A5020824627- Electrocatalysts for Energy Conversion
- Machine Learning in Materials Science
- Catalytic Processes in Materials Science
- Concrete and Cement Materials Research
- CO2 Reduction Techniques and Catalysts
- Innovative concrete reinforcement materials
- Vibration and Dynamic Analysis
- Ionic liquids properties and applications
- Fuel Cells and Related Materials
- Catalysis and Hydrodesulfurization Studies
- Fire effects on concrete materials
- Random Matrices and Applications
- Civil and Geotechnical Engineering Research
- Energy and Environment Impacts
- Masonry and Concrete Structural Analysis
- Soil, Finite Element Methods
- Structural Health Monitoring Techniques
- Geophysics and Gravity Measurements
- nanoparticles nucleation surface interactions
- Advanced battery technologies research
- Structural Engineering and Vibration Analysis
- Theoretical and Computational Physics
- Geotechnical Engineering and Analysis
- Photovoltaic Systems and Sustainability
- Radio Astronomy Observations and Technology
Zhejiang University
2022-2025
Xinjiang Astronomical Observatory
2022-2024
Chinese Academy of Sciences
2013-2024
Ministry of Water Resources of the People's Republic of China
2024
China Institute of Water Resources and Hydropower Research
2021-2024
Beijing University of Technology
2023-2024
Johns Hopkins University
2015-2022
Northeastern University
2019-2020
Guangzhou Design Institute
2019
Guangdong University of Technology
2017
Bimetallic platinum-nickel (Pt-Ni) nanostructures represent an emerging class of electrocatalysts for oxygen reduction reaction (ORR) in fuel cells, but practical applications have been limited by catalytic activity and durability. We surface-doped Pt3Ni octahedra supported on carbon with transition metals, termed M-Pt3Ni/C, where M is vanadium, chromium, manganese, iron, cobalt, molybdenum (Mo), tungsten, or rhenium. The Mo-Pt3Ni/C showed the best ORR performance, a specific 10.3 mA/cm(2)...
Alloying is an important strategy for the design of catalytic materials beyond pure metals. The conventional alloy catalysts however lack precise control over local atomic structures active sites. Here we report on investigation active-site ensemble effect in bimetallic Pd-Au electrocatalysts CO2 reduction. A series Pd@Au are synthesized by decorating Au nanoparticles with Pd controlled doses, giving rise to surfaces containing ensembles various sizes. Their activity electroreduction CO...
Doping with a transition metal was recently shown to greatly boost the activity and durability of PtNi/C octahedral nanoparticles (NPs) for oxygen reduction reaction (ORR), but its specific roles remain unclear. By combining electrochemistry, ex situ in spectroscopic techniques, density functional theory calculations, newly developed kinetic Monte Carlo model, we showed that Mo atoms are preferentially located on vertex edge sites Mo–PtNi/C form oxides, which stable within wide potential...
Electrochemical reduction of carbon dioxide into ethylene, as opposed to traditional industrial methods, represents a more environmentally friendly and promising technical approach. However, achieving high activity ethylene remains huge challenge due the numerous possible reaction pathways. Here, we construct hierarchical nanoelectrode composed CuO treated with dodecanethiol achieve elevated Faradaic efficiency reaching 79.5%. Through on in situ investigations, it is observed that...
We report on Cu nanowires as highly active and selective catalysts for electroreduction of CO at low overpotentials. The were synthesized by reducing pregrown CuO nanowires, with the surface structures tailored tuning reduction conditions improved catalytic performance. optimized achieved 65% faradaic efficiency (FE) 50% FE toward production ethanol potentials more positive than −0.5 V (versus reversible hydrogen electrode, RHE). Structural analyses computational simulations suggest that...
We present a study of the luminosity density distribution Galactic bar using number counts red clump giants (RCGs) from OGLE-III survey. The data were recently published by Nataf et al. (2013) for 9019 fields towards bulge and have $2.94\times 10^6$ RC stars over viewing area $90.25 \,\textrm{deg}^2$. include counts, mean distance modulus ($\mu$), dispersion in $\mu$ full error matrix, which we fit with several tri-axial parametric models. use Markov Chain Monte Carlo (MCMC) method to...
Recent developments of copper (Cu)-based nanomaterials have enabled the electroreduction CO2 at low overpotentials. The mechanism low-overpotential reduction on these nanocatalysts, however, largely remains elusive. We report here a systematic investigation highly dense Cu nanowires, with focus placed understanding surface structure effects formation *CO (* denotes an adsorption site catalyst surface) and evolution gas-phase CO product (CO(g)) overpotentials (more positive than −0.5 V)....
Electroreduction of carbon monoxide (CO) possesses great potential for achieving the renewable synthesis hydrocarbon chemicals from CO2. We report here selective reduction CO to acetate using Cu–Pd bimetallic electrocatalysts. High activity and selectivity are demonstrated CO-to-acetate conversion with >200 mA/cm2 in geometric current density >65% Faradaic efficiency (FE). An asymmetrical C–C coupling mechanism is proposed explain composition-dependent catalytic performance high toward...
Platinum (Pt) has been documented as the top-tier fuel cell catalyst, yet it faces a notable challenge regarding its poor CO tolerance and sluggish oxygen reduction reaction (ORR) in proton exchange membrane cells (PEMFCs), particularly when using CO-contaminated blue gray H 2 . Here, we present an interfacial metal coordination strategy to design bifunctional platinum-cobalt (PtCo) intermetallic catalyst integrated with tin-nitrogen-carbon (Sn–N–C) support, which forms Pt–Sn–N bonds that...
This paper presents comparative thermal and mechanical performance of geopolymers derived from metakaolin (MK), fly ash (FA), their combinations. Bending compression tests, thermogravimetric analysis, scanning electron microscopy energy dispersive spectrum, mercury intrusion porosimetry, dilatometric tests were conducted on three types (MK, MK-FA, FA based) to evaluate properties, behavior, microstructure. Results these show that MK-based experience significant shrinkage, high mass loss,...
This paper presents the development of fiber reinforced metakaolin-fly ash based geopolymers for fire resistance application. A series experiments are carried out to develop optimum mix proportions with superior properties. Bending and compression tests were conducted at ambient temperature after exposure elevated temperatures on different proportion carbon fly substitution metakaolin, effect content quantified. Data from showed that addition chopped fibers in provides effective crack...
Pt-Ni nanoparticles are promising catalysts for the oxygen reduction reaction but they suffer from Ni dissolution in oxidizing conditions. It has recently been shown that it is possible to stabilize octahedral by doping them with a small amount of Mo. Using ab initio calculations and quaternary cluster expansion, we provide atomic-scale explanations enhanced stability Mo-doped nanoparticles. We predict Pt3Ni only Mo (around 1.6% mole fraction) equilibrium concentration atoms on particle...
The construction of cluster expansions parametrized by first-principles calculations is a powerful tool for calculating properties materials. In this Perspective, we discuss the application to surfaces and nanomaterials. We review fundamentals expansion formalism how machine learning used improve predictive accuracy expansions. highlight several representative applications nanomaterials, demonstrating help researchers build structure–property relationships enable rational design accelerate...
Electroreduction of CO2 is a promising approach toward artificial carbon recycling. The rate and product selectivity this reaction are highly sensitive to the surface structures electrocatalysts. We report here 4H Au nanostructures as advanced electrocatalysts for active selective reduction CO. nanoribbons in pure phase, nanorods hybrid 4H/fcc those fcc phase comparatively studied electroreduction CO2. Both activity CO production were found exhibit trend 4H-nanoribbons > 4H/fcc-nanorods...
To enable rational design of alloy nanoparticle catalysts, we develop an approach to generate catalytic activity maps nanoparticles on a grid particle size and composition. The are created by using quaternary cluster expansion explicitly predict adsorbate binding energies varying shape, size, atomic order while accounting for interactions among the adsorbates. This is used in kinetic Monte Carlo simulations activated structures turnover frequencies all surface sites. We demonstrate our Pt-Ni...
A cluster expansion approach has been used to investigate the relationship between surface structures of Pt3Ni alloy catalysts and their catalytic activity. With help this approach, we have constructed a direct bridge atomic structure properties Pt–Ni at variety compositions chemical environments. We predict that Pt3Ni(111) surfaces substantial subsurface disorder, as result, ORR activity different sites varies by approximately 3 orders magnitude. Using model, identify with multilayer Pt...
Abstract Induction of autophagy is a common response cells upon exposure to nanomaterials and represents both safety concern an application niche for engineered nanomaterials. Herein, it reported that the magnetic property autophagy‐inducing activity Ni–Co alloy nanocrystal (NC) assemblies can be differentially “tuned” through altering material composition. A series NC assemblies, composed nanoparticles (NPs) with size about 30 nm, quickly synthesized under microwave irradiation in aqueous...
Abstract Defects can introduce atomic structural modulation and tailor performance of materials. Herein, it demonstrates that semiconductor WO 3 with inert electrocatalytic behavior be activated through defect‐induced tensile strains. Structural characterizations reveal when simply treated in Ar/H 2 atmosphere, oxygen vacancies will generate cause defective structures. Stacking faults are found defects, thus modulating electronic structure transforming electrocatalytic‐inert into highly...