Gold-based nanoalloys: synthetic methods and catalytic applications

Lu, Pengyi; Zhou, Jingwen; Hu, Yukun; Yin, Jinwen; Wang, Yunhao; Yu, Jinli; Ma, Yangbo; Zhu, Zonglong; Zeng, Zhiyuan; Fan, Zhanxi

doi:10.1039/d1ta03646g

Cited by 21 publications

(14 citation statements)

References 238 publications

(246 reference statements)

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“…Au NPs are important materials due to their unique properties. Alloying Au with other elements opens an even wider range of opportunities. , The presented synthesis strategy is suitable for obtaining Au x Pd y NPs, which have a wide range of applications, as illustrated below for (electro)catalysis. Here, ∼3–4 nm Pd NPs are easily obtained (see Figure a,b).…”

Section: Resultsmentioning

confidence: 99%

Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures

et al. 2023

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Gold nanoparticles (Au NPs) and gold-based nanomaterials combine unique properties relevant for medicine, imaging, optics, sensing, catalysis, and energy conversion. While the Turkevich–Frens and Brust–Schiffrin methods remain the state-of-the-art colloidal syntheses of Au NPs, there is a need for more sustainable and tractable synthetic strategies leading to new model systems. In particular, stabilizers are almost systematically used in colloidal syntheses, but they can be detrimental for fundamental and applied studies. Here, a surfactant-free synthesis of size-controlled colloidal Au NPs stable for months is achieved by the simple reduction of HAuCl4 at room temperature in alkaline solutions of low-viscosity mono-alcohols such as ethanol or methanol and water, without the need for any other additives. Palladium (Pd) and bimetallic Au x Pd y NPs, nanocomposites and multimetallic samples, are also obtained and are readily active (electro)catalysts. The multiple benefits over the state-of-the-art syntheses that this simple synthesis bears for fundamental and applied research are highlighted.

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Section: Resultsmentioning

confidence: 99%

Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures

et al. 2023

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“…(a) LSV of catalysts recorded in 1 M KOH solution with iR correction; (b) corresponding Tafel slope of the LSV curves in (a); (c) capacitive current (estimated from the voltammetry scans in Figure S5) as a function of scan rates; (d) TOF at different overpotentials for various electrocatalysts in 1.0 M KOH solution; ,,− (e) Nyquist plot of nanoporous catalysts. The inset shows the equivalent circuit.…”

Section: Results and Discussionmentioning

confidence: 99%

Nanoporous AlMnYNiCoAu Catalysts for Hydrogen Evolution

Zou

Zang

Song

et al. 2022

ACS Appl. Nano Mater.

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An effective method based on hybridization strategy and de-alloying nanoporosity is reported for increasing the electrocatalytic activity of metallic glasses (MGs) in hydrogen evolution reaction (HER). Based on the alloying of noble Au, the electrochemical performance reaches the maximum at 3 at. % Au addition. An overpotential as low as 124 mV at 10 mA·cm–2 and a Tafel slope of 69 mV·dec–1 are achieved. Such a superior catalytic performance is attributed to the large specific surface area with abundant active sites and low charge-transfer resistance. It is interesting to note that the Au3 sample has large mixing entropy, which is derived from sluggish atomic diffusion, and forms thin nanoligaments during de-alloying and thus exhibits a large specific surface area. The present work could lead to an approach to further develop environmentally friendly amorphous electrocatalysts with high efficiency and excellent stability for HER in alkaline solution.

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“…Pt and its alloys are the most intensively studied ORR electrocatalysts, whereas the large-scale production of which is severely constrained by their rarity and high price. 302–305 In recent years, a series of emerging 2D materials have shown promising ORR applications. Among these materials, TMOs have been extensively used as ORR catalysts due to their high catalytic efficiency and low cost, but severely constrained by their poor electrical conductivity.…”

Section: Energy-related Applications Of Defective 2d Materialsmentioning

confidence: 99%

“…Pt and its alloys are the most intensively studied ORR electrocatalysts, whereas the large-scale production of which is severely constrained by their rarity and high price. [302][303][304][305] In recent years, a series of emerging 2D materials have shown (f) H adsorption energies of CoP@DrGO, CoP@rGO, graphene, Pt (111), and CoP. Insets: The optimized crystal structures for the H adsorption on both CoP@DrGO (left) and CoP@rGO (right).…”

Section: Oxygen Reduction Reaction To Date Proton Exchange Membrane F...mentioning

confidence: 99%

Defect engineering of two-dimensional materials for advanced energy conversion and storage

2023

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Gold-based nanoalloys: synthetic methods and catalytic applications

Abstract: Over the past decades, gold-based materials have drawn extensive interests due to their intriguing physical/chemical properties and excellent performance in a broad range of applications. Especially, the remarkable technical progress...

Cited by 21 publications

References 238 publications

Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures

Surfactant-Free Colloidal Syntheses of Gold-Based Nanomaterials in Alkaline Water and Mono-alcohol Mixtures

Nanoporous AlMnYNiCoAu Catalysts for Hydrogen Evolution

Defect engineering of two-dimensional materials for advanced energy conversion and storage

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