Platinum Alloy Nanomaterials
Platinum Alloy Nanomaterials - Related Videos
06:52
Nanocrystalline Alloys and Nano-grain Size Stability
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2023
Source: Sina Shahbazmohamadi and Peiman Shahbeigi-Roodposhti-Roodposhti, School of Engineering, University of Connecticut, Storrs, CT Alloys with grain size less than 100 nm are known as nanocrystaline alloys. Due to their enhanced physical and mechanical properties, there is an ever-increasing demand to employ them in various industries such as semiconductor, biosensors and aerospace. To improve the processing and application of nanocrystalline alloys, it is necessary to develop close to 100%...
09:35
Dispersion of Nanomaterials in Aqueous Media: Towards Protocol Optimization
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Cited by 71 •
2017
Here, we present a step-wise protocol for the dispersion of nanomaterials in aqueous media with real-time characterization to identify the optimal sonication conditions, intensity, and duration for improved stability and uniformity of nanoparticle dispersions without impacting the sample integrity.
04:55
Testing of Nanoparticle Release from a Composite Containing Nanomaterial Using a Chamber System
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Cited by 4 •
2016
Nanoparticle release is tested using a chamber system that includes a condensation particle counter, an optical particle counter and sampling ports to collect filter samples for microscopy analysis. The proposed chamber system can be effectively used for nanomaterial release testing with a repeatable and consistent data range.
08:33
Functionalization and Dispersion of Carbon Nanomaterials Using an Environmentally Friendly Ultrasonicated Ozonolysis Process
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Cited by 11 •
2017
Here, a novel method for the functionalization and stable dispersion of carbon nanomaterials in aqueous environments is described. Ozone is injected directly into an aqueous dispersion of carbon nanomaterial that is continuously recirculated through a high-powered ultrasonic cell.
11:14
Designing Silk-silk Protein Alloy Materials for Biomedical Applications
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Cited by 2 •
2014
Blending is an efficient approach to generate biomaterials with a broad range of properties and combined features. By predicting the molecular interactions between different natural silk proteins, new silk-silk protein alloy platforms with tunable mechanical resiliency, electrical response, optical transparency, chemical processability, biodegradability, or thermal stability can be designed.
FAQs
Alloying can modify platinum’s electronic structure and lattice strain, which changes how molecules adsorb on the material’s surface. Because adsorption influences interactions between the catalyst and reacting species, these changes can affect reaction activity and selectivity. The choice of the second element therefore provides a way to tune chemical behavior beyond what platinum’s composition alone can offer.
Smaller particles generally expose a greater proportion of atoms at or near the surface relative to their total amount. This high surface-to-volume ratio increases access to reactive sites, making particle size an important design variable for catalytic and sensing behavior. Researchers therefore consider size alongside composition when seeking efficient use of platinum and strong surface reactivity.
Composition determines which alloying effects are introduced, while shape and surface structure influence which atoms and arrangements are exposed to reacting molecules. Together, these variables can change activity, selectivity, durability, and material efficiency. Optimizing them as a combined set is important because improving one property may depend on how the other structural features control accessible reactive sites.
A second element gives researchers additional control over platinum’s electronic structure, lattice strain, stability, and molecular adsorption. This broader tuning range can be used to adjust catalytic or electrochemical behavior rather than relying only on platinum’s inherent properties. The comparison is especially relevant when researchers seek improved activity, selectivity, durability, or reduced platinum requirements.
Optimization centers on controlling alloy composition, particle size, shape, and surface structure. Researchers adjust these features to balance accessible reactive sites with the desired adsorption and stability characteristics. The resulting material can then be evaluated according to activity, selectivity, durability, and material efficiency, allowing structural design to be linked with the performance required for a specific chemical application.
Their tunable surface and electronic properties make platinum alloy nanomaterials useful for catalyzing fuel-cell reactions. Alloying can alter adsorption behavior and related catalytic characteristics, while nanoscale dimensions expose many potentially reactive atoms. Researchers use this combination of effects to pursue catalysts with improved activity, durability, and material efficiency in fuel-cell-related chemical processes.
In electrochemical sensors, the material’s surface interacts with molecules while its composition and structure influence the resulting electrochemical response. Platinum alloying provides a way to tune those interactions through changes in electronic structure, lattice strain, and adsorption. Controlling particle size, shape, and surface structure can therefore support sensor designs with targeted chemical responsiveness.
Chemical studies can compare how composition, size, shape, and surface structure affect activity, selectivity, durability, and material efficiency. These outcomes connect nanoscale design with practical catalytic or sensing performance. Such comparisons help identify which structural features produce the most useful balance of reactivity and stability for fuel-cell reactions, other chemical transformations, or electrochemical detection.