Sonochemical synthesis of three-dimensional aggregates of pd nanoparticles with high electrocatalytic activity towards ethanol oxidation

2014 ◽  
Vol 30 (2) ◽  
pp. 320-325 ◽  
Author(s):  
Yanli Wang ◽  
Dexin Tan
Keyword(s):  
Electrocatalytic Activity ◽  
Ethanol Oxidation ◽  
Three Dimensional ◽  
Pd Nanoparticles ◽  
Sonochemical Synthesis

scholarly journals Effect of Pd on the Electrocatalytic Activity of Pt towards Oxidation of Ethanol in Alkaline Solutions

2021 ◽  
Vol 11 (3) ◽  
pp. 1315
Author(s):  
Salma Jadali ◽  
Mohammad Ali Kamyabi ◽  
José Solla-Gullón ◽  
Enrique Herrero
Keyword(s):  
Photoelectron Spectroscopy ◽  
Electrocatalytic Activity ◽  
Oxidation Reaction ◽  
Ethanol Oxidation ◽  
Aldol Condensation ◽  
Pd Nanoparticles ◽  
Alkaline Media ◽  
Alkaline Solutions ◽  
Ethanol Oxidation Reaction ◽  
X Ray

The understanding of electrocatalytic activity and poisoning resistance properties of Pt and Pd nanoparticles, recognized as the best electrocatalysts for the ethanol oxidation reaction, is an essential step for the commercialization of direct ethanol fuel cells (DEFCs). In this paper, mono and bimetallic Pt and Pd nanoparticles with different atomic ratios have been synthesized to study their electrocatalytic properties for an ethanol oxidation reaction in alkaline solutions. The different nanoparticles were physiochemically characterized by transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The electrochemical characterization was performed by cyclic voltammetry and chronoamperometry measurements. The electrochemical measurements indicate that Pt nanoparticles have much higher electrocatalytic activity for ethanol oxidation than Pd nanoparticles. The studies with bimetallic PtPd nanoparticles showed a significant impact of their composition on the ethanol oxidation. Thus, the highest electrocatalytic activity and poisoning resistance properties were obtained for Pt3Pd2 nanoparticles. Moreover, this study demonstrates that the poisoning of the catalyst surface through ethanol oxidation is related to the prevalence of the acetaldehyde–acetate route and the polymerization of acetaldehyde through aldol condensation in the alkaline media.

Three dimensional palladium nanoflowers with enhanced electrocatalytic activity towards the anodic oxidation of formic acid

2015 ◽  
Vol 3 (3) ◽  
pp. 973-977 ◽  
Author(s):  
Bingqing Zhang ◽  
Hongliang Peng ◽  
Lijun Yang ◽  
Hualing Li ◽  
Haoxiong Nan ◽  
...  
Keyword(s):  
Formic Acid ◽  
Anodic Oxidation ◽  
Electrocatalytic Activity ◽  
Three Dimensional ◽  
Pd Nanoparticles ◽  
Enhanced Activity ◽  
Electro Oxidation

Pd nanoflowers (Pd-NF) composed of ultrathin Pd nanosheets show significantly enhanced activity towards the electro-oxidation of formic acid compared to ordinary Pd nanoparticles.

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