Enhanced co-catalytic effect of Cu-Ag bimetallic core-shell nanocomposites imparted to TiO2 under visible light illumination

Monga, Anila; Rather, Rayees Ahmad; Pal, Bonamali

doi:10.1016/j.solmat.2017.08.002

Cited by 18 publications

(3 citation statements)

References 64 publications

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“…As a result, robust methods have been developed to produce particles of many different metals in many shapes. 53,54 The future of nanoparticle research is now looking to control the precise placement of atoms within nanoparticles, specifically the atomic ordering and heterointerfaces interactions, as a new means to control and develop new nanoparticle properties. 55,56 The following sections will explore the synthetic methods for producing nanoparticles and the current palladium nanocatalysts.…”

Section: Fuel Cellsmentioning

confidence: 99%

“…This method was chosen as it allows for finer control over the size and shape of nanocrystals than the topdown approach, as well as is well-established in the literature for the synthesis of nanoparticles of various sizes, shapes, and compositions. 53,54 Principles of solution-phase synthesis.-LaMer and Dinegar proposed the general model for the synthesis of nanoparticles in the solution phase. 46 The model plots the concentration of monomers in solution vs time, shown in Fig.…”

Section: Fuel Cellsmentioning

confidence: 99%

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Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

Parkash

Islam²,

Pirzada³

et al. 2022

ECS J. Solid State Sci. Technol.

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The direct methanol fuel cell (DMFC) is a fuel cell technology capable of generating energy through the electrochemical oxidation of methanol. The methanol oxidation reaction (MOR), which occurs at the anode, is of interest for producing renewable energy. This process relies on precious metal catalysts to efficiently produce energy, namely nanoscale Pt-Ru. Current fuel cell technology is, therefore, expensive, and unsuitable for large-scale implementation. Palladium can act as an electrocatalyst for the process, similar to platinum. However, its monometallic form suffers from high overpotentials and significant poisoning by carbon monoxide (CO) generated in situ. Previous research has shown improved activity of palladium in alkaline electrolytes, which, while unsuitable for platinum, are known to enhance alcohol oxidation reaction kinetics through preferred oxidation of methanol. The addition of a secondary metal assists in both modulations of palladium-reactant binding strengths and co-catalyzed oxidation of CO when exposed to the surface. This article reviews the literature on DMFC and anode electrocatalysts. The current platinum catalysts and foundation knowledge of the mechanism of platinum are compared to current palladium catalysts. The requirements for new nanoscale palladium catalysts and background on their synthesis are outlined.

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Section: Fuel Cellsmentioning

confidence: 99%

Section: Fuel Cellsmentioning

confidence: 99%

Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

Parkash

Islam²,

Pirzada³

et al. 2022

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…For example, Ag has a reduction potential of +0.79 V versus NHE for the AgI (aqueous) /Ag metal system, whereas for the AgI (aqueous) /Ag atom system, it is −1.80 V versus NHE. Prof. T. Pal and his group has exhaustively and systematically explored this domain of plasmonic nanometallic catalysts for reduction of nitroaromatics. ,− A high rate of conversion of 4-nitrophenol to 4-aminophenol was achieved by functionalization of TiO 2 and Cu-doped TiO 2 with silver nanoparticles in the presence of hydrazine. , Trace amounts of Ag- and Au-doped TiO 2 could efficiently reduce nitrobenzene to aniline with a high rate and good product selectivity. ,, An effective heterojunction between bimetallic nano-sized Ag and Au on TiO 2 due to the low Schottky barrier could efficiently accept electrons from the CB of TiO 2 , which showed better photoreduction of nitrobenzene than the corresponding monometallic catalyst. − Interesting results were observed when Pt group metals were dispersed over TiO 2 for nitroarene reduction . Supported metal catalysts on different facets behaved differently in photoreduction of nitrobenzene .…”

Section: Photocatalytic Reduction Of Nitroarenesmentioning

confidence: 99%

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Roy

2020

J. Phys. Chem. C

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This Mini-Review Article is a critical compendium of recent advances in the photocatalytic reduction of the priority pollutants nitroarenes and aqueous nitrate over various semiconducting materials. The photocatalytic reduction of nitroarenes produces useful industrial intermediate compounds, whereas the photocatalytic reduction of aqueous nitrates leads to the formation of harmless N 2 or NH 3 as a potential alternative to the Haber−Bosch process. This Mini-Review Article looks at the physical chemistry aspects of the photocatalytic materials as well as their respective optical band structure, surface morphology, size, crystalline structure, and polymorphic phases. The photocatalysts are categorized into five major segments: (a) band-engineered semiconducting photocatalysts, (b) quantum dots, (c) anionic and transition-metal-doped photocatalysts for optimum mid-gap states, (d) organic dyes or plasmonic metal-supported photocatalysts, and (e) photocatalysts with heterojunctions. Pristine and doped band-engineered TiO 2 stands out as the most explored class of materials for photoreduction of nitroarenes and nitrates. Other semiconductor oxides, like perovskites, layered graphitic-C 3 N 4 , graphene derivatives, and chalcogenides, are also discussed in this Mini-Review Article. The mechanistic details of the photocatalytic reduction of nitroaromatics and aqueous nitrates in correlation with the materials' physical properties are critically explored, with an overall conclusion at the end.

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Hydrothermal synthesis and characterization of CuO–CoO/TiO2 for photocatalytic degradation of methylene blue under visible light and catalytic reduction of P-nitrophenol

Shammi

Kianfar

Momeni

2020

J Mater Sci: Mater Electron

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Enhanced co-catalytic effect of Cu-Ag bimetallic core-shell nanocomposites imparted to TiO2 under visible light illumination

Cited by 18 publications

References 64 publications

Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

Bimetallic Gold-Palladium Nanoparticles: Applications in Methanol and Ethanol Oxidation Reactions

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Hydrothermal synthesis and characterization of CuO–CoO/TiO2 for photocatalytic degradation of methylene blue under visible light and catalytic reduction of P-nitrophenol

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