Fabrication, microstructure and electrocatalytic property of novel nanoporous palladium composites

Wang, Xiaoguang; Wang, Weimin; Zhang, Qi; Zhao, Changchun; Ji, Hong; Zhang, Zhonghua

doi:10.1016/j.jallcom.2010.08.094

Cited by 51 publications

(31 citation statements)

References 51 publications

(75 reference statements)

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“…Yin et al [147] prepared Pd nanoparticles and the ethanol oxidation on the Pd catalysts took place at a more negative anodic potential, implying a reduced overpotential. Wang et al [148] fabricated nanoporous Pd composites through chemical dealloying of the Al70Pd30 alloy. The nanoporous Pd composites had high electrochemical active surface areas and exhibited remarkable catalytic activities toward ethanol oxidation in alkaline media.…”

Section: Other Structuresmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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This review selectively summarizes the latest developments in the Pd-based cataysts for low temperature proton exchange membrane fuel cells, especially in the application of formic acid oxidation, alcohol oxidation and oxygen reduction reaction. The advantages and shortcomings of the Pd-based catalysts for electrocatalysis are analyzed. The influence of the structure and morphology of the Pd materials on the performance of the Pd-based catalysts were described. Finally, the perspectives of future trends on Pd-based catalysts for different applications were considered.

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Section: Other Structuresmentioning

confidence: 99%

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

2015

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“…Dealloying of rapidly solidified Al 70 Pd 30 comprised of Al 3 Pd and Al 3 Pd 2 phases has led to a tortuous nanoporous Pd structure (3-25 nm) in the regions of native Al 3 Pd, while the native Al 3 Pd 2 regions demonstrated immunity to dealloying and remained intact, yielding a "composite" of nanoporous and solid metal regions. 17 With the adjustment of electrochemical parameters in dealloying processes and introduction of subsequent annealing, pore sizes can be tuned. 3,5,15,17,18 Dealloying for the creation of nanoporous metals is largely limited in scope to favor precious noble metals.…”

Section: Introductionmentioning

confidence: 99%

“…17 With the adjustment of electrochemical parameters in dealloying processes and introduction of subsequent annealing, pore sizes can be tuned. 3,5,15,17,18 Dealloying for the creation of nanoporous metals is largely limited in scope to favor precious noble metals. However, Rahman et al recently demonstrated the applicability of an analogous electrochemical dealloying technique to the NiAl system (Ni 30 Al 70 ) to produce nanoporous nickel; the distribution of pore sizes was wider than that of traditional Au-Ag systems, and the process was highly sensitive to the composition of the parent alloy.…”

Section: Introductionmentioning

confidence: 99%

Template-based fabrication of nanoporous metals

Rebbecchi

Chen

2017

J. Mater. Res.

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Nanoporous metallic foams with high surface area and novel functional behavior are positioned to stimulate new multifunctional and metamaterial applications. However, there are fundamental challenges in achieving uniform nanopores and tailorable morphology. Emerging templating methods offer a wide range of applicable metallic species while enhancing control of pore morphology, uniformity, and interconnectivity. Here, a critical review of nanoporous metal fabrication is presented, with focus on templating methods utilizing nanoporous polymeric templates. Metals are introduced into percolative nanochannels of sacrificial templates by deposition, and subsequent removal of templates yields ordered nanoporous metals. We introduce approaches for preparing nanoporous templates, including utilizing block copolymer self-assembly that yields periodic gyroid networks. While metallization of templates by electrodeposition has been demonstrated, electroless deposition permits uniform deposition by many metallic species and infiltration of narrow pores. Examples of nanoporous metals with uniform pore sizes below 50 nm fabricated by templating methods are examined.

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“…Many NPCs have been prepared from crystalline alloys. 1,38) The effects of the intermetallic phase in AlCu, 4,6,7) MnCu, 5,10) AlPd, 4,9) AlAu, 11) AgAu, 1,8) NiMn 12) binary alloys on the final nanoporous structure were investigated extensively. The final nanoporous metals have a sort of multimodal pore-to-ligament structures with various distribution of pore sizes and ligaments from one zone to another one.…”

Section: Introductionmentioning

confidence: 99%

Dealloying Behaviours of an Equiatomic TiCu Alloy

et al. 2013

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The crystalline Ti 50 Cu 50 ribbon was prepared by annealing its amorphous counterpart at 773 K, 84 K higher than its crystallization temperature. An equiatomic TiCu intermetallic phase dominated in the matrix coexisting with trace Ti 2 Cu phase segregated on the grain boundary. A bi-continuous nanoporous copper from tenths of nanometers to hundredths of nanometers was obtained after dealloying the crystalline Ti 50 Cu 50 ribbons in 0.03 and 0.13 kmol/m 3 HF solutions. The TiCu phase stayed inert at the initial immersion and the Ti 2 Cu zone preferentially dissolved to form trenches. After a prolonged immersion in HF solutions, both TiCu and Ti 2 Cu phases were fully dealloyed. Final nanoporous Cu had a multiple-channel characteristic in different regions where various intermetallic phases distributed. Finer nanoporous Cu formed in the regions where the TiCu phase with a higher electrochemical stability dominated.

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Fabrication, microstructure and electrocatalytic property of novel nanoporous palladium composites

Cited by 51 publications

References 51 publications

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

Template-based fabrication of nanoporous metals

Dealloying Behaviours of an Equiatomic TiCu Alloy

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