Effect of bromide ions and polyethylene glycol on morphological control of electrodeposited copper foam

Tan, Kai Liang; Tian, M. B.; Cai, Qiang

doi:10.1016/j.tsf.2010.03.029

Cited by 27 publications

(22 citation statements)

References 21 publications

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“…This significantly decreased the pore size of the material due to less coalescence of hydrogen bubbles evolving from the equiaxed grain microstructure. 64 A similar effect is likely here through changes in the morphology of the wall structure from dendritic to cube like crystals. Given that KAuBr 4 is also not an additional proton source would suggest that the amount of evolved hydrogen will not be significantly influenced.…”

Section: Resultssupporting

confidence: 57%

“…It has been reported for the honeycomb copper system that the formation of closely packed dendrites with interlocking branches encourages more coalescence of hydrogen bubbles that are evolved from the surface resulting in larger pore sizes. 64 When polyethylene glycol was investigated as an additive the wall structure changed from being dendritic in nature to quite regular equiaxed grains. This significantly decreased the pore size of the material due to less coalescence of hydrogen bubbles evolving from the equiaxed grain microstructure.…”

Section: Resultsmentioning

confidence: 99%

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Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

et al. 2012

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The fabrication of nanostructured bimetallic materials through electrochemical routes offers the ability to control the composition and shape of the final material that can then be effectively applied as (electro)-catalysts. In this work a clean and transitory hydrogen bubble templating method is employed to generate porous Cu-Au materials with a highly anisotropic nanostructured interior. Significantly, the co-electrodeposition of copper and gold promotes the formation of a mixed bimetallic oxide surface which does not occur at the individually electrodeposited materials. Interestingly, the surface is dominated by Au(I) oxide species incorporated within a Cu(2)O matrix which is extremely effective for the industrially important (electro)-catalytic reduction of 4-nitrophenol. It is proposed that an aurophilic type of interaction takes place between both oxidized gold and copper species which stabilizes the surface against further oxidation and facilitates the binding of 4-nitrophenol to the surface and increases the rate of reaction. An added benefit is that very low gold loadings are required typically less than 2 wt% for a significant enhancement in performance to be observed. Therefore the ability to create a partially oxidized Cu-Au surface through a facile electrochemical route that uses a clean template consisting of only hydrogen bubbles should be of benefit for many more important reactions.

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Section: Resultssupporting

confidence: 57%

Section: Resultsmentioning

confidence: 99%

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

et al. 2012

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“…28 In addition, Tan et al reported that the effect of bromide ions was similar to chloride ions, while PEG (polyethylene glycol) changed the foam structure oppositely. 29 Kim et al prepared highly porous copper foams with 3-D interconnected pores by using MPSA (3-mercapto-1-propane sulfonic acid). 30 Nam et al studied the influence of (NH 4 ) 2 SO 4 and BTA (benzotriazole) on the formation of pore structure and put forward the specific reactions related to these additives.…”

mentioning

confidence: 99%

3-D Network Pore Structures in Copper Foams by Electrodeposition and Hydrogen Bubble Templating Mechanism

Zhang

Ding

Wang

et al. 2015

J. Electrochem. Soc.

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Copper foams with various pore structures have been prepared using hydrogen bubbles as templates by electrodeposition method. By adjusting deposition time and incorporating different additives, the pore structures of copper deposit layers were effectively tuned as the results of controlled nucleation, growth, coalescence and detachment of hydrogen bubbles on the deposition interfaces. According to the analysis of experimental results, a tentative templating mechanism of hydrogen bubbles has been proposed, in which the well-grown hydrogen bubbles on the deposition interface are believed to contribute mostly to the formation of pore structures in the copper deposit layers, while the bubbles enlarged through interconnection and coalescence make no templating contributions due to their easy detachment from the interface. A larger average size of templating hydrogen bubbles at the upper layer than at the lower layer should arise from the quasi close-packing of growing hydrogen bubbles with their nucleation sites confined to the areas unoccupied by the pre-existing bubbles. In terms of this templating mechanism of hydrogen bubbles, the influences of relative concentrations of Cu 2+ and H + in the electrolyte solutions, deposition current density, chemical species and concentrations of additives on the evolution of pore-structures in the electrodeposited copper foams may be well explained and understood.Porous metal foams are of special physical and/or chemical properties, such as high porosity and internal surface areas, good mechanical strength and electrical conductivity, etc. and thereby have found wide applications as catalyst supports, filters in high temperature liquid, key components for miniaturized heat exchangers, electromagnetic shielding materials, and electrode materials for sensors, batteries, and fuel cells.

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“…This is particularly useful given the critical role the aforementioned properties play in electrocatalysis, photocatalysis, surface enhanced Raman spectroscopy and electroanalytical chemistry. There are several approaches that can be undertaken to achieve a desired nanostructure such as using hard templates like anodised alumina [8,9], chemical templating with surfactants [10,11], inorganic ions [12,13], in situ underpotential deposition of a second metal [14], hydrogen bubbling [4,[15][16][17][18], or in the absence of any template via appropriate choice of metal precursor concentration and the applied potential/current waveform, time and temperature [19][20][21][22]. This illustrates the vast amount of parameters available for the creation of a wide range of interesting materials.…”

Section: Introductionmentioning

confidence: 99%

Utilising solution dispersed platinum nanoparticles to direct the growth of electrodeposited platinum nanostructures and its influence on the electrocatalytic oxidation of small organic molecules

Lertanantawong

Surareungchai

O’Mullane

2016

Journal of Electroanalytical Chemistry

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The electrodeposition of platinum nanostructures on glassy carbon electrodes in the absence and presence of platinum nanoparticles in the electrolyte is reported. It is found that the presence of platinum nanoparticles has a significant influence of the morphology of the platinum electrodeposited onto the electrode surface. Even though the morphology of the materials is affected, the overall surface area is similar. The electrochemical behaviour of the platinum nanostructures is investigated in 1 M H 2 SO 4 where distinct differences are observed in the exposed surface sites for platinum electrodeposited in the presence of nanoparticles. The influence of these surface sites is then studied for a variety of electrocatalytic reactions such as methanol and ethylene glycol oxidation and the hydrogen evolution reaction. In the case of organic molecule oxidation reactions, the platinum structures created using platinum nanoparticles in the electrodeposition solution exhibited earlier onset potentials and increased current densities compared to those that were electrodeposited in their absence.

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Effect of bromide ions and polyethylene glycol on morphological control of electrodeposited copper foam

Cited by 27 publications

References 21 publications

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

Formation of nanostructured porous Cu–Au surfaces: the influence of cationic sites on (electro)-catalysis

3-D Network Pore Structures in Copper Foams by Electrodeposition and Hydrogen Bubble Templating Mechanism

Utilising solution dispersed platinum nanoparticles to direct the growth of electrodeposited platinum nanostructures and its influence on the electrocatalytic oxidation of small organic molecules

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