Fabrication and Degradation Properties of Nanoporous Copper with Tunable Pores by Dealloying Amorphous Ti-Cu Alloys with Minor Co Addition

Xiang, Yue; Hu, Rui; Qi, Jiqiu; He, Yezeng; Meng, Qingkun; Wei, Fuxiang; Ren, Yaojian

doi:10.1007/s11665-021-05491-z

Cited by 10 publications

(6 citation statements)

References 52 publications

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“…Although this issue has been well-known for many decades, for example, in the fields of porous semiconductors − or silica aerogels, it is hardly appreciated in the context of nanoporous metal preparation. The drying technique below, adopted from protocols for mesoporous silicon, has proved useful in the making of nanoporous metals. , …”

Section: Tuning Of Structure and Composition During Dealloyingmentioning

confidence: 99%

“…The drying technique below, adopted from protocols for mesoporous silicon, 194 has proved useful in the making of nanoporous metals. 198,199 An efficient way to minimize capillary-induced stresses is to transfer the nanoporous metals from the preparation medium first into water, then into ethanol and finally into n-pentane, whereupon the samples are deposited on glass and allowed to dry. This procedure profits from the considerably lower surface tension of n-pentane, which is γ LV = 14 mJ/m 2 as opposed to the 72 mJ/m 2 of water.…”

Section: Dealloying Potential and Postdealloyingmentioning

confidence: 99%

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Nanoporous Gold: From Structure Evolution to Functional Properties in Catalysis and Electrochemistry

et al. 2023

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Nanoporous gold (NPG) is characterized by a bicontinuous network of nanometer-sized metallic struts and interconnected pores formed spontaneously by oxidative dissolution of the less noble element from gold alloys. The resulting material exhibits decent catalytic activity for low-temperature, aerobic total as well as partial oxidation reactions, the oxidative coupling of methanol to methyl formate being the prototypical example. This review not only provides a critical discussion of ways to tune the morphology and composition of this material and its implication for catalysis and electrocatalysis, but will also exemplarily review the current mechanistic understanding of the partial oxidation of methanol using information from quantum chemical studies, model studies on single-crystal surfaces, gas phase catalysis, aerobic liquid phase oxidation, and electrocatalysis. In this respect, a particular focus will be on mechanistic aspects not well understood, yet. Apart from the mechanistic aspects of catalysis, best practice examples with respect to material preparation and characterization will be discussed. These can improve the reproducibility of the materials property such as the catalytic activity and selectivity as well as the scope of reactions being identified as the main challenges for a broader application of NPG in target-oriented organic synthesis.

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Section: Tuning Of Structure and Composition During Dealloyingmentioning

confidence: 99%

Section: Dealloying Potential and Postdealloyingmentioning

confidence: 99%

Nanoporous Gold: From Structure Evolution to Functional Properties in Catalysis and Electrochemistry

et al. 2023

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“…C 1s and O 1s peaks can be detected from the XPS spectrum, at 284.8 eV and 532. 6 eV respectively (see figure 3(a)) [33,34]. According to the previous studies [35,36], the main LM2 peaks of Cu 0 and Cu + are located at 568.0 eV and 570.0 eV, respectively.…”

Section: Microstructure Characterization Of Np-cu Powdersmentioning

confidence: 64%

Degradation performance and mechanism toward methyl orange via nanoporous copper powders fabricated by dealloying of ZrCuNiAl metallic glassy precursors

Gu¹,

Wang²,

Hui³

et al. 2022

Nanotechnology

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The catalyst of nanoporous Cu (NP-Cu) powders, with the chemical composition of Cu79.63Ni6.85O13.53 (at.%), was successfully fabricated by dealloying of Zr-Cu-Ni-Al metallic glassy precursors. The as-prepared NP-Cu powders, co-existing with Cu2O phase on Cu ligament surface, had a three-dimensional (3D) network porous structure. The NP-Cu powders/H2O2 system showed superior catalytic degradation efficiency toward azo dyes in both acidic (pH 2) and neutral (pH 7) environments. Moreover, the cyclic tests indicated that this powder catalyst also exhibited good durability. A novel degradation mechanism of NP-Cu powders/H2O2 was proposed: the high degradation performance in acidic environment was mainly derived from heterogeneous reaction involved with a specific pathway related to Cu3+ to produce HO•, while in neutral environment it was primarily resulted from homogeneous reaction with the generation of HO• from the classical Cu-based Fenton-like process. This work indicates that the NP-Cu powders have great potential applications as catalysts for wastewater treatments.

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“…as anode materials for lithium-ion batteries, [10][11][12] as catalysts [13][14][15] and for sensors. 16 In the literature, synthesis of npCu from AlCu, [16][17][18][19][20] SnCu, 11 TiCu, 21 CeCu, 22 NiCu, 17 ZnCu 17,23,24 and CuMn [25][26][27] has been reported, whereby the resulting nanoporous structures differ greatly depending on experimental parameters and alloy composition. Among them, nanoporous copper from copper-manganese gained a lot of interest as it exhibits one of the largest differences in electrochemical potential (difference of 1.477 V between Mn/Mn 2+ and Cu/Cu 2+ ) 28 from the alloys mentioned above.…”

Section: Introductionmentioning

confidence: 99%

Porosity evolution and oxide formation in bulk nanoporous copper dealloyed from a copper–manganese alloy studied by in situ resistometry

et al. 2023

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Fabrication and Degradation Properties of Nanoporous Copper with Tunable Pores by Dealloying Amorphous Ti-Cu Alloys with Minor Co Addition

Cited by 10 publications

References 52 publications

Nanoporous Gold: From Structure Evolution to Functional Properties in Catalysis and Electrochemistry

Nanoporous Gold: From Structure Evolution to Functional Properties in Catalysis and Electrochemistry

Degradation performance and mechanism toward methyl orange via nanoporous copper powders fabricated by dealloying of ZrCuNiAl metallic glassy precursors

Porosity evolution and oxide formation in bulk nanoporous copper dealloyed from a copper–manganese alloy studied by in situ resistometry

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