Highly-reactive AgPt nanofern composed of {001}-faceted nanopyramidal spikes for enhanced heterogeneous photocatalysis application

Umar, Akrajas Ali; Rahmi, Elvy; Balouch, Aamna; Rahman, Mohd Yusri Abd; Salleh, Muhamad Mat; Oyama, Munetaka

doi:10.1039/c4ta03518f

Cited by 44 publications

(18 citation statements)

References 50 publications

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“…The achievements in synthesis of nanoparticles (NPs) and construction of nanostructures have provided more opportunities for research ranging from advanced magnetic recording media to biomedical probes, electrode materials, , and catalysts. − Careful design and synthesis of a size- and shape-controlled catalyst at the nanometer level were gradually realized. ,,, This is beneficial for understanding the nature of active sites, the mechanism of a specific reaction process, and the origin of structure reactivity. The multidimensional-assembled structure of NPs often exhibits unique performances in a heterogeneous reaction due to their unique morphology. , …”

Section: Introductionmentioning

confidence: 99%

Ru Nanospheres in Water Drops for Enhanced Catalytic Performances in Selective Hydrogenation

Peng

Miao

et al. 2018

ACS Appl. Energy Mater.

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In heterogeneous catalysis, especially in the presence of a hydrophilic and hydrophobic mixed solution, the relationship between a nano-/microscale dynamic system and catalytic performance is an unknown but very significant issue. Here, from the result of a coupling liquid−liquid− solid CFD-EDEM (CFD, computational fluid dynamics) simulation as well as a high-speed recording system, we found that it is favorable for the solid catalyst granules to stay in electrolyte water drops to construct instant soft core−shell (SCS) structures in an agitating condition. Different morphologies of Ru catalysts resulting in different water shells are responsible for the different hydrogenation performances. Ru nanosphere (NS) catalysts exhibit higher cyclohexene selectivity (S 40 = 66.6%) than other morphologies in benzene-selective hydrogenation. Because the water shells formed around Ru NSs are uniform and in appropriate depth, this benefits the diffusion of cyclohexene and the inhibition of cyclohexane. On the basis of the promotion effect of the electrolyte shell around the catalyst in an agitated reaction, a "teardrop catalysis" model process is proposed for an agitated oil−water phase in a heterogeneous reaction. This model is also verified in CAL-selective (cinnamaldehyde-selective) hydrogenation and employed to improve cinnamyl alcohol (COL) selectivity. This work provides a new way of exploring physical effects for selective heterogeneous catalytic reactions.

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Section: Introductionmentioning

confidence: 99%

Ru Nanospheres in Water Drops for Enhanced Catalytic Performances in Selective Hydrogenation

Peng

Miao

et al. 2018

ACS Appl. Energy Mater.

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“…The AgPt nanofern on an indium tin oxide (ITO) substrate was prepared by following our earlier reported technique. 37 Briefly, in the typical process, a clean ITO substrate was immersed into an aqueous solution that contains 1 mM K 2 PtCl 6 (Fluka), 0.2 mM silver(I) nitrate (Fluka), 10 mM formic acid (Fluka), and 10 mM sodium dodecyl sulfate (SDS) (99.9%, Fluka). The volume of the reaction was 15 mL.…”

Section: Methodsmentioning

confidence: 99%

“…Recently, we demonstrated the formation of the AgPt nanostructure and evaluated its catalytic performance in methyl orange degradation. 37 A unique immiscibility of Ag in the Pt lattice and a high-difference in their ionic radii have promoted the formation of the highly anisotropic nanostructure of AgPt, i.e., the nanofern-like structure, a hierarchical structure that is composed of isosceles tetrahedral nanopyramids. Their performance is exceptionally high compared to the conventional Pt nanoparticle catalyst or other catalyst systems.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Bimetallic AgPt Nanoferns as High-Performance Catalysts for Selective Acetone Hydrogenation to Isopropanol

et al. 2018

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A combinative effect of two or more individual material properties, such as lattice parameters and chemical properties, has been well-known to generate novel nanomaterials with special crystal growth behavior and physico-chemical performance. This paper reports unusually high catalytic performance of AgPt nanoferns in the hydrogenation reaction of acetone conversion to isopropanol, which is several orders higher compared to the performance shown by pristine Pt nanocatalysts or other metals and metal–metal oxide hybrid catalyst systems. It has been demonstrated that the combinative effect during the bimetallisation of Ag and Pt produced nanostructures with a highly anisotropic morphology, i.e., hierarchical nanofern structures, which provide high-density active sites on the catalyst surface for an efficient catalytic reaction. The extent of the effect of structural growth on the catalytic performance of hierarchical AgPt nanoferns is discussed.

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“…Platinum based bimetallic nanocrystal is amongs the metal nanoparticle that is used in a broad range of applications, such as catalysis [3], electrocatalysis [4], and sensing [5] due to its peculiar electrical and catalytic properties.Up to now, there are many Pt-based bimetallic nanostructures fabricated and performed an extraordinary catalytic properties in wide range of applications, particularly in acetone hydrogenation, electrocatalytic oxidation of methanol and the CO oxidation process. This paper report an effective approach to synthesize fibrous bimetallic CuPt nanoparticle that was prepared using liquid-phase deposition method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Fibrous Bimetallic CuPt Nanoparticles

Rahmi¹

2016

KEG

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This paper reports a facile methode for the synthesis offibrous bimetallic CuPt Nanoparticles (CuPt NPs) using the liquid phase deposition methods deposited directly on an indium-tin oxide (ITO) substrate. The electron microscopy analysis result shows that CuPt NPs, constructed by networked-nanorod of diameter ca. 3.5 nm and length approximately 5.5 to 6.5 nm, exhibits aquasi sphericalmorphology and fibrous structure with diameter approximately 196±98 nm. The differences of individual element miscibility and the effect of lattice-mismatch between Pt and Cu isthe key factorfor the formation of fibrous structure. XPS analysis indicated that the fibrous bimetallic CuPt NPs feature metallic properties with highly reactive surface. This may increase the charge-transfer reactions in catalytic, electrochemistry and sensors application.

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Highly-reactive AgPt nanofern composed of {001}-faceted nanopyramidal spikes for enhanced heterogeneous photocatalysis application

Abstract: Synthesis of nanopyramidal spike-composed nanofern of AgPt bimetals rich with {001} high-energy lattice planes on a substrate surface. The system exhibits excellent heterogeneous photocatalytic performance.

Cited by 44 publications

References 50 publications

Ru Nanospheres in Water Drops for Enhanced Catalytic Performances in Selective Hydrogenation

Ru Nanospheres in Water Drops for Enhanced Catalytic Performances in Selective Hydrogenation

Hierarchical Bimetallic AgPt Nanoferns as High-Performance Catalysts for Selective Acetone Hydrogenation to Isopropanol

Synthesis and Characterization of Fibrous Bimetallic CuPt Nanoparticles

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