A5019381433- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- Advanced battery technologies research
- Advanced Memory and Neural Computing
- Electrochemical Analysis and Applications
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- TiO2 Photocatalysis and Solar Cells
- Supercapacitor Materials and Fabrication
- Ferroelectric and Negative Capacitance Devices
- Gas Sensing Nanomaterials and Sensors
- Advanced Nanomaterials in Catalysis
- Catalytic Processes in Materials Science
- Electrochemical sensors and biosensors
- Chemical Looping and Thermochemical Processes
- Transition Metal Oxide Nanomaterials
- Chalcogenide Semiconductor Thin Films
- Fuel Cells and Related Materials
- Nanomaterials for catalytic reactions
- Advancements in Solid Oxide Fuel Cells
- Graphene research and applications
- Quantum Dots Synthesis And Properties
- Perovskite Materials and Applications
- Copper-based nanomaterials and applications
Griffith University
2015-2024
Virginia Tech
2016-2023
Bangladesh Atomic Energy Commission
2023
Gold Coast Health
2016-2021
Institute of Solid State Physics
2021
Chinese Academy of Sciences
2021
Shahjalal University of Science and Technology
2013
Korea National University of Transportation
2012-2013
University of Dhaka
2012
Water-alkaline electrolysis holds a great promise for industry-scale hydrogen production but is hindered by the lack of enabling evolution reaction electrocatalysts to operate at ampere-level current densities under low overpotentials. Here, we report use spillover-bridged water dissociation/hydrogen formation processes occurring synergistically hybridized Ni3S2/Cr2S3 sites incapacitate inhibition effect high-current-density-induced high coverage dissociation site and concurrently promote...
Abstract The poor cycling stability resulting from the large volume expansion caused by lithiation is a critical issue for Si‐based anodes. Herein, we report first time of new yolk–shell structured high tap density composite made carbon‐coated rigid SiO 2 outer shell to confine multiple Si NPs (yolks) and carbon nanotubes (CNTs) with embedded Fe O 3 nanoparticles (NPs). achieved superior conductivity can be attributed efficiently utilised inner void containing yolks, NPs, CNTs Li + storage...
Abstract Electronic structure engineering lies at the heart of efficient catalyst design. Most previous studies, however, utilize only one technique to modulate electronic structure, and therefore optimal states are hard be achieved. In this work, we incorporate both Fe dopants Co vacancies into atomically thin CoSe 2 nanobelts for /coxygen evolution catalysis, resulted -D –V exhibits much higher catalytic activity than other defect-activated previously reported FeCo compounds. Deep...
Abstract A flexible air electrode (FAE) with both high oxygen electrocatalytic activity and excellent flexibility is the key to performance of various devices, such as Zn–air batteries. facile two‐step method, mild acid oxidation followed by calcination that directly activates commercial carbon cloth (CC) generate uniform nanoporous super hydrophilic surface structures optimized oxygen‐rich functional groups an enhanced area, presented here. Impressively, this activated CC (CC‐AC) exhibits...
The vast majority of the reported hydrogen evolution reaction (HER) electrocatalysts perform poorly under alkaline conditions due to sluggish water dissociation kinetics. Herein, a hybridization catalyst construction concept is presented dramatically enhance HER activities catalysts based on 2D transition metal dichalcogenides (TMDs) (MoS2 and WS2 ). A series ultrathin 2D-hybrids are synthesized via facile controllable growth 3d (Ni, Co, Fe, Mn) hydroxides monolayer 2D-TMD nanosheets....
Biomass is the most abundant renewable resource on earth and developing high-performance nonprecious selective hydrogenation (SH) catalysts will enable use of biomass to replace rapidly diminishing fossil resources. This work utilizes ZIF-67-derived nitrogen-doped carbon nanotubes confine Co nanoparticles (NPs) with Co-Nx active sites as a SH catalyst. The confined NPs exhibit excellent catalytic activity, selectivity, stability toward wide range biomass-derived compounds. Such can...
The development of single electrode with multifunctional purposes for electrochemical devices remains a symbolic challenge in recent technology. This work explores interfacially-rich transition metal nitride hybrid that consist nickel and vanadium oxynitride (VO0.26N0.52) on robust carbon fiber (denoted CF/Ni3N/VON) as trifunctional hydrogen evolution reaction (HER), oxygen (OER), sodium ion batteries (SIBs). as-prepared CF/Ni3N/VON exhibits low HER overpotential 48 [email protected] mA...
Photothermal CO2 hydrogenation to high-value-added chemicals and fuels is an appealing approach alleviate energy environmental concerns. However, it still relies on the development of earth-abundant, efficient, durable catalysts. Here, design N-doped carbon-coated Co nanoparticles (NPs), as a photothermal catalyst, synthesized through two-step pyrolysis Co-based ZIF-67 precursor, reported. Consequently, catalyst exhibits remarkable activity stability for CO with 0.75 mol gcat-1 h-1...
In this paper, hollow nanospheres (HNSs) of metal oxides (NiO, CuO, and NiO/CuO) coated with a porous carbon shell (HNSs@C) good structural stability were successfully prepared on the basis nanoscale Kirkendall effect. The formation process was based template-free method, as-prepared HNSs@C are very clean compared products template process. addition, results N2 adsorption-desorption noted that both oxide HNSs mesoporous structures. Therefore, small molecules can access inner space whole...
One-step concurrent growth of a Co<sub>9</sub>S<sub>8</sub>/carbon nanosheet composite as an efficient and robust oxygen evolution electrocatalyst.
A strongly coupled CoCr2O4/carbon nanosheet composite is concurrently grown via a facile one-step molten-salt calcination approach. The strong coupling between carbon and CoCr2O4 has improved the electrical conductivity preserved active sites in catalysts. These results may pave way to improve performance of spinel oxides as electrocatalysts for oxygen evolution reactions.
Electronic structure engineering via integrating two defect structures with opposite modulation effects holds the key to fully unlocking power of a catalyst. Herein, an interpolation principle is proposed activate CoOOH W doping and Co vacancies for oxygen evolution reaction. Density functional theory suggests roles dopant vacancy but synergy between them in tuning electronic states site, leading near-ideal intermediate energetics dramatically lowered catalytic overpotential. Experimental...
Scalable and controllable fabrication of CNT-supported yolk-shelled Si/C anodes with advanced in operando mechanical quantification using a new electrochemical transmission electron microscope measurement system.
Ultrathin MoS2 nanostructured films with a surface exposed layered nanosheet structure were successfully grown onto fluorine-doped tin oxide (FTO) conducting substrates by facile one-pot hydrothermal method. After calcination at 400 °C in argon, the resulting directly used as counter electrodes (CEs) for dye-sensitised solar cells (DSSCs), exhibiting excellent DSSC performance. The reaction temperature and molar ratio of precursors found to have significant influence on MoS2, thus DSSCs It...
We report the use of passion fruit-like double-carbon-shell porous carbon microspheres (PCMs) as sulfur substrate in room-temperature sodium–sulfur batteries. The PCMs are covered by microsized shells on outside and consisted nanobeads with hollow structure inside, leading to a unique multidimensional scaling high electronic conductivity strengthened mechanical properties. Sulfur is filled inside (PCMs–S) protected double-carbon-shell, which means subsequently generated intermediate sodium...
Abstract The symmetric batteries with an electrode material possessing dual cathodic and anodic properties are regarded as ideal battery configuration because of their distinctive advantages over the asymmetric in terms fabrication process, cost, safety concerns. However, development high‐performance is highly challenging due to limited availability suitable materials such reversible capacity. Herein, a triple‐hollow‐shell structured V 2 O 5 (THS‐V ) capacity >400 mAh g −1 between 1.5 4.0...
The 3d transition metals have been investigated as active centers in NiOOH to catalyze oxygen evolution reaction (OER); however, questions about the mechanism remain. Here, we study how cobalt (Co) and iron (Fe) doping CoFe codoping determine OER activity of via experiments theoretical calculations. results show that both Co Fe, with enhanced density states near Fermi level, decrease overpotential by increasing binding energy O∗ consequently exhibit higher activities than nickel. In...
Rechargeable aqueous zinc-ion batteries (ZIBs) are promising in stationary grid energy storage due to their advantages safety and cost-effectiveness, the search for competent cathode materials is one core task development of ZIBs. Herein, authors design a 2D heterostructure combining amorphous vanadium pentoxide electrochemically produced graphene oxide (EGO) using fast scalable spray drying technique. The unique heterostructured xerogel achieved by controlling concentration EGO precursor...
Due to its high theoretical capacity, silicon is the most promising anode candidate for future lithium-ion batteries with energy density and large power. Yet low conductivity poor structural stability resulting from huge volume expansion after full lithiation are still critical issues impacting practical applications of anodes. This review unveils how designs address these challenges outlines evolution Up now, six generations have been proposed anodes, encompassing solid nanostructures,...