process has attracted growing interest from various research communities. The high versatility and flexibility of LbL assembly is continuously creating new concepts, new materials, new procedures, and new applications. In this highlight review, we focus on nanoarchitectonics by LbL assembly. After an initial introduction on the invention and a brief history of the LbL assembly technique, innovations and the evolution of the technique are described based mainly on recent examples, which are categorized into two sections: (i) developments in methodology (technical, material, and phenomenological aspects with expansion of concept) and (ii) progress in applications (physical, chemical/biochemical, and biomedical applications).

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“…Pt-based bimetallic NPs are a promising for use as catalysts in methanol and hydrogen oxidation, because of ideal electrochemical properties such as chemical inertness and high catalytic activity [11][12][13]. The high cost of rare Pt, however, is a significant hurdle, and many efforts have focused on the development of novel Pt-based nanomaterials with a core-shell and/or nanoporous structures in order to achieve a maximized surface area using a minimum amount of Pt [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

Rashid

Jun

Jung

et al. 2015

Sensors and Actuators B: Chemical

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Facile Synthesis of Nanoporous Pt–Ru Alloy Spheres with Various Compositions toward Highly Active Electrocatalysts

Cited by 44 publications

References 46 publications

Nanocomposite for methanol oxidation: synthesis and characterization of cubic Pt nanoparticles on graphene sheets

Nanocomposite for methanol oxidation: synthesis and characterization of cubic Pt nanoparticles on graphene sheets

Layer-by-layer Nanoarchitectonics: Invention, Innovation, and Evolution

Bimetallic core–shell Ag@Pt nanoparticle-decorated MWNT electrodes for amperometric H2 sensors and direct methanol fuel cells

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