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Showing 1 to 20 of 27 for “"palladium(Pd)"”.
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Palladium (pd) decorated zinc oxide (ZnO) nanoparticles for gas sensing applications: meat spoilage gases
… to this, materials of ZnO decorated with palladium nanoparticles were synthesised using the hydrothermal method for the purpose of testing their gas sensing properties. After the synthesis of these nanoparticles, various characterization techniques for the investigation of both physical …
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Oxidation of Carbon Monoxide Over Ceria and Alumina Supported Palladium Catalysts
<p>Palladium catalysts on both Al2O3 and CeO2, supports were studied for efficacy in low temperature carbon monoxide oxidation. Calcination temperatures were varied between 500-900°C for alumina supported catalysts and shown to have no significant difference in activity. X-Ray Photoelectron …
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The Synthesis, Characterization, Spectroscopic and Biological Activity Studies of Pt(Ii) and Pd(Ii) Cyanoximates
Some of the platinum (Pt) and palladium (Pd) compounds are established anticancer inorganice pharmaceuticals. Substantial biological activity (growth regulation, antimicrobial, pesticide detoxifying) was also found during the last two decases of investigations of cyanoximes. An attempt has been …
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A Microelectromechanical-Cantilever Hydrogen Sensor with Palladium-Driven Bending and Piezoresistive Readout
… employs a MEMS structure that has H₂-responsive palladium (Pd) features. Once exposed to H₂, the Pd lattice expands as H₂ diffuses into it. This results in the structural deflection of a mechanically-mobile feature, in particular a cantilever. This deflection is measured using piezoresistors, …
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Engineering carbide nanoparticles coated with noble metal monolayers for catalysis
… (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. This allows …
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Development and testing of thin composite palladium membrane for membrane fuel cell processors.
The Palladium (Pd) based membranes have long been the focus of studies for the separation of hydrogen due to its high permeability and selectivity toward hydrogen. However, palladium is a precious metal and extremely expensive and its wider applications will depend largely on its ability to become …
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Electron microscopy characterisation of size-selected Pd clusters and industrial Pd catalysts
… presents an investigation into the morphology of palladium (Pd) size selected clusters and industrial Pd catalysts using high angle annular dark field scanning transmission electron microscopy (HAADF-STEM) technique. The driving force of this work is to establish reliable and efficient methods for …
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Development of oxorhenium complexes and bimetallic Re-Pd/C catalysts for perchlorate reduction in water
… oxophilic rhenium (Re) species with metallic palladium (Pd) nanoparticles on activated carbon support materials (Re-Pd/C). An oxorhenium(V) complex, Re(O)(hoz)2Cl (hoz = 2-(2’-hydroxyphenyl)-2-oxazoline), is synthesized as the precursor for a highly active metal center for oxygen atom transfer …
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Sensitivity, selectivity, and stability of a palladium-loaded single-walled carbon nanotube methane gas sensor
… of the SWNT. Here, SWNTs are loaded with palladium (Pd) nanoparticles using sodium dodecyl sulfate (SDS). The Pd-loaded SWNTs offer a detection mechanism for methane (CH 4) by comparing the PL intensity before and after exposure to CH₄.A significant PL change (relative to the experiment) …
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Nanoparticle-based Organic Energy Storage with Harvesting Systems
… (ZnO), erbium (Er), cadmium sulfide (CdS), palladium (Pd) and silver-platinum (AgPt) were used as charge storage elements in fabrication of metal-insulator-semiconductor (MIS) structure. The organic semiconductor and synthesized nanoparticles are tested to evaluate and characterize their …
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Palladium uptake and its effect on behavioural and molecular markers in the freshwater shrimp Gammarus pulex
… platinum group elements (PGEs), platinum (Pt), palladium (Pd), and rhodium (Rh), in automobile catalysts has led to increased levels of these metals in aquatic environments. However, data regarding acute toxicity and the sublethal effects of these metals on aquatic biota are limited. This study …
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The engine reformer : syngas production in engines using spark-ignition and metallic foam catalysts
… was used to perform methane POX using a palladium (Pd) washcoat catalyst deposited on a Fecralloy® disk. With > 150 °C intake temperatures, exhaust H2 to CO ratios of 1.0 were achieved with methane-air equivalence ratios (PM = 4.0 with varying amounts of CO2 to simultaneously perform …
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Separation And Use Of Oxygenated Byproducts From Non-Catalytically Cracked Triglycerides And Their Methyl Esters
… The acetic acid was reacted with ethylene over a palladium (Pd) catalyst to produce renewable vinyl acetate monomer (VAM). The VAM was purified using batch distillation to about 99 wt%. This work successfully demonstrated that a renewable product generated from TAG oil cracking is chemically …
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METAL NANOMATERIALS: SYNTHESIS, DESIGN, AND APPLICATIONS
… and ternary intermetallic compounds (e.g., Pt1-xPdxBi). By varying different halogen ions, we can get different morphologies of metal nanocrystals. We will further study the catalytic effect of Pd metal nanocrystals supported on silicon spheres and realize the hydrodeoxygenation reaction of …
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Nanoelectronic Devices using Carbon Nanotubes and Graphene Electrodes: Fabrication and Electronic Transport Investigations
… devices were found compared to control palladium (Pd contacted s-CNT devices. From the temperature dependent transport investigation, a lower Schottky barrier height for the m-CNT/s-CNT devices was found compared to the devices with control metal electrodes. The enhanced device …
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New Designs of Electrochemical H2O2 Based Biosensors For Advanced Medical Diagnosis
… nickel (Ni), rhodium (Rh), ruthenium (Ru), and palladium (Pd), adding to the Pt system. Colloidal chemical synthesis route and three-dimensional nanoporous design were used to demonstrate different properties of Pt alloys. The modified electronic and geometric structures of these metal-pairs …
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Interaction of trapped hydrogen with dislocations at low-temperature in deformed Pd
… until the phase transformation of the deformed PdH0.0008 was recently observed at low temperature. The purpose of this study was to investigate the phase behavior of the trapped solute influenced by the distorted dislocation environment. The phase behavior of the Cottrell atmosphere in deformed …
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Composite inorganic membranes for hydrogen reaction, separation and purification.
… separation, silica membrane for purification, palladium (Pd)-impregnated membrane and silica on gamma -alumina (y-alumina). The hydrogen permeation of the silica membrane prepared for hydrogen reaction was of the order of 10-7 mol/m2.s.pa, while the nitrogen permeance was of the order of 10- …
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Electron Transfer Processes between Hydrogen Sulfide and Humic Substances - Implications for Anaerobic Sulfur Cycling in Freshwater Ecosystems
… S (Sorg). For HA reduced by hydrogen (H2) on a Palladium (Pd) catalyst, even only a formation of Sorg was observed and no inorganic transformation products occurred. X-ray absorption near edge structure (XANES) spectroscopy supported Sorg to be mainly about zerovalent, such as thiols, organic …
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Coordination chemistry of unusual oxidation states of nickel and palladium relevant to homogeneous catalysis
… of Group 10 transition metals – nickel (Ni) and palladium (Pd) hold privileged positions in the realm of metal-mediated catalysis. Transition metal complexes containing these metals are some of the most active catalysts that have been developed for important areas including, but not limited to, …
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