Kelong Ao

ORCID: 0000-0003-3685-0915
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About
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Research Areas
  • Advanced battery technologies research
  • Electrocatalysts for Energy Conversion
  • Supercapacitor Materials and Fabrication
  • Advancements in Battery Materials
  • Fuel Cells and Related Materials
  • Advanced Sensor and Energy Harvesting Materials
  • Advanced Photocatalysis Techniques
  • Conducting polymers and applications
  • Catalytic Processes in Materials Science
  • Carbon and Quantum Dots Applications
  • Advanced oxidation water treatment
  • Electrochemical sensors and biosensors
  • Nanocluster Synthesis and Applications
  • Nanomaterials for catalytic reactions
  • Electronic and Structural Properties of Oxides
  • Environmental remediation with nanomaterials
  • Electrochemical Analysis and Applications
  • Catalysis and Oxidation Reactions
  • Covalent Organic Framework Applications
  • Transition Metal Oxide Nanomaterials
  • Carbon dioxide utilization in catalysis
  • Heavy Metal Exposure and Toxicity
  • Nanoparticle-Based Drug Delivery
  • Advanced Nanomaterials in Catalysis
  • Electrospun Nanofibers in Biomedical Applications

Hong Kong Polytechnic University
2025

Southern Medical University
2025

Nanyang Technological University
2023-2024

City University of Hong Kong
2020-2024

Jiangnan University
2016-2019

Molybdenum disulfide has been one of the most studied hydrogen evolution catalyst materials in recent years, but its disadvantages, such as poor conductivity, hinder further development. Here, we employ common hydrothermal method, followed by an additional solvothermal method to construct uncommon molybdenum with two crystal forms 1T and 2H improve catalytic properties. The low overpotential (180 mV) small Tafel slope (88 mV/dec) all indicated that had favorable performance for evolution....

10.3390/nano9060844 article EN cc-by Nanomaterials 2019-06-02

Metal-organic frameworks (MOFs) can act as precursors or templates to a myriad of nanostructured materials that are difficult prepare. In this study, Co-MOF nanorods (NRs) were prepared at room temperature followed by calcination and hydrothermal sulfurization strategy transform the MOF into CoS NRs on carbon cloth (CoS/CC). Intriguingly, resultant 3D sulfide serve scaffolds electrodeposit layered double hydroxides (LDHs) surfaces. Through combining advantages structure composition,...

10.1021/acsami.0c04302 article EN ACS Applied Materials & Interfaces 2020-07-06

The development of cost-effective electrocatalysts for both hydrogen and oxygen evolution reactions (HER OER) in alkaline media is crucial renewable energy conversion technologies. Metal–organic frameworks (MOFs) can act as precursors to the design construct varied nanostructured materials which may be difficult produce other ways. Herein, we put forward a serial ion-exchange reaction selenation strategy prepare novel yolk–shelled Ni–Co–Se dodecahedral nanocages on carbon fiber paper (Y–S...

10.1021/acssuschemeng.8b02343 article EN ACS Sustainable Chemistry & Engineering 2018-07-09

The recent use of cryoprotectant replacement method for solving the easy drying problem hydrogels has attracted increasing research interest. However, conductivity decrease organohydrogels due to induced insulating solvent limited their electronic applications. Herein, we introduce Hofmeister effect and electrostatic interaction generate hydrogen sodium bonds in hydrogel. Combined with its double network, an effective charge channel that will not be affected by replacement, is therefore...

10.1021/acsnano.1c03830 article EN ACS Nano 2021-08-06

Abstract Vanadium redox flow battery (VRFB) promises a route to low‐cost and grid‐scale electricity storage using renewable energy resources. However, the interplay of mass transport activation processes high‐loading catalysts makes it challenging drive high‐performance density VRFB. Herein, surface‐to‐pore interface design that unlocks potential atomic‐Bi‐exposed catalytic surface via decoupling is reported. The functional accommodates electron‐regulated atomic‐Bi catalyst in an asymmetric...

10.1002/adma.202305415 article EN Advanced Materials 2023-08-22

Abstract Transition metal oxide electrocatalysts (TMOEs) are poised to revive grid‐scale all‐vanadium redox flow batteries (VRFBs) due their low‐cost and unique electronic properties, while often inescapably harboring surface vacancies. The role of local vacancy‐induced physicochemical properties on vanadium‐redox electrochemistry (VRE), encompassing kinetics, stability, remains profoundly unveiled. Herein, for the first time, it is revealed that vacancies induce atomic‐scale polarization in...

10.1002/adma.202420510 article EN Advanced Materials 2025-01-29

Herein, we report an eco-friendly and simple fluorescent nitrogen-doped carbon quantum dot (N-CQD) biosensor which was synthesized via a hydrothermal method using erhanediamine (EDA) citric acid (CA) as precursors. The surface functionalization of N-CQDs exhibited bright blue emission under the excitation wavelength 350 nm. obtained were characterized by atomic force microscopy (AFM), Fourier transform infrared spectroscopy, x-ray photoelectron transmission electron microscopy. It found that...

10.1088/1361-6528/aa6320 article EN Nanotechnology 2017-03-22

Constructing active sites with enhanced intrinsic activity and accessibility in a confined microenvironment is critical for simultaneously upgrading the round-trip efficiency lifespan of all-vanadium redox flow battery (VRFB) yet remains under-explored. Here, we present nanointerfacial electric fields (E-fields) featuring outstanding embodied by binary Mo2C-Mo2N sublattice. The asymmetric chemical potential on both sides reconstructed heterogeneous interface imposes charge movement...

10.1021/acsnano.3c07732 article EN ACS Nano 2023-10-20

Palladium nanoparticle-bacterial cellulose (PdBC) hybrid nanofibers were synthesized by in-situ chemical reduction method. The obtained PdBC characterized a series of analytical techniques. results revealed that Pd nanoparticles evenly dispersed on the surfaces BC nanofibers. Then, as-prepared mixed with laccase (Lac) and Nafion to obtain mixture suspension, which was further modified electrode surface construct novel biosensing platform. Finally, prepared electrochemical biosensor employed...

10.3390/molecules21050618 article EN cc-by Molecules 2016-05-11

Rechargeable Zn‐air batteries (ZAB) have drawn extensive attention due to their eco‐friendliness and safety. However, the lack of high‐performance low‐cost oxygen redox reactions (OER ORR) catalysts has become one main stumbling blocks in development. Herein, we successfully fabricate a CoFe nanobubble encapsulated nitrogen‐doped carbon nanocage on wood support (CoFe@NC/WC) via pyrolysis novel Prussian blue analog (PBA)/spruce precursor. The hierarchical CoFe@NC/WC catalyst exhibits an...

10.1002/eem2.12499 article EN cc-by Energy & environment materials 2022-08-18

Integrating layered nanostructured MoS2 with a structurally stable TiO2 backbone to construct reciprocal /TiO2 -based nanocomposites is an effective strategy. C@TiO2 /MoO3 composite nanofibers doped 1T-phase nanograins were fabricated by partially sulfurizing MoOx precursors. By controlling suitable preoxidation temperature before severe thermolysis of polyvinylpyrrolidone (PVP), the precursors formed polymer-embedded array through coordination Mo source and pyrrolidyl groups PVP....

10.1002/cssc.201801784 article EN ChemSusChem 2018-10-06

Fluorescent nitrogen-doped carbon dots (N-CDs) with excellent stability were prepared via single-step hydrothermal carbonization of citric acid (CA) and ethylenediamine (EDA). The as-prepared N-CDs emit blue fluorescence under the excitation 365[Formula: see text]nm have a size distribution 2.80 ± 0.47[Formula: benign effect. structure morphology further characterized by X-ray photoelectron spectroscopy (XPS) Fourier transform infrared (FTIR) spectroscopy. It was found that surface...

10.1142/s1793292018500972 article EN NANO 2018-08-01

Carbon xerogel-zinc oxide (CXZnO) composites were synthesized by a simple method of sol-gel condensation polymerization formaldehyde and resorcinol solution containing zinc salt followed drying thermal treatment. ZnO nanoparticles observed to be evenly dispersed on the surfaces carbon xerogel microspheres. The as-prepared CXZnO mixed with laccase (Lac) Nafion obtain mixture solution, which was further modified an electrode surface construct novel biosensing platform. Finally, prepared...

10.3390/ma9040282 article EN cc-by Materials 2016-04-12

The growing interest in wearable electronics has triggered an enormous demand for flexible/wearable power sources. Flexible batteries, including lithium-ion Sodium-ion and Zinc/Zinc-Air batteries have been developed greatly. Nanofiber nonwoven fabrics form highly porous networks with remarkable interconnectivity between their pores, making them play important role flexible as separators, current collectors, electrodes, etc. It looks that nanofiber are promising to apply thus it is time...

10.1149/1945-7111/acaacc article EN Journal of The Electrochemical Society 2022-12-01

Electrocatalytic CO2 reduction reaction (CO2RR) technology has attracted extensive attention owing to mild conditions at room temperature and pressure, high energy conversion efficiency, facile adaptability. However, it remains a great challenge for the lack of highly active catalysts selectivity products. Herein, we successfully fabricated Bi nanoparticles diffused in nitrogen-doped carbon frame (Bi@NCFs) by an in-situ pyrolysis process. The electrocatalytic test results demonstrate that...

10.2139/ssrn.4358168 article EN 2023-01-01
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