A5009550304- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Advanced battery technologies research
- Characterization and Applications of Magnetic Nanoparticles
- Catalytic Processes in Materials Science
- Nanoparticle-Based Drug Delivery
- Alzheimer's disease research and treatments
- Advanced Photocatalysis Techniques
- Fuel Cells and Related Materials
- Geomagnetism and Paleomagnetism Studies
- Gold and Silver Nanoparticles Synthesis and Applications
- Minerals Flotation and Separation Techniques
- Iron oxide chemistry and applications
- Copper-based nanomaterials and applications
- Nanocluster Synthesis and Applications
- Electrostatics and Colloid Interactions
- Advanced Nanomaterials in Catalysis
- CO2 Reduction Techniques and Catalysts
- Barrier Structure and Function Studies
- Click Chemistry and Applications
- Fluorine in Organic Chemistry
- Biosensors and Analytical Detection
- Graphene and Nanomaterials Applications
- Extracellular vesicles in disease
- Iron Metabolism and Disorders
UNSW Sydney
2018-2024
Australian National University
2024
University of Technology Sydney
2020-2024
Australian Mathematical Sciences Institute
2023
Clinical Research Organization
2020
The direct growth of Pt islands on lattice mismatched Ni nanoparticles is a major synthetic challenge and promising strategy to create highly strained atoms for electrocatalysis. By using very mild reaction conditions, with tunable strain were formed directly branched particles. 1.9 nm Pt-island exhibited high specific activity the highest mass hydrogen evolution (HER) in pH 13 electrolyte. These results show ability synthetically tune size control give higher HER activity.
Driven by the quest for future energy solution, faceted metal nanoparticles are being pursued as next generation electrocatalysts renewable applications. Thanks to recent advancement in solution phase synthesis, different low- and high-index facets on nanocrystals become accessible tested specific electrocatalytic reactions. This minireview summarises key approaches prepare containing most catalytically active platinum group metals (Pt, Pd, Ru, Ir Rh) exposed with using synthesis....
Controlling the formation of nanosized branched nanoparticles with high uniformity is one major challenges in synthesizing nanocatalysts improved activity and stability. Using a cubic-core hexagonal-branch mechanism to form highly monodisperse nanoparticles, we vary length nickel branches. Lengthening branches, their coverage active facets, shown improve for electrocatalytic oxidation 5-hydroxymethylfurfural (HMF), as an example biomass conversion.
Bimetallic nanostructures show exciting potential as materials for effective photothermal hyperthermia therapy. We report the seed-mediated synthesis of palladium-gold (Pd-Au) containing multiple gold nanocrystals on highly branched palladium seeds. The were synthesized via addition a precursor to seed solution in presence oleylamine, which acts both reducing and stabilizing agent. interaction electronic coupling between broadened red-shifted localized surface plasmon resonance absorption...
Achieving stability with highly active Ru nanoparticles for electrocatalysis is a major challenge the oxygen evolution reaction. As improved of catalysts has been shown bulk surfaces low-index facets, there an opportunity to incorporate these stable facets into nanoparticles. Now, new solution synthesis presented in which hexagonal close-packed structured grown on Au form 3D branches. Exposing branches creates reaction kinetics achieve high activity and highest observed nanoparticle...
A major synthetic challenge is to make metal nanoparticles with nanosized branches and well-defined facets for high-performance catalysts. Herein, we introduce a mechanism that uses the growth of hexagonal crystal structured off cubic core nanoparticles. We control form Pd-core Ru-branch have low index Ru facets. demonstrate branched faceted structural features Pd–Ru retain high catalytic activity while also achieving stability oxygen evolution reaction.
Creating high surface area nanocatalysts that contain stacking faults is a promising strategy to improve catalytic activity. Stacking can tune the reactivity of active sites, leading improved performance. The formation branched metal nanoparticles with control fault density synthetically challenging. In this work, we demonstrate varying branch width by altering size seed grows off an effective method precisely in Ni nanoparticles. A across branches was found lower energy barrier for...
Abstract Branched nanoparticles are one of the most promising nanoparticle catalysts as their branch sizes and surfaces can be tuned to enable both high activity stability. Understanding how crystallinity surface facets branched affect catalytic performance is vital for further catalyst development. In this work, a synthesis developed form highly ruthenium (Ru) with control crystallinity. It shown that faceted Ru have improved stability in oxygen evolution reaction (OER) compared...
3D interconnected structures can be made with molecular precision or micrometer size. However, there is no strategy to synthesize dimensions on the scale of tens nanometers, where many unique properties exist. Here, we bridge this gap by building up nanosized gold cores and nickel branches that are directly connected create hierarchical nanostructures. The key approach combining cubic crystal-structured hexagonal in multiple steps. morphology controlled tuning at each synthetic step. These...
Pd–Ru nanoparticles with thin shells and a stable core are shown to improve stability in oxygen evolution reaction catalysis while retaining high activity.
ConspectusBranched metal nanoparticles have unique catalytic properties because of their high surface area with multiple branches arranged in an open 3D structure that can interact reacting species and tailorable branch surfaces maximize the exposure desired catalytically active crystal facets. These exceptional led to exploration roles structural features ranging from number dimensions at larger scales atomic-scale arrangement atoms on precise The fundamental significance how larger-scale...
Nanoparticle tracers with small sizes and large magnetization are critical for biomedical imaging especially magnetic particle (MPI). Small size is important accessing future intracellular neurological in vivo applications Here, we show <15 nm nanoparticles made of zero valent iron cores, oxide shells coated a strongly binding brush co-polymer effective MPI tracers. The nanoparticle cores create hydrodynamic diameter that half the state-of-the-art while maintains similar signal magnitude resolution.
Abstract With freshwater resources becoming increasingly scarce, the photocatalytic seawater splitting for hydrogen production has garnered widespread attention. In this study, a novel photocatalyst consisting of Cu core coated is introduced with N‐doped C and decorated single Co atoms (Co‐NC@Cu) solar to from seawater. This catalyst, without using noble metals or sacrificial agents, demonstrates superior effficiency 9080 µmolg −1 h , i.e., 4.78% solar‐to‐hydrogen conversion efficiency,...
Abstract Achieving stability with highly active Ru nanoparticles for electrocatalysis is a major challenge the oxygen evolution reaction. As improved of catalysts has been shown bulk surfaces low‐index facets, there an opportunity to incorporate these stable facets into nanoparticles. Now, new solution synthesis presented in which hexagonal close‐packed structured grown on Au form 3D branches. Exposing branches creates reaction kinetics achieve high activity and highest observed nanoparticle...
A strategy of direct growth Pt on Ni was used to create and control crystal defects the surface Ni–Pt core–shell nanoparticles. The over types easily achieved by changing surfactant system. In this work, two have been introduced into nanoparticles: polycrystalline shells with multiple grain boundaries step-edge undercoordinated atoms at corners steps. We show that shell has a higher specific activity for oxygen reduction reaction (ORR), while thinner results in per mass stability. Our...
Nanoparticle-based magnetic contrast agents have opened the potential for resonance imaging (MRI) to be used early non-invasive diagnosis of Alzheimer's disease (AD). Accumulation amyloid pathology in brain has shown association with cognitive decline and tauopathy; hence, it is an effective biomarker detection AD. The aim this study was develop a biocompatible nanoparticle targeted beta (Aβ) plaques increase sensitivity T2-weighted MRI We presented novel iron core-iron oxide nanoparticles...
Abstract Die Kontrolle der Bildung von verzweigten Nanopartikeln mit hoher Homogenität ist eine größten Herausforderungen bei Herstellung Nanokatalysatoren verbesserter Aktivität und Stabilität. Mithilfe eines Mechanismus unter Nutzung kubischen Kerns hexagonaler Verzweigung zur hochgradig monodisperser verzweigter Nanopartikel wurde die Länge Nickelverzweigungen variiert. Es hat sich gezeigt, dass Verlängerung Nickelzweige ihrer hohen Bedeckung aktiven Facetten für elektrokatalytische...
Magnetic particle imaging (MPI) has garnered significant attention in biomedical research due to its excellent signal intensity that is generated directly from superparamagnetic iron oxide nanoparticles (SPIONs). Small nanoparticle tracers with high saturation magnetisation are crucial for MPI as they can prolong circulation, crossing the blood brain barrier and enhance cellular uptake. In this work, we demonstrate small zinc doped (Zn-IONPs) tracers. Our Zn-IONPs exhibited over 50%...
Growing Pt on Ag nanoparticles is a promising approach to forming catalysts that present active sites with both and available improve the activity for hydrogen evolution reaction (HER). By carefully controlling concentration of precursor, amount Pt-decorated particles onto could be controlled grow islands between 0.6 1.5 nm. As result, relative amounts Ag–Pt tuned. The smallest, nm nanoparticle, highest ratio Pt–Pt was found have an accelerated Volmer step. DFT modeling showed improved...