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Showing 1 to 20 of 159 for “"noble metal"”.
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Colours and other optical properties of binary noble metal-noble metal alloys
… and experimental that are related to the noble metals or the experimental technique used. Sample requirements are discussed and the preparation methods adopted are described. Relevant electronic, optical and colorimetric theory is presented and unified in a computational system that takes …
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Photoemission studies of noble metal semiconductor systems
… properties of semiconductor surfaces and of thin metallic films deposited upon them is a topic of fundamental and practical interest. Clean and Au and Ag covered surfaces of Ge(lll)-c(Zx8), Si(lll)-(7x7), Ge(lOO)-(Zxl), and Si(lOO)-(Zxl) are studied in this work with high-resolution core-level, …
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Carboxylic Acid Hydrodeoxygenation over Supported Noble Metal Catalysts
… acid hydrodeoxygenation (HDO) over supported noble metal catalysts was carried out in order identify the main challenges associated with supported monometallic catalysts and identifying solutions that may increase the practicality of these high activity metals. Using propionic acid as a probe …
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Catalytic Hydrodeoxygenation of Guaiacol over Noble Metal Catalysts
… for oxygen removal from pyrolysis bio-oils and noble metal catalysts have shown promising activities, especially as compared to the traditional hydrodesulphurization catalysts (e.g. CoMo/Al2O3 and NiMo/Al2O3). However, further understanding and development of the catalysts through improving …
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CO2 reduction over noble metal/carbon nanotube catalyst
Carbon nanotube-based Pt/Pd and Ru catalysts, independently synthesized by a microwave reaction technique, show good catalytic activity for CO2 reduction in the contexts of dry reforming (DR) of methane (CH_4 + CO_2 -> 2CO + 2H_2) and reverse water gas shift (RWGS) (H2 + CO_2 -> CO + H_2O). …
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Fabrication, characterisation, and analysis of plasmonic noble metal nanostructures
… The ability to tailor the plasmonic response of metallic nanostructures, based on many, easily tuneable, properties, is the foundation for much of the current research, as this will allow for the efficient integration of plasmonic components into a wide range of existing photonic and laser …
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Noble-metal quantum well structures: A theoretical and experimental study
Currently, there is a great deal of interest in metallic multilayer systems, in particular magnetic multilayer structures, for both technological and scientific reasons. Since the growth properties and band structures for these systems are, in general, quite complicated, most current research is …
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Engineering carbide nanoparticles coated with noble metal monolayers for catalysis
The noble metals (NMs) comprise ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), osmium (Os), iridium (Ir), platinum (Pt), and gold (Au). Together, these corrosion-resistant elements serve as nature's universal catalysts by binding reactant molecules neither too strongly nor too weakly. …
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Quantum mechanical origin of the plasmonic properties of noble metal nanoparticles
… show that the plasmon modes of both acenes and metallic nanoparticles can be described with a simple configuration interaction (CI) interpretation. The evolution between molecular absorption spectrum and plasmon is also investigated by computing the density of states of spherical …
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Synthesis and Activation of Nanoscale Dendrimer-Derived Supported Noble Metal Catalysts
… as templates for the preparation of supported metal catalysts. This approach takes advantage of several unique characteristics of these dendrimers such as the ability to complex metal cations in solution and to protect them from aggregation until they are impregnated onto a support. After the …
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Catalytic Studies Of Noble Metal Nanocatalysts Using Single-Molecule Fluorescence Microscopy
Noble metal nanoparticles are an important class of catalysts. However they are inherently heterogeneous, which makes studying them at the single-particle level desirable, as it then becomes possible to quantify these differences. A highthroughput fluorescence microscopy technique was developed in …
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Water-gas shift conversion in microchannel reactors using noble metal catalysts
… or other conditioning prior to restart. Only noble metal based catalysts meet these requirements at present.This study was aimed at the water-gas-shirhift (WGS) stage within this train. The basis of the study was the comparison of three commercial supported noble metal WGS catalysts and a …
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Design and fabrication of non-noble-metal electrocatalysts for oxygen reduction reactions.
… emission. However, a current fuel cell requires noble-metal catalysts (in most cased platinum, Pt) to accelerate the electrode reactions. As a result of the high cost of Pt, the commercialization of fuel cell has been severely hindered. Thus, it is exceptionally important to search for an …
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Non-noble metal nanocatalysts for the purification and reduction of carbon dioxide
… challenges at hand. Nanostructures based on non-noble metals have been traditionally understudied due to their high chemical instability in both synthesis and application. The unique sensitivity and chemical reactivity of their nanostructures, however, offer the possibility for designing new …
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Engineering Noble-Metal Nanoparticles for Sensing and Imaging with Surface-Enhanced Raman Scattering
… simply depositing a single Ag nanocube on a metal substrate can increase its SERS enhancements to levels capable of single-molecule detection. In the second part of this work I used SERS as a molecular probe to understand how glucose molecules interact at a nanocube's surface, and as an …
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CREEP CORROSION OVER PLASTIC ENCAPSULATED MICROCIRCUIT PACKAGES WITH NOBLE METAL PRE-PLATED LEADFRAMES
… A range of plastic encapsulated packages with noble metal pre-plated leadframes, from different vendors, with different package attributes, were used in this study. Creep corrosion on the mold compound surface was reproduced in an accelerated manner using mixed flowing gas (MFG) testing in …
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Transition metal carbide and nitride nanoparticles with Noble metal shells as enhanced catalysts
… design platform for enhancing the performance of noble metal catalysts while reducing the cost. Early transition metal carbides (TMCs) and nitrides (TMNs) have been identified as ideal core materials for supporting noble metal shells owing to their earth-abundance, thermal and chemical stability, …
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