Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness

2019 ◽  
Vol 9 (17) ◽  
pp. 4668-4677 ◽  
Author(s):  
Min Zhang ◽  
Shu Miao ◽  
Bo-Qing Xu
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Shell Thickness ◽  
Reduction Reaction ◽  
Core Shell ◽  
Core Size ◽  
The Core ◽  
Electrocatalytic Performance ◽  
Electrochemical Oxygen

Au-d@NimPtm nanostructures are studied to address the effects of the Au-core size (d) and NiPt-shell thickness (m) on the electrocatalytic performance of Pt for the ORR.

Synthesis of monodisperse high entropy alloy nanocatalysts from core@shell nanoparticles

2021 ◽  
Author(s):  
Yifan Chen ◽  
Xun Zhan ◽  
Sandra L. A. Bueno ◽  
Ibrahim H. Shafei ◽  
Hannah M. Ashberry ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
High Entropy Alloy ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
High Entropy ◽  
Electrocatalytic Performance ◽  
Core Shell Nanoparticles

Annealing core@shell nanoparticles (NPs) yields high-entropy alloy NPs. Owing to their dispersed Pt/Pd content and low elemental diffusivity, they exhibit enhanced electrocatalytic performance and durability for the oxygen reduction reaction.

scholarly journals A Platinum Monolayer Core-Shell Catalyst with a Ternary Alloy Nanoparticle Core and Enhanced Stability for the Oxygen Reduction Reaction

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Haoxiong Nan ◽  
Xinlong Tian ◽  
Lijun Yang ◽  
Ting Shu ◽  
Huiyu Song ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Ternary Alloy ◽  
Photoelectron Spectroscopy ◽  
Reduction Reaction ◽  
Core Shell ◽  
X Ray ◽  
The Core ◽  
Platinum Monolayer ◽  
Nanoparticle Core

We synthesize a platinum monolayer core-shell catalyst with a ternary alloy nanoparticle core of Pd, Ir, and Ni. A Pt monolayer is deposited on carbon-supported PdIrNi nanoparticles using an underpotential deposition method, in which a copper monolayer is applied to the ternary nanoparticles; this is followed by the galvanic displacement of Cu with Pt to generate a Pt monolayer on the surface of the core. The core-shell Pd1Ir1Ni2@Pt/C catalyst exhibits excellent oxygen reduction reaction activity, yielding a mass activity significantly higher than that of Pt monolayer catalysts containing PdIr or PdNi nanoparticles as cores and four times higher than that of a commercial Pt/C electrocatalyst. In 0.1 M HClO4, the half-wave potential reaches 0.91 V, about 30 mV higher than that of Pt/C. We verify the structure and composition of the carbon-supported PdIrNi nanoparticles using X-ray powder diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission electron microscopy, and energy dispersive X-ray spectrometry, and we perform a stability test that confirms the excellent stability of our core-shell catalyst. We suggest that the porous structure resulting from the dissolution of Ni in the alloy nanoparticles may be the main reason for the catalyst’s enhanced performance.

Enhanced Electrocatalytic Performance of Processed, Ultrathin, Supported Pd–Pt Core–Shell Nanowire Catalysts for the Oxygen Reduction Reaction

2011 ◽  
Vol 133 (25) ◽  
pp. 9783-9795 ◽  
Author(s):  
Christopher Koenigsmann ◽  
Alexander C. Santulli ◽  
Kuanping Gong ◽  
Miomir B. Vukmirovic ◽  
Wei-ping Zhou ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Reduction Reaction ◽  
Core Shell ◽  
Electrocatalytic Performance ◽  
Supported Pd

Dealloyed PdAg core Pt monolayer shell electrocatalyst for oxygen reduction reaction

RSC Advances ◽  
2016 ◽  
Vol 6 (21) ◽  
pp. 16904-16910 ◽  
Author(s):  
Hai-Fang Yang ◽  
Yuan-Yuan Feng ◽  
Li-Xia Du ◽  
Zeng-Hua Liu ◽  
De-Sheng Kong
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Catalytic Properties ◽  
Reduction Reaction ◽  
Core Shell ◽  
The Core

A core–shell nanostructure with dealloyed PdAg nanoparticles as the core and a Pt monolayer as the shell shows much higher catalytic properties for oxygen reduction reaction as compared with its counterpart with alloyed PdAg as the core.

Shell-thickness-dependent Pd@PtNi core-shell nanosheets for efficient oxygen reduction reaction

2021 ◽  
pp. 131565
Author(s):  
Qiuyan Chen ◽  
Zhenyu Chen ◽  
Asad Ali ◽  
Yeqiang Luo ◽  
Huiyan Feng ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Shell Thickness ◽  
Reduction Reaction ◽  
Core Shell
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