A5018817980- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Quantum Dots Synthesis And Properties
- Spectroscopy and Quantum Chemical Studies
- Molecular Junctions and Nanostructures
- Organic Light-Emitting Diodes Research
- Covalent Organic Framework Applications
- Radical Photochemical Reactions
- Porphyrin and Phthalocyanine Chemistry
- Chalcogenide Semiconductor Thin Films
- Molecular Sensors and Ion Detection
- Luminescence and Fluorescent Materials
- Supercapacitor Materials and Fabrication
- Fuel Cells and Related Materials
- Catalytic C–H Functionalization Methods
- Electronic and Structural Properties of Oxides
- Ga2O3 and related materials
- Electrocatalysts for Energy Conversion
- Gold and Silver Nanoparticles Synthesis and Applications
- Renal function and acid-base balance
- Organometallic Complex Synthesis and Catalysis
Emory University
2022-2025
Southern University of Science and Technology
2018-2023
Efficient and stable photoelectrochemical reduction of CO2 into highly reduced liquid fuels remains a formidable challenge, which requires an innovative semiconductor/catalyst interface to tackle. In this study, we introduce strategy involving the fabrication silicon micropillar array structure coated with superhydrophobic fluorinated carbon layer for conversion methanol. The pillars increase electrode surface area, improve catalyst loading adhesion without compromising light absorption,...
We report a ternary hybrid photocatalyst architecture with tailored interfaces that boost the utilization of solar energy for photochemical CO2 reduction by synergizing electron and heat flows in photocatalyst. The comprises cobalt phthalocyanine (CoPc) molecules assembled on multiwalled carbon nanotubes (CNTs) are decorated nearly monodispersed cadmium sulfide quantum dots (CdS QDs). CdS QDs absorb visible light generate electron-hole pairs. CNTs rapidly transfer photogenerated electrons...
While redox polymer-mediated catalysis at silicon photoelectrodes has been studied since the 1980s, there have few detailed studies of these materials in photoelectrochemical CO2 reduction. Here, we develop functionalized with a viologen-based polymer that mediates formation catalytic gold nanoparticles. The presence was confirmed by X-ray photoelectron spectroscopy (XPS), and nanoparticles were imaged high-angle annular dark field scanning transmission electron microscopy (HAADF-STEM). We...
Pallas's shine: extended intercationic Pd⋯Pd contacts of 3.30 Å show distinct MMLCT transitions and low-energy emissions.
Photoelectrodes consisting of metal–insulator–semiconductor (MIS) junctions are a promising candidate architecture for water splitting and the CO2 reduction reaction (CO2RR). The photovoltage is an essential indicator driving force that photoelectrode can provide surface catalytic reactions. However, MIS photoelectrodes contain metal nanoparticles, direct measurements at sites under operational conditions remain challenging. Herein, we report new in situ spectroscopic approach to probe...
Photoelectrochemical solar fuel generation at the semiconductor/liquid interface consists of multiple elementary steps, including charge separation, recombination, and catalytic reactions. While overall incident light-to-current conversion efficiency (IPCE) can be readily measured, identifying microscopic loss processes remains difficult. Here, we report simultaneous in situ transient photocurrent reflectance spectroscopy (TRS) measurements titanium dioxide-protected gallium phosphide...
For many slow solar-fuel-forming reactions, the accumulation of photogenerated minority carriers on photoelectrode surface leads to light-induced band edge unpinning, affecting junction properties by decreasing bending in semiconductor space charge layer and increasing driving force reactions electric double layer. In this study, we demonstrate a contactless operando field-induced second harmonic generation (EFISH) method for measuring change (δΔΦSCRL) photoelectrodes upon photoexcitation....
Making Pd(<sc>ii</sc>) brightly shining: mononuclear analogues are non-emissive, but folded dinuclear palladium(<sc>ii</sc>) diacetylide complexes phosphoresce from MMLCT excited states with quantum yields up to 48%.
Phosphorescent cationic tridentate C^N^N (HC^N^N = 6-(2-R2,4-R1-phenyl)-2,2'-bipyridine; R1 R2 H or F, OMe, H) cyclometallated Pd(II) complexes with an N,N-dimethyl-imidazol-allenylidene ancillary ligand (L) and their corresponding Pt(II) congeners have been synthesized characterized, following the previously reported preparation of complex [Pd(6-phenyl-2,2'-bipyridine)L]+. For these Pd(II)/Pt(II) 2,3,4-tris(dodecyloxy)benzenesulfonate (LA-) counter-anions in mixed CH2Cl2/toluene solvents,...
Hybrid (photo-) cathodes consisted of conjugated polymer and hydrogen evolution reaction (HER) co-catalysts are an emerging platform for low-cost solar fuels generation. The electron-accepting Poly{[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′bithiophene)}, known as P(NDI2OD-T2) or N2200, is a promising material to serve cathode the electron acceptor bulk heterojunction photocathodes. Unlike inorganic semiconductor/metal junctions, much less about...
In photoelectrochemical cells, promising devices for directly converting solar energy into storable chemical fuels, the spatial variation of electrostatic potential across semiconductor–electrolyte junction is key parameter that determines cell performance. principle, electric field induced second harmonic generation (EFISH) provides a contactless in situ spectroscopic tool to measure potential. However, total (SHG) signal contains contributions EFISH signals semiconductor space charge layer...
Abstract We report a ternary hybrid photocatalyst architecture with tailored interfaces that boost the utilization of solar energy for photochemical CO 2 reduction by synergizing electron and heat flows in photocatalyst. The comprises cobalt phthalocyanine (CoPc) molecules assembled on multiwalled carbon nanotubes (CNTs) are decorated nearly monodispersed cadmium sulfide quantum dots (CdS QDs). CdS QDs absorb visible light generate electron‐hole pairs. CNTs rapidly transfer photogenerated...
The demand for reform in energy production and reduction carbon dioxide emission lays emphasis on the development mechanistic study of photocatalytic water splitting photoelectrodes. Understanding bottlenecks photoelectrochemical (PEC) conversion efficiency systems is essential to impart guidance material selection photoelectrode design. Absorbed photon-to-current (APCE), which represents fraction absorbed photons converted into electrons photocurrents, key metric evaluation PEC performance....
The water oxidation reaction is considered as the bottleneck and rate-determining step in photoelectrochemical water-splitting processes. To achieve efficient on photoanode, sufficient built-in potential semiconductors under light illumination needs to be maintained. Herein, we introduced in-situ Electric Field Induced Second Harmonic Generation (EFISH) technique probe change of process a single-crystal rutile TiO 2 photoanode. Under dark condition, parabolic relation between second harmonic...