Composition‐Tunable Pt–Co Alloy Nanoparticle Networks: Facile Room‐Temperature Synthesis and Supportless Electrocatalytic Applications

Xu, You; Yuan, Yongqiang; Ma, Aiyuan; Wu, Xuan; Liu, Yang; Zhang, Bin

doi:10.1002/cphc.201100989

Cited by 43 publications

(31 citation statements)

References 55 publications

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“…The formation of such one‐dimensional motifs is based on the intrinsic magnetic dipole–dipole interactions of the magnetic nanoparticles. When the magnetic dipole interactions between nanoparticles are strong enough in the reaction system, one‐dimensional chain structures are formed 31–33. Similar phenomena have also been observed in a previous report on the formation of Co‐Pt hollow nanochains with tunable lengths from 300 nm to 2 μm with the use of external magnetic fields 34…”

supporting

confidence: 72%

Displacement Plating of a Mesoporous Pt Skin onto Co Nanochains in a Low‐Concentration Surfactant Solution

Li¹,

Imura²,

Yamauchi³

2014

Chemistry A European J

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Mesoporous Pt skins on Co nanochains are successfully synthesized by a displacement reaction between Pt species and a Co support with the assistance of surfactant micelles. The assembly of surfactant micelles on Co nanochains plays a key role in the formation of mesoporous Pt layers. The evolution of the mesoporous Pt layers is carefully studied at different time intervals. As the reaction time increases, the mesoporous Pt layers become thicker, and well-defined mesoporous structures gradually develop. The obtained mesoporous Pt skin exhibits high activity and superior CO tolerance in the electro-oxidation reaction of methanol. The mesoporous Pt skin also shows very high durability, and only a 20.2 % loss of the Pt electrochemical surface area is found even after a harsh durability test.

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supporting

confidence: 72%

Displacement Plating of a Mesoporous Pt Skin onto Co Nanochains in a Low‐Concentration Surfactant Solution

Li¹,

Imura²,

Yamauchi³

2014

Chemistry A European J

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“…For examples, CoPt networks show high specific activity in both methanol oxidation reaction (MOR) and formic acid oxidation (FAO) [13]. Dealloyed CoPt hollow nanowires with ultrathin wall exhibit well-preserved activities after 10,000 cycles [14].…”

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confidence: 99%

Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation

et al. 2016

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Nanomagnetic CoPt truncated octahedral nanoparticles (TONPs) were successfully synthesised through a facile one-pot strategy. These single crystal CoPt TONPs with an average size of about 8 nm exhibit excellent electrocatalytic performance of both activity and stability for methanol oxidation reaction (MOR). The mass and specific activities of CoPt TONPs is 8 and 6 times higher than that of standard commercial Pt/C, respectively. After accelerated durability test (ADT), the loss of electrochemical surface area (ECSA) for CoPt TONPs is only 18.5%, which is significantly less than that of commercial Pt/C (68.2%), indicating that CoPt TONPs possess much better stability than commercial Pt/C in the prolonged operation. The Curie temperature of CoPt TONPs down to 8 nm is as high as 350 K with weak ferromagntism at room temperature (RT), which is greatly valuable for recycling in the eletrocatalytic applications.

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“…[1][2][3][4][5][6] Recently, signicant progress has been made in assembling NMNCs into sophisticated superarchitectures, for example, threedimensional (3D) superspheres. 9,13,14 In previous studies, sulfur-containing chemicals, e.g. 9,13,14 In previous studies, sulfur-containing chemicals, e.g.…”

mentioning

confidence: 96%

“…9,13,14 In previous studies, sulfur-containing chemicals, e.g. The interactions between the peptides might drive the self-assembly of platinum nanocrystals and determine their surface properties.…”

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confidence: 99%

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Short peptide mediated self-assembly of platinum nanocrystals with selective spreading property

et al. 2016

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Spherical assemblies with core/shell configurations are prepared through C-terminal amidated short peptide mediated self-association of platinum nanocrystals. The interactions between the peptides might drive the self-assembly of platinum nanocrystals and determine their surface properties. Thus, the nanosize assemblies collapse and spread on a hydrophilic surface, whereas maintaining their spherical shapes on a hydrophobic surface.Noble metal nanocrystals (NMNCs) possess fascinating properties, including catalytic, optical and electrical performance, and have been considered as superior building blocks for multifunctional materials. 1-4 It has been well known that many properties of the materials are dependent not only on the size, shape and composition of the building blocks, but also on their spatial conformations in the superarchitecture. 1-6 Recently, signicant progress has been made in assembling NMNCs into sophisticated superarchitectures, for example, threedimensional (3D) superspheres. 7-10 These superarchitectures have shown potential for fascinating applications in drug delivery, 11 bioimaging, 12 and catalysis. 9,13,14 In previous studies, sulfur-containing chemicals, e.g. thiols and thioethers, were mainly used as the cross-linking agents, and the assembly methodology involved organic solvents and complicated approaches, such as place-exchanging and exchanging-crosslinking. [15][16][17][18] In contrast, the self-assembly of NMNCs into well-dened functional superstructures through an easy, efficient and environment-friendly approach is still less reported, and the quest is continuously ongoing. 19 Herein, we present a type of 3D core/shell nanoassembly, easily formed by platinum nanocrystals (Pt NCs) using a short peptide as the cross-linking agent in an aqueous solution and demonstrate their selective wetting and spreading properties on a hydrophilic substrate, as shown in Scheme 1.Previously, a hepta-peptide with the sequence of NH 2 -TLHVSSY-COOH, named P7A, was found to stabilize ultra-small Pt NCs with a diameter of 1.7-3.5 nm in an aqueous solution by specically binding to their surfaces. 20-26 Our recent study revealed that the C-terminal carboxyl group of P7A is crucially important for stable dispersion of the Pt NCs in an aqueous solution, providing pH-dependent electrostatic repulsive intereactions. 27 Therefore, it will be interesting to screen such electrostatic repulsions through amidation of the carboxyl group. With an FMOC solid phase peptide synthesis (SPPS) strategy, we Scheme 1 Schematic of P7A-NH 2 mediated Pt NCs assembly into core/shell nanoassemblies with the ability of selectively wetting and spreading on the hydrophilic surface.

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Composition‐Tunable Pt–Co Alloy Nanoparticle Networks: Facile Room‐Temperature Synthesis and Supportless Electrocatalytic Applications

Cited by 43 publications

References 55 publications

Displacement Plating of a Mesoporous Pt Skin onto Co Nanochains in a Low‐Concentration Surfactant Solution

Displacement Plating of a Mesoporous Pt Skin onto Co Nanochains in a Low‐Concentration Surfactant Solution

Nanomagnetic CoPt truncated octahedrons: facile synthesis, superior electrocatalytic activity and stability for methanol oxidation

Short peptide mediated self-assembly of platinum nanocrystals with selective spreading property

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