Fabrication and characterization of bulk nanoporous Cu with hierarchical pore structure

Kong, Qingquan; Feng, Wei; Zhu, Xiaodong; Sun, Chenghua; Ma, Juan; Wang, Xiaolian

doi:10.1007/s10853-017-1356-3

Cited by 6 publications

(5 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The fundamentals and mechanisms of dealloying processes have been reviewed by several researchers . Among the dealloyed nanoporous metals, nanoporous Cu is of particular interest, because of its low cost and suitability for large‐scale production . Several attempts have been made, in recent years, to partially substitute noble metals, such as Pt and Ag, on nanoporous Cu to fabricate novel bimetallic electrocatalysts .…”

Section: Introductionmentioning

confidence: 99%

“…[26][27][28]32] Among the dealloyed nanoporous metals, nanoporous Cu is of particular interest, because of its low cost and suitability for large-scale production. [33] Several attempts have been made, in recent years, to partially substitute noble metals, such as Pt and Ag, on nanoporous Cu to fabricate novel bimetallic electrocatalysts. [34][35][36] These bimetallic electrocatalysts have proven to be cost-effective alternatives to monolithic noble metal electrocatalysts, and in some cases, show improved electrocatalytic properties, presumably owing to electronic coupling between different metals.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Zhang

Michel

et al. 2019

ChemElectroChem

View full text Add to dashboard Cite

The hydrogenation of 5‐hydroxymethylfurfural (HMF), an important bio‐based platform chemical, to 2,5‐bis(hydroxymethyl)furan (BHMF), a promising building block for polymers, is conventionally conducted at high pressures of H2 in the presence of heterogeneous catalysts. Recently, electrochemical hydrogenation has emerged as a promising process for BHMF production; however, one challenge of this process is to improve the catalytic activity of the electrocatalyst. In this study, a series of AgCu electrocatalysts was prepared by galvanic displacement of Ag on nanotextured Cu particles. A comprehensive characterization of the catalysts was carried out and the effects of electrolysis potential, reaction time, and HMF concentration were investigated. The concentration of AgNO3 solution in which Cu was displaced was found to be a key factor to control the catalyst surface morphology, and the optimal catalyst was shown to have high catalytic activity and excellent stability for the electrochemical hydrogenation of HMF to BHMF.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Zhang

Michel

et al. 2019

ChemElectroChem

View full text Add to dashboard Cite

show abstract

“…8 The high surface area-to-volume ratio of np-Cu structures leads to a decrease in its melting temperature, which is advantageous for low-temperature sintering. 9 The fabrication of np-Cu is achieved by the de-alloying of typical precursor alloys like Cu-Al, 10,11 Cu-Mn, 12,13 and Cu-Zn. 11,14 Brass is an excellent candidate for np-Cu synthesis because it forms a single phase binary alloy 5,15 and its electrodeposition has been studied extensively in literature.…”

mentioning

confidence: 99%

Electrodeposition of Zn-rich Cu_xZn_(1−x)Films with Controlled Composition and Morphology

Castillo

Dimitrov

2021

J. Electrochem. Soc.

View full text Add to dashboard Cite

Zn-rich CuxZn(1−x) alloy films (60–88 at% Zn) are grown in a pyrophosphate-based bath via potentiostatic deposition as a precursor for the synthesis of nanoporous Cu. Voltammetric studies show a selective negative shift in the reduction potential of Cu after its complexation with pyrophosphate, allowing for co-reduction of Cu and Zn at similar potential ranges. Anodic stripping characterization reveals a distinct three-stage alloy dissolution behavior that enables the estimation of the alloys’ compositions. Moreover, a systematic study has been done to determine the optimal conditions for Cu–Zn electrodeposition routines at current efficiency of 63%–73% with precise control over the elemental composition and morphology of the alloy. Scanning electron micrographs reveal highly crystalline and uniform alloy deposits, while energy dispersive X-ray spectroscopy results suggest tunability of the alloys’ elemental composition by simple adjustment of the precursor Cu2+:Zn2+ ratio in the deposition bath at the optimized potential of −2.0 V vs MSE. CuxZn(1−x) alloys of similar elemental composition and morphological quality were also electrodeposited on Cu and glassy carbon substrates. Finally, X-ray diffraction patterns of the electrodeposited alloys reveal the presence of CuZn5 and Cu5Zn8 intermetallic compounds that represent brass alloys in the composition range of interest.

show abstract

“…In contrast, the dealloying method is thought to be a more efficient way to fabricate nanoporous metals by selectively etching one or more active elements from the precursor while noble metal atoms would diffuse and agglomerate into the nanoporous structure . Also, the morphology of the pores could be effectively controlled by adjusting the dealloying conditions, which can form a single-scale porous structure or even hierarchical porous structure …”

Section: Introductionmentioning

confidence: 99%

“…20 Also, the morphology of the pores could be effectively controlled by adjusting the dealloying conditions, which can form a singlescale porous structure 21 or even hierarchical porous structure. 22 The cycling performance of the Sn anode has been greatly improved by conducting these kinds of nanoporous metals as the current collector. For example, Yu 23 prepared a nanoporous Au current collector in size of 50 nm by dealloying, and Sn nano-particles were then electroless plated on it.…”

Section: Introductionmentioning

confidence: 99%

3D Hierarchical Porous Cu-Based Composite Current Collector with Enhanced Ligaments for Notably Improved Cycle Stability of Sn Anode in Li-Ion Batteries

Luo

Yang

et al. 2018

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A 3D porous Cu current collector used in Li-ion batteries can improve the cycling performance of Sn anodes with high specific capacity because of the accommodation of large volume expansion by the pores. However, the pure Cu ligament is too soft to endure enough stress from volume expansion, and then it leads to the fast fade of capacity because of the formation of cracks or the collapse of the 3D porous structure. In this study, a novel micro-nano 3D hierarchical porous Cu-based composite current collector with enhanced ligaments has been fabricated by one-step dealloying of the Cu-34Zn-6Al (wt %) precursor and subsequent heat treatment. The pore and microstructure evolutions during dealloying and heat treatment have been studied by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. To confirm the validity of the 3D porous Cu/β/γ composite current collector, Sn has been directly electroless plated on it in comparison with the porous pure Cu and the common Cu foil. It is found that the Sn-coated 3D hierarchical porous Cu/β/γ composite current collector with higher hardness shows significantly improved cycling stability compared with the Sn-coated 3D porous Cu current collector and the planar copper foil.

show abstract

Fabrication and characterization of bulk nanoporous Cu with hierarchical pore structure

Cited by 6 publications

References 36 publications

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Electrodeposition of Zn-rich Cu_xZn_(1−x)Films with Controlled Composition and Morphology

3D Hierarchical Porous Cu-Based Composite Current Collector with Enhanced Ligaments for Notably Improved Cycle Stability of Sn Anode in Li-Ion Batteries

Contact Info

Product

Resources

About

Fabrication and characterization of bulk nanoporous Cu with hierarchical pore structure

Cited by 6 publications

References 36 publications

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Efficient Electrochemical Hydrogenation of 5‐Hydroxymethylfurfural to 2,5‐Bis(hydroxymethyl)furan on Ag‐Displaced Nanotextured Cu Catalysts

Electrodeposition of Zn-rich CuxZn(1−x)Films with Controlled Composition and Morphology

3D Hierarchical Porous Cu-Based Composite Current Collector with Enhanced Ligaments for Notably Improved Cycle Stability of Sn Anode in Li-Ion Batteries

Contact Info

Product

Resources

About

Electrodeposition of Zn-rich Cu_xZn_(1−x)Films with Controlled Composition and Morphology