Atomic-scale insights into structural and thermodynamic stability of Pd–Ni bimetallic nanoparticles

2016 ◽  
Vol 18 (14) ◽  
pp. 9847-9854 ◽  
Author(s):  
Rao Huang ◽  
Yu-Hua Wen ◽  
Zi-Zhong Zhu ◽  
Shi-Gang Sun
Keyword(s):  
Thermodynamic Stability ◽  
Bimetallic Nanoparticles ◽  
Atomic Scale ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Atomic-scale understanding of structures and thermodynamic stability of core–shell nanoparticles is important for both their synthesis and application.

Two-Stage Melting in Core–Shell Nanoparticles: An Atomic-Scale Perspective

2012 ◽  
Vol 116 (21) ◽  
pp. 11837-11841 ◽  
Author(s):  
Rao Huang ◽  
Yu-Hua Wen ◽  
Zi-Zhong Zhu ◽  
Shi-Gang Sun
Keyword(s):  
Atomic Scale ◽  
Core Shell ◽  
Two Stage ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Energy-dispersive X-ray spectroscopy for an atomic-scale quantitative analysis of Pd–Pt core-shell nanoparticles

Microscopy ◽  
2020 ◽  
Vol 69 (1) ◽  
pp. 26-30
Author(s):  
Shin Inamoto ◽  
Yuji Otsuka
Keyword(s):  
Quantitative Analysis ◽  
Shell Thickness ◽  
Dark Field ◽  
Atomic Scale ◽  
Energy Dispersive ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
X Ray ◽  
Scanning Transmission ◽  
Core Shell Nanoparticles

Abstract The properties of core-shell nanoparticles, which are used for many catalytic processes as an alternative to platinum, depend on the size of both the particle and the shell. It is thus necessary to develop a quantitative method to determine the shell thickness. Pd–Pt core-shell particles were analyzed using scanning transmission electron microscopy (STEM) and energy-dispersive X-ray spectroscopy (EDX). Quantitative EDX line profiles acquired from the core-shell particle were compared to four core-shell models. The results indicate that the thickness of the Pt shell corresponds to two atomic layers. Meanwhile, high-angle annular dark-field STEM images from the same particle were analyzed and compared to simulated images. Again, this experiment demonstrates that the shell thickness was of two atomic layers. Our results indicate that, in small particles, it is possible to use EDX for a precise atomic-scale quantitative analysis.

Thermodynamic stability of electrochemically decorated Au–Pd core@shell nanoparticles

2012 ◽  
Vol 76 ◽  
pp. 424-429 ◽  
Author(s):  
O.A. Oviedo ◽  
L. Reinaudi ◽  
M.M. Mariscal ◽  
E.P.M. Leiva
Keyword(s):  
Thermodynamic Stability ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Enhanced visible-light-driven photocatalytic activity of Au@Ag core–shell bimetallic nanoparticles immobilized on electrospun TiO2 nanofibers for degradation of organic compounds

2017 ◽  
Vol 7 (3) ◽  
pp. 570-580 ◽  
Author(s):  
Mrinmoy Misra ◽  
Narendra Singh ◽  
Raju Kumar Gupta
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Organic Compounds ◽  
Shell Thickness ◽  
Bimetallic Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Tio2 Nanofibers ◽  
Visible Light Driven ◽  
Core Shell Nanoparticles

In this work, Au@Ag core–shell nanoparticles (NPs) with variable Ag shell thickness were synthesized and immobilized on TiO2 nanofibers (TNF).

Atomic-Scale Structure and Stress Release Mechanism in Core–Shell Nanoparticles

ACS Nano ◽  
2018 ◽  
Vol 12 (12) ◽  
pp. 12296-12304 ◽  
Author(s):  
Michael Nathanson ◽  
Krishan Kanhaiya ◽  
Alan Pryor ◽  
Jianwei Miao ◽  
Hendrik Heinz
Keyword(s):  
Scale Structure ◽  
Atomic Scale ◽  
Release Mechanism ◽  
Core Shell ◽  
Stress Release ◽  
Shell Nanoparticles ◽  
Atomic Scale Structure ◽  
Core Shell Nanoparticles

Surface Plasmon Resonant Gold-Palladium Bimetallic Nanoparticles for Promoting Catalytic Oxidation

MRS Advances ◽  
2019 ◽  
Vol 4 (33-34) ◽  
pp. 1877-1886 ◽  
Author(s):  
Jonathan Boltersdorf ◽  
Asher C. Leff ◽  
Gregory T. Forcherio ◽  
Joshua P. McClure ◽  
Cynthia A. Lundgren
Keyword(s):  
Surface Plasmon ◽  
Photocatalytic Oxidation ◽  
Bimetallic Nanoparticles ◽  
Bond Cleavage ◽  
Pd Nanoparticles ◽  
Localized Surface Plasmon ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Gaseous Products ◽  
Core Shell Nanoparticles

AbstractColloidal gold-palladium (Au-Pd) bimetallic nanoparticles were used as catalysts to study the ethanol (EtOH) photo-oxidation cycle, with an emphasis towards driving carbon-carbon (C-C) bond cleavage at low temperatures. Au-Pd bimetallic alloy and core-shell nanoparticles were prepared to synergistically couple a plasmonic absorber (Au) with a catalytic metal (Pd) with composite optical and catalytic properties tailored towards promoting photocatalytic oxidation. Catalysts utilizing metals that exhibit localized surface plasmon resonance (SPR) can be harnessed for light-driven enhancement for small molecule oxidation via augmented photocarrier generation/separation and photothermal conversion. The coupling of Au to Pd in an alloy or core-shell nanostructure maintains SPR-induced charge separation, mitigates the poisoning effects on Pd, and allows for improved EtOH oxidation. The Au-Pd nanoparticles were coupled to semiconducting titanium dioxide photocatalysts to probe their effects on plasmonically-assisted photocatalytic oxidation of EtOH. Complete oxidation of EtOH to CO2 under solar simulated-light irradiation was confirmed by monitoring the yield of gaseous products. Bimetallics provide a pathway for driving desired photocatalytic and photoelectrochemical reactions with superior catalytic activity and selectivity.

scholarly journals Synthesis and biological characterization of alloyed silver–platinum nanoparticles: from compact core–shell nanoparticles to hollow nanoalloys

RSC Advances ◽  
2018 ◽  
Vol 8 (67) ◽  
pp. 38582-38590 ◽  
Author(s):  
Viktoria Grasmik ◽  
Marina Breisch ◽  
Kateryna Loza ◽  
Marc Heggen ◽  
Manfred Köller ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Growth Process ◽  
Composition Range ◽  
Bimetallic Nanoparticles ◽  
Core Shell ◽  
Biological Characterization ◽  
Seeded Growth ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Bimetallic nanoparticles consisting of silver and platinum were prepared by a modified seeded-growth process in water in the full composition range in steps of 10 mol%.

scholarly journals In-situ observation of Cu-Pt core-shell nanoparticles in the atomic scale by XAFS

2013 ◽  
Vol 430 ◽  
pp. 012038 ◽  
Author(s):  
Xusheng Zheng ◽  
Shoujie Liu ◽  
Xing Chen ◽  
Jie Cheng ◽  
Qing Ye ◽  
...  
Keyword(s):  
Atomic Scale ◽  
Core Shell ◽  
In Situ Observation ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

Tunable thermodynamic stability of Au–CuPt core–shell trimetallic nanoparticles by controlling the alloy composition: insights from atomistic simulations

2014 ◽  
Vol 16 (41) ◽  
pp. 22754-22761 ◽  
Author(s):  
Rao Huang ◽  
Gui-Fang Shao ◽  
Yu-Hua Wen ◽  
Shi-Gang Sun
Keyword(s):  
Thermal Stability ◽  
Thermodynamic Stability ◽  
Alloy Composition ◽  
Atomistic Simulations ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Metallic Core ◽  
Core Shell Nanoparticles ◽  
Thermal Stability Of

A microscopic understanding of the thermal stability of metallic core–shell nanoparticles is of importance for their synthesis and ultimately application in catalysis.

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