A5013588765- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- TiO2 Photocatalysis and Solar Cells
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Photonic and Optical Devices
- Conducting polymers and applications
- Transition Metal Oxide Nanomaterials
- Copper-based nanomaterials and applications
- Quantum Dots Synthesis And Properties
- Machine Learning in Materials Science
- Liquid Crystal Research Advancements
- Photonic Crystals and Applications
- Advancements in Solid Oxide Fuel Cells
- ZnO doping and properties
- Graphene research and applications
- Gas Sensing Nanomaterials and Sensors
- Gold and Silver Nanoparticles Synthesis and Applications
- Aerogels and thermal insulation
- Molecular Junctions and Nanostructures
- Surface Chemistry and Catalysis
Institute of Coal Chemistry
2021-2025
Chinese PLA General Hospital
2024-2025
Soochow University
2024
Los Alamos National Laboratory
2016-2023
Singapore Polytechnic
2011-2022
Hohai University
2020-2021
Dongguan University of Technology
2019
University of Illinois Urbana-Champaign
2012-2018
Shanghai Jiao Tong University
2013-2015
Urbana University
2013-2015
This paper presents the use of Ca2Mn2O5 as an oxygen-deficient perovskite electrocatalyst for oxygen evolution reaction (OER) in alkaline media. Phase-pure was made under mild temperatures through a reductive annealing method. deficient can catalyze generation at ~1.50 V versus (vs) reversible hydrogen electrode (RHE) electrochemically, and reach OER mass activity 30.1 A/g 1.70 (vs RHE). In comparison to CaMnO3, shows higher activities. The molecular level vacancies high spin electron...
Development of acid-stable electrocatalysts with low overpotential for oxygen evolution reaction (OER) is a major challenge to produce hydrogen directly from water. We report in this paper pyrochlore yttrium ruthenate (Y2Ru2O7-δ) electrocatalyst that has significantly enhanced performance toward OER acid media over the best-known catalysts, an onset 190 mV and high stability 0.1 M perchloric solution. X-ray absorption near-edge structure (XANES) indicates Y2Ru2O7-δ had valence state favors...
This study investigated the applicability of maghemite ( γ -Fe 2 O 3 ) nanoparticles for selective removal toxic heavy metals from electroplating wastewater. The 60 nm were synthesized using a coprecipitation method and characterized by X-ray diffraction (XRD) scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDX). Batch experiments carried out Pb 2+ ions aqueous solutions nanoparticles. effects contact time, initial concentration ions, solution pH, salinity on...
Non-platinum group metal (non-PGM) electrocatalysts for the oxygen reduction reaction (ORR) are generally composed of iron, nitrogen, and carbon synthesized through high-temperature pyrolysis. Among various types precursors, metal-organic frameworks (MOFs), zeolitic imidazolate framework (ZIF)-8 in particular, have often been used synthesis. The pyrolysis ZIF-8 precursor relies on use Zn as a sacrificial (SM), optimal processing temperatures exceed 1000 °C to generate active non-PGM...
This paper describes the synthesis, formation mechanism, and mechanical property of multilayered ultrathin Pd nanosheets. An anisotropic, Hanoi Tower-like assembly nanosheets was identified by transmission electron microscopy atomic force (AFM). These may contain layers, down to single unit cell thickness. Selected area diffraction scanning data show interconnected atomically thick layers stacking vertically with rotational mismatches, resulting in unique diffractions Moiré patterns. Density...
In this paper, we propose and demonstrate an all-optical second-order differentiator based on a two-stage self-coupled optical waveguide silicon-on-insulator platform. The transmission spectrum of the fabricated device has parabola-like filtering notch with 3-dB bandwidth up to ~ 100 GHz depth 12 dB. Experiments are carried out for 10-, 20-, 40-Gb/s time-domain multiplexing (OTDM) picosecond pulse trains, differentiations achieved using device.
Stimuli-responsive polymeric micelles (PMs) have shown great potential in drug delivery and controlled release cancer chemotherapy. Herein, inspired by the features of tumor microenvironment, we developed dual pH/redox-responsive mixed PMs which are self-assembled from two kinds amphiphilic diblock copolymers (poly(ethylene glycol) methyl ether-b-poly(β-amino esters) (mPEG-b-PAE) poly(ethylene ether-grafted disulfide-poly(β-amino (PAE-ss-mPEG)) for anticancer release. The co-micellization is...
A key challenge for fuel cells based on phosphoric acid doped polybenzimidazole membranes is the high Pt loading, which required due to low electrode performance owing poor mass transport and severe poisoning via absorption surface. Herein, these issues are well addressed by design synthesis of effective catalyst binders polymers intrinsic microporosity (PIMs) with strong hydrogen-bonding functionalities improve binding energy, thus preferably uphold in vicinity particles mitigate adsorption...
Understanding the complex solvent effects on microstructures of ink and catalyst layer (CL) is crucial for development high-performance anion exchange membrane fuel cells (AEMFCs). Herein, we study within binary system composed water, isopropyl alcohol (IPA), commercial ionomer, Pt/C catalyst. The results show that particles ionomer tend to form large aggregates wrapped with a thick in IPA-rich promote formation mesopores CL. With increase water content ink, are more likely bridge each other...
Two-dimensional (2D) materials often show a range of intriguing electronic, catalytic, and optical properties that differ greatly from conventional nanoparticles. While planar configuration is desirable, applications such as catalysis sensing benefit the accessibility to large surface areas. The 2D generally tend form stacks in order reduce overall energy. Such densely packed structures however are detrimental when access high area required. Herewith we demonstrate chemical strategy generate...
Platinum group metal-free (PGM-free) catalysts, based on earth-abundant elements such as carbon, nitrogen, and transition metals, have shown promising oxygen reduction reaction (ORR) activity in fuel cells. Intensive research activities focused the improvement of understanding active sites PGM-free catalysts. However, durability catalysts cell cathode under realistic operating conditions has been addressed to a much lesser degree than initial ORR activity, with only qualitative degradation...
Well-defined metal nanocrystals play important roles in various fields, such as catalysis, medicine, and nanotechnology. They are often synthesized through kinetically controlled process colloidal systems that contain precursors surfactant molecules. The chemical functionality of surfactants coordinating ligands to ions however remains a largely unsolved problem this process. Understanding the metal-ligand complexation its effect on formation kinetics at molecular level is challenging but...
Abstract Composite polymeric scaffolds from alginate and single‐walled carbon nanotube (SWCNT) were produced using a freeform fabrication technique. The characterized for their structural, mechanical, biological properties by scanning electron microscopy, Raman spectroscopy, tensile testing, cell–scaffold interaction study. Three‐dimensional hybrid alginate/SWCNT tissue fabricated in multinozzle biopolymer deposition system, which makes possible to disperse align SWCNTs the matrix. structure...
Herein, a sulfonated ionomer with intrinsic microporosity was designed as catalyst binder in low-Pt-loaded fuel cell to construct good triple-phase boundary, achieving an obvious 57% reduction of local oxygen-transport resistance and notable 47% increase peak power density up 1233 mW cm-2.
Nitrogen-coordinated metal sites (MN x ) in metal- and nitrogen-codoped carbon (M-N-C) catalysts offer promising electrocatalytic activity, but selective synthetic design of MN with specific coordination environments remains challenging. Here, we manipulate the formation statistics by using sacrifice alkali metals (AM = Li, Na, K) to form vacancy-N (AM-MVN -C) templates, which are used direct solution-phase CoN 4 Co-N-C catalysts. We build a probability weight function based on embedding...
Abstract The stability of electrocatalysts in acidic solutions containing H2O2 is crucial for the large-scale application innovative electrochemical devices utilizing electrocatalytic reactions energy conversion and storage. Herein, we investigate Pt/C catalysts oxidation reaction (HPOR), examining evolution their structure properties. During testing, found that exhibit great activity retention despite a loss active area (ECA) caused by particle coarsening. increase Pt size attributed to...
We present the molecular coordination inheritance strategy for synthesizing 2e-ORR SACs with well-defined environments and reveal formation mechanism of active sites. The Co–N 2 O catalyst shows highest selectivity.
We propose and experimentally demonstrate a microfiber-graphene device. Owing to the interaction between graphene film evanescent field leaked from microfiber, hybrid photoconductive device exhibits high photoresponse. A maximum photocurrent responsivity of ~2.81 mA/W is achieved in telecommunication band. nearly flat photoresponse spectrum within broad operational band ranging 1500 nm 1600 also obtained as consequence dispersionless absorption graphene. These results show that proposed...