A5067192957- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- Ga2O3 and related materials
- ZnO doping and properties
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Copper-based nanomaterials and applications
- Electrochemical Analysis and Applications
- Fullerene Chemistry and Applications
- Carbon and Quantum Dots Applications
- Iron oxide chemistry and applications
- 2D Materials and Applications
- Advanced oxidation water treatment
- Ammonia Synthesis and Nitrogen Reduction
- Hydrogen Storage and Materials
- MXene and MAX Phase Materials
- Nanoparticles: synthesis and applications
- Dielectric properties of ceramics
- Catalytic Processes in Materials Science
- Electronic and Structural Properties of Oxides
- Nanocluster Synthesis and Applications
- Advancements in Battery Materials
- Gas Sensing Nanomaterials and Sensors
- Molecular Junctions and Nanostructures
- Nanomaterials for catalytic reactions
The University of Texas at El Paso
2019-2023
Centre for Nano and Soft Matter Sciences
2018
Fullerene-based low-dimensional (LD) heterostructures have emerged as excellent energy conversion materials. We constructed van der Waals 1T-MoS2/C60 0D-2D via a one-pot synthetic approach for catalytic hydrogen generation. The interfacial 1T-MoS2–C60 and C60–C60 interactions well their electrocatalytic properties were finely controlled by varying the weight percentages of fullerenes. 1T-MoS2 platforms provided novel template formation C60 nanosheets (NSs) within very narrow fullerene...
This work for the first time unfurls fundamental mechanisms and sets stage an approach to derive electrocatalytic activity, which is otherwise not possible, in a traditionally known wide band-gap oxide material. Specifically, we report on tunable optical properties, terms of spectral selectivity red-shifted band gap, behavior iron (Fe)-doped gallium (β-Ga2O3) model system. X-ray diffraction (XRD) studies sintered Ga2-x Fe x O3 (GFO) (0.0 ≤ 0.3) compounds provide evidence Fe3+ substitution at...
Electron spin polarization is identified as a promising avenue for enhancing the oxygen evolution reaction (OER), which bottleneck that limits energy efficiency of water-splitting. Here, we report both ferrimagnetic (f-Fe3O4) and superparamagnetic iron oxide (s-Fe3O4) catalysts can exhibit external magnetic field (Hext)-induced OER enhancement, activity proportional to their intrinsic moment. Additionally, chirality-induced selectivity (CISS) effect was utilized in synergy with Hext get...
Fluorescent graphene quantum dots (GQDs) prepared from low-cost and sustainable precursors are highly desirable for various applications, including luminescence-based sensing, optoelectronics, bioimaging. Among different natural precursors, the unique structural compositional variety abundance of aromatic carbon in lignin make it a renewable precursor green synthesis advanced carbon-based materials GQDs. However, inferior photoluminescence yield GQDs lignin, limits their practical utility....
A new isolation protocol was recently reported for highly purified metallic Fullertubes D5h -C90 , D3d -C96 and D5d -C100, which exhibit unique electronic features. Here, we report the oxygen reduction electrocatalytic behavior of C60 C70 (spheroidal fullerenes), C90 C96 C100 (tubular fullerenes) using a combination experimental theoretical approaches. (a metal-free catalyst) displayed remarkable reaction (ORR) activity, with an onset potential 0.85 V halfway 0.75 V, are close to...
Tailoring the optical and electronic properties of wide band gap β-Ga2O3 has been tremendous importance to utilize full potential material in current emerging technological applications electronics, optics, optoelectronics. In present work, we report effect Ti-dopant insolubility driven chemical inhomogeneity on structural, morphological, bonding, structure, red shift characteristics Ga2O3 polycrystalline compounds. Ga2–2xTixO3 (GTO; 0 ≤ x 0.20) compounds were synthesized using a...
We report the structural chemistry and optical properties of tin (Sn)-mixed gallium oxide (Ga2O3) compounds, where interfacial phase modulation-induced distortion in turn induces variations band gap nonlinear activity. The Sn incorporation into Ga2O3 causes significant reduction activity upon chemical composition tuning. Detailed investigation performed on chemistry, stabilization, surface morphology, electrochemical Sn-mixed compounds (Ga2–2xSnxO3, 0.00 ≤ x 0.3, Ga-Sn-O) indicates that...
Abstract In situ growth of metallic MoO 2 films on fluorine‐doped tin oxide (FTO) and powder in solution was achieved simultaneously by a simple hydrothermal process employing citric acid as the surfactant. The mechanism nanostructures (NSs) at heterogeneous interface homogeneous medium proceeds different manner which seeds grow preferred orientation FTO, whereas they propagate all directions solution. high lattice matching FTO favours film could not be obtained other conventional...
Ba(Fe0.7Ta0.3)O3-δ (BFTO) compounds were synthesized using a conventional, high-temperature solid-state ceramic reaction method by varying the sintering temperature (Ts = 1200–1350 °C). The crystal structure, electronic and electrocatalytic activity of BFTO evaluated. processing induced phase transformations structural quality influences structure compounds. At Ts 1200 °C, Ba(Fe0.7Ta0.3)O3−δ stabilizes as mixture orthorhombic + rhombohedral (Amm2 R3m). With increasing (≥1250 °C), ceramics...
The enhanced safety, superior energy, and power density of rechargeable metal-air batteries make them ideal energy storage systems for application in grids electric vehicles. However, the absence a cost-effective stable bifunctional catalyst that can replace expensive platinum (Pt)-based to promote oxygen reduction reaction (ORR) evolution (OER) at air cathode hinders their broader adaptation. Here, it is demonstrated Tin (Sn) doped β-gallium oxide (β-Ga2 O3 ) bulk form efficiently catalyze...
Abstract Overcoming slow kinetics and high overpotential in electrocatalytic oxygen evolution reaction (OER) requires innovative catalysts approaches that transcend the scaling relationship between binding energies for intermediates catalyst surfaces. Inorganic complexes provide unique, customizable geometries, which can help enhance their efficiencies. However, they are unstable susceptible to chemical under extreme pH conditions. Immobilizing on substrates creates single‐molecule (SMCs)...
Tailoring the curvature-directed lattice strain in GNRs along with optimal surface anchoring of molybdenum disulfide (MoS2) quantum dots (QDs) can lead to a unique heterostructure Pt-like HER activity (onset potential -60 mV). The curvature-induced electronic charge redistribution at curved region graphene nanoribbons allows facile GNR-MoS2 interfacial transfer heterostructure, making sulfur (S) more active towards HER. density functional theory (DFT) calculations confirmed electronically...
Overcoming slow kinetics and high overpotential in electrocatalytic oxygen evolution reaction (OER) requires innovative catalysts approaches that transcend the scaling relationship between binding energies for intermediates catalyst surfaces. Inorganic complexes provide unique designs with customizable geometries, which can help enhance their efficiencies. However, they are unstable susceptible to oxidation under extreme pH conditions. Immobilizing on substrates creates single-molecule...
Abstract A new isolation protocol was recently reported for highly purified metallic Fullertubes D 5h ‐C 90 , 3d 96 and 5d 100, which exhibit unique electronic features. Here, we report the oxygen reduction electrocatalytic behavior of C 60 70 (spheroidal fullerenes), 100 (tubular fullerenes) using a combination experimental theoretical approaches. (a metal‐free catalyst) displayed remarkable reaction (ORR) activity, with an onset potential 0.85 V halfway 0.75 V, are close to...
Electron spin polarization is identified as a promising avenue for enhancing the oxygen evolution reaction (OER), bottleneck that limits energy efficiency of water-splitting. Here, we report both ferrimagnetic (f-Fe3O4) and superparamagnetic iron oxide (s-Fe3O4) catalysts can exhibit external magnetic field (Hext) induced OER enhancement, activity proportional to their intrinsic moment. Additionally, chirality selectivity (CISS) effect was utilized in synergy with Hext get maximum...
Spin-Selective Single Molecule Catalysts In article number 2302170, Sreeprasad T. Sreenivasan and co-workers show how in-situ geometric changes in single molecule catalysts enhance electrocatalytic activity under a magnetic field. Surpassing established benchmarks, this innovative approach to spin-polarized oxygen evolution reaction opens exciting new avenues for magnetically activated single-molecule catalysts.