A5014442889- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Advanced Nanomaterials in Catalysis
- Carbon and Quantum Dots Applications
- Graphene and Nanomaterials Applications
- Catalytic Processes in Materials Science
- Supercapacitor Materials and Fabrication
- Water Treatment and Disinfection
- Conducting polymers and applications
- Nanoplatforms for cancer theranostics
- Copper-based nanomaterials and applications
- Ammonia Synthesis and Nitrogen Reduction
- ZnO doping and properties
- Graphene research and applications
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Microbial Fuel Cells and Bioremediation
University of California, Santa Cruz
2019-2023
University of California System
2020
Hydrogel is used as a structural template and precursor to prepare carbon aerogel doped with Fe–Co bimetal sites bifunctional catalysts for ORR OER, which exhibits enhanced activity stability, compared the monometal counterparts.
Design and engineering of bifunctional catalysts are critical in the development electrochemical full water splitting. In this study, 4-ethylphenylacetylene-functionalized iridium (Ir–C≡, 1.7 ± 0.3 nm diameter) nanoparticles found to exhibit markedly enhanced electrocatalytic activity toward both hydrogen oxygen evolution reactions (HER OER) acidic alkaline media, comparison capped with mercapto nitrene derivatives. Remarkably, HER OER performances media even better than those commercial...
This study reports the preparation, characterization, and electrocatalytic properties of palladium-based catalysts containing ceria (CeO2) on carbon black (CB) onion-like (OLC) supports. The electrocatalysts (Pd–CeO2/CB Pd–CeO2/OLC) exhibit a large specific surface area, pore volume, small particle size, as well enhanced interfacial interaction synergy among Pd, CeO2, OLC in Pd–CeO2/OLC that are valuable for improved electrocatalysis. presence CeO2 induces ca. 7% defects modifies electronic...
Metal–nitrogen–carbon (MNC) nanocomposites have been hailed as promising and efficient electrocatalysts toward oxygen reduction reaction (ORR), due to the formation of MNx coordination moieties. However, MNC hybrids are mostly prepared by pyrolysis organic precursors along with select metal salts, where part sites inevitably buried in carbon matrix. This limited accessibility compromises electrocatalytic performance. Herein, we describe a wet-impregnation procedure facile thermal refluxing,...
Abstract Ruthenium has been hailed as a competitive alternative for platinum toward hydrogen evolution reaction (HER), critical process in electrochemical water splitting. In this study, we successfully prepare metallic Ru nanoparticles supported on carbon paper by utilizing novel magnetic induction heating (MIH) method. The samples are obtained within seconds, featuring Cl‐enriched surface that is unattainable via conventional thermal annealing. best sample the series shows remarkable HER...
Metal/carbon nanocomposites have shown great potential as high-performance, low-cost electrocatalysts owing largely to their unique metal-support interactions. These are typically prepared by conventional pyrolysis that is tedious and energy-intensive. Herein, we report the ultrafast preparation of cobalt/carbon magnetic induction heating (MIH) metal organic frameworks within seconds under an inert atmosphere. The resulting samples consist cobalt nanoparticles encapsulated defective carbon...
Rational design and engineering of high-efficiency electrocatalysts toward overall water splitting is crucial for the development hydrogen energy technology. Herein, a facile procedure described preparation effective bifunctional both evolution reaction (HER) oxygen (OER), where ruthenium nanoparticles are supported on graphene nanosheets that codoped with atomic cobalt nitrogen by controlled pyrolysis melamine-functionalized oxide metal ion precursors. The obtained nanocomposites (CoNG/Ru)...
Antibiotic resistance is an imminent threat to human health, requiring the development of effective alternate antibacterial agents. One such alternative includes nanoparticle (photo)catalysts that are good at producing reactive oxygen species (ROS). Herein, we report design and preparation nitrogen-doped carbon dots functionalized with atomically dispersed copper centers by Cu–N coordination (Cu/NCD) exhibit apparent activity toward Gram-negative Escherichia coli (E. coli) under...
Platinum is atomically dispersed within P-doped C 3 N 4 forming Pt–N/P/Cl coordination interactions, and exhibits markedly enhanced electrocatalytic activity towards the hydrogen evolution reaction in acidic media, as compared to P-free counterpart.
The design and engineering of high-performance antimicrobial agents is critical for combating antibiotic resistance. In the present study, a rapid broad-spectrum bactericidal agent developed based on nanocomposites consisting cobalt-doped zinc oxide (CoZnO) nanoparticles MoS2 nanosheets. CoZnO/MoS2 are prepared by facile chemical precipitation method at controlled CoZnO feeds. Scanning transmission electron microscopic measurements show that (ca. 10 nm in diameter) clustered nanosheet...
Design and engineering of graphene-based functional nanomaterials for effective antimicrobial applications has been attracting extensive interest. In the present study, graphene oxide quantum dots (GOQDs) were prepared by chemical exfoliation carbon fibers exhibited apparent activity. Transmission electron microscopic measurements showed that lateral length ranged from a few tens to hundred nanometers. Upon reduction sodium borohydride, whereas UV-vis absorption profile remained largely...
Carbon-supported nanocomposites are attracting particular attention as high-performance, low-cost electrocatalysts for electrochemical water splitting. These mostly prepared by pyrolysis and hydrothermal procedures that time-consuming (from hours to days) typically difficult produce a nonequilibrium phase. Herein, the first time ever, we exploit magnetic induction heating-quenching ultrafast production of carbon-FeNi spinel oxide (within seconds), which exhibit an unprecedentedly high...
Electrochemical hydrogen generation is a rising prospect for future renewable energy storage and conversion. Platinum remains leading choice of catalyst, but because its high cost low natural abundance, it critical to optimize use. In the present study, platinum oxide nanoparticles approximately 2 nm in diameter are deposited on carbon nitride (C3N4) nanosheets by thermal refluxing C3N4 PtCl2 or PtCl4 water. These exhibit apparent electrocatalytic activity toward evolution reaction (HER)...
Oxygen reduction reaction (ORR) plays an important role in dictating the performance of various electrochemical energy technologies. As platinum nanoparticles have served as catalysts choice towards ORR, minimizing cost by diminishing nanoparticle size has become a critical route to advancing technological development. Herein, first-principle calculations show that carbon-supported Pt 9 clusters represent threshold domain size, and ORR activity can be significantly improved doping adjacent...
Metal oxides have been attracting extensive interest in the design and engineering of effective electrocatalysts owing to their unique electronic structure natural abundance. However, limited electrical conductivity sluggish electron-transfer kinetics hampered widespread applications. These issues can be mitigated by structural with incorporation select precious metal species. Herein, iron oxide nanostructures decorated platinum species are prepared facile thermal annealing a MIL-101...
Electrocatalytic synthesis of hydrogen peroxide (H2O2) via two-electron reduction oxygen has emerged as an effective strategy to replace the traditional anthraquinone oxidation route. Herein, copper/carbon nanocomposites are prepared by pyrolytic treatment a metal organic framework precursor, which consists copper oxide (CuOx) nanoparticles dispersed within carbon matrix, evidenced results from transmission electron microscopy and X-ray photoelectron spectroscopy measurements. Deliberate...
Graphene derivatives have been attracting extensive interest as effective antimicrobial agents. In the present study, ternary nanocomposites are prepared based on graphene oxide quantum dots (GOQD), polyaniline (PANI), and manganese oxides. Because of hydrophilic GOQD PANI, resulting GPM readily dispersible in water upon photoirradiation at 365 nm exhibit activity toward both Gram-negative
Copper compounds have been extensively investigated for diverse applications. However, studies of cuprous hydroxide (CuOH) scarce due to structural metastability. Herein, a facile, wet-chemistry procedure is reported the preparation stable CuOH nanostructures via deliberate functionalization with select organic ligands, such as acetylene and mercapto derivatives. The resulting are found exhibit nanoribbon morphology consisting small nanocrystals embedded within largely amorphous...
Dual metal atoms embedded into carbon are emerging electrocatalysts due to synergistic interaction.
Carbon-based nanocomposites have been attracting extensive attention as high-performance catalysts in alkaline media towards the electrochemical reduction of oxygen. Herein, polyacrylonitrile nanoflowers are synthesized via a free-radical polymerization route and used structural scaffold precursor, whereby controlled pyrolysis leads to ready preparation carbon (FeNi-NCF) doped with both metal (Fe Ni) nonmetal (N) elements. Transmission electron microscopy studies show that FeNi-NCF...