scholarly journals PREPARING OF METALLIC ELECTROCATALYTIC NANOSTRUCTURED SURFACE BY GALVANIC REPLACEMENT METHOD (REVIEW)

2019 ◽  
Vol 2 (2) ◽  
pp. 25-34
Author(s):  
H. І. Zozulia ◽  
◽  
O. I. Kuntyi ◽  
Keyword(s):  
Galvanic Replacement ◽  
Nanostructured Surface ◽  
Replacement Method

Facile galvanic replacement method for porous Pd@Pt nanoparticles as an efficient HER electrocatalyst

2020 ◽  
Vol 45 (19) ◽  
pp. 11127-11137 ◽  
Author(s):  
Balasingh Thangadurai Jebaslinhepzybai ◽  
Natarajan Prabu ◽  
Manickam Sasidharan
Keyword(s):  
Pt Nanoparticles ◽  
Galvanic Replacement ◽  
Replacement Method

Synergistic catalysis of Au–Cu/TiO2-NB nanopaper in aerobic oxidation of benzyl alcohol

2014 ◽  
Vol 2 (38) ◽  
pp. 16292-16298 ◽  
Author(s):  
Qinqin Jia ◽  
Dongfang Zhao ◽  
Bin Tang ◽  
Na Zhao ◽  
Haidong Li ◽  
...  
Keyword(s):  
Benzyl Alcohol ◽  
Aerobic Oxidation ◽  
Alcohol Oxidation ◽  
Galvanic Replacement ◽  
One Pot ◽  
Benzyl Alcohol Oxidation ◽  
Synergistic Catalysis ◽  
Replacement Method ◽  
Oxidation Of Benzyl Alcohol

The synergistic catalysis of Au–Cu/TiO2-NB nanostructure synthesized by one-pot photodeposition-galvanic replacement method in benzyl alcohol oxidation.

Synthesis of Al/Cu core–shell particles through optimization of galvanic replacement method in alkaline solution

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Rashid Ali ◽  
Fahad Ali ◽  
Aqib Zahoor ◽  
Rub Nawaz Shahid ◽  
Naeem ul HaqTariq ◽  
...  
Keyword(s):  
Alkaline Solution ◽  
Copper Deposition ◽  
Molar Ratio ◽  
Galvanic Replacement ◽  
Core Shell ◽  
Affecting Factors ◽  
X Ray ◽  
Replacement Method ◽  
Al Powder ◽  
Shell Particles

Abstract In this work, Al/Cu core–shell particles were successfully synthesized through an optimized galvanic replacement method. For this purpose, a uniform and dense copper layer was deposited on aluminum particles in an alkaline solution. The effects of four deposition factors, i. e. (i) molar ratio EDTA-2Na/CuSO4 · 5H2O, (ii) molar ratio CuCl2/Al powder, (iii) pH and (iv) temperature were systematically studied and optimized using the Taguchi orthogonal (L9) method. It was observed that molar ratio EDTA-2Na/CuSO4 · 5H2O and temperature are the most affecting factors in the deposition process. By increasing their levels, copper deposition increases within a specified time. The X-ray diffraction and scanning electron microscopy/ energy-dispersive X-ray spectroscopy results revealed the formation of homogeneous nanostructured Cu shells around Al particles. The results revealed that to achieve maximum copper deposition on Al powder; molar ratio EDTA-2Na. 2H2O/CuSO4. 5H2O, molar ratio CuCl2/Al powder, pH and temperature of the deposition bath should be 2.0, 0.05, 8.8 and 55 °C, respectively.

scholarly journals Study of the Reaction Rate of Gold Nanotube Synthesis from Sacrificial Silver Nanorods through the Galvanic Replacement Method

2010 ◽  
Vol 2010 ◽  
pp. 1-7 ◽  
Author(s):  
Sunil Kwon ◽  
Hyunbae Dong ◽  
Sang-Yup Lee
Keyword(s):  
Early Stage ◽  
Silver Ions ◽  
Reaction Rates ◽  
Ion Concentration ◽  
Galvanic Replacement ◽  
Galvanic Replacement Reaction ◽  
Replacement Reaction ◽  
Replacement Method ◽  
Vis Spectroscopy ◽  
Chlorine Ions

An investigation was carried out about the gold nanotube synthesis via a galvanic replacement reaction. The progress of the gold nanotube synthesis was investigated using electron microscopy and UV-Vis spectroscopy. In addition, the reaction rates of gold nanotube formation in the early stage of the reaction were studied. The chlorine ion concentration linearly increased with the gold precursor concentration but deviated from the stoichiometric amounts. This deviation was probably due to AgCl precipitates formed by the reaction of chlorine ions with dissolved silver ions. The replacement reaction was promoted with increased temperature and was nonlinearly proportional to the gold ion concentration. The outcomes of this research will enhance the current understanding of the galvanic replacement reaction.

Self-supported porous 2D AuCu triangular nanoprisms as model electrocatalysts for ethylene glycol and glycerol oxidation

2017 ◽  
Vol 5 (30) ◽  
pp. 15932-15939 ◽  
Author(s):  
Hui Xu ◽  
Bo Yan ◽  
Jin Wang ◽  
Ke Zhang ◽  
Shumin Li ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Galvanic Replacement ◽  
Glycerol Oxidation ◽  
Replacement Method ◽  
Seed Mediated

A novel class of self-supported porous 2D AuCu triangular nanoprism electrocatalysts have been successfully synthesizedviaa facile combined seed mediated and galvanic replacement method.

scholarly journals Oxygen Evolution Reaction at IrO2/Ir(Ni) Film Electrodes Prepared by Galvanic Replacement and Anodization: Effect of Precursor Ni Film Thickness

Molecules ◽  
2019 ◽  
Vol 24 (11) ◽  
pp. 2095 ◽  
Author(s):  
Aikaterini Touni ◽  
Athanasios Papaderakis ◽  
Dimitrios Karfaridis ◽  
Georgios Vourlias ◽  
Sotiris Sotiropoulos
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Electrocatalytic Activity ◽  
Electrochemical Anodization ◽  
Galvanic Replacement ◽  
Potential Range ◽  
Cyclic Voltammograms ◽  
Replacement Method ◽  
Surface Oxide Formation ◽  
Constant Potential

IrO2/Ir(Ni) film electrodes of variable Ni content have been prepared via a galvanic replacement method, whereby surface layers of pre-deposited Ni are replaced by Ir, followed by electrochemical anodization. Electrodeposition of Ni on a glassy carbon electrode support has been carried out at constant potential and the charge of electrodeposited Ni controlled so as to investigate the effect of precursor Ni layer thickness on the electrocatalytic activity of the corresponding IrO2/Ir(Ni)/GC electrodes for the oxygen evolution reaction (OER). After their preparation, these electrodes were characterized by microscopic (SEM) and spectroscopic (EDS, XPS) techniques, revealing the formation of Ir deposits on the Ni support and a thin IrO2 layer on their surfaces. To determine the electroactive surface area of the IrO2 coatings, cyclic voltammograms were recorded in the potential range between hydrogen and oxygen evolution and the charge under the anodic part of the curves, corresponding to Ir surface oxide formation, served as an indicator of the quantity of active IrO2 in the film. The electrocatalytic activity of the coatings for OER was investigated by current–potential curves under steady state conditions, revealing that the catalysts prepared from thinner Ni films exhibited enhanced electrocatalytic performance.

scholarly journals Pt(Cu) catalyst on TiO2 powder support prepared by photodeposition-galvanic replacement method

2018 ◽  
Vol 823 ◽  
pp. 624-632 ◽  
Author(s):  
N. Dimitrova ◽  
J. Georgieva ◽  
S. Sotiropoulos ◽  
T.Z. Boiadjieva-Scherzer ◽  
E. Valova ◽  
...  
Keyword(s):  
Galvanic Replacement ◽  
Tio2 Powder ◽  
Replacement Method ◽  
Cu Catalyst

scholarly journals Synthesis of carbon-supported Pd–Co bimetallic catalysts templated by Co nanoparticles using the galvanic replacement method for selective hydrogenation

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22294-22300 ◽  
Author(s):  
Takeharu Yoshii ◽  
Kazuki Nakatsuka ◽  
Yasutaka Kuwahara ◽  
Kohsuke Mori ◽  
Hiromi Yamashita Hiromi Yamashita
Keyword(s):  
Selective Hydrogenation ◽  
Bimetallic Catalysts ◽  
Galvanic Replacement ◽  
Co Catalysts ◽  
Replacement Method ◽  
Co Nanoparticles ◽  
Supported Pd

Carbon-supported Pd–Co catalysts prepared by galvanic replacement were proven to be active for the selective hydrogenation of phenylacetylene.

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