A5033153358- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- Organic Electronics and Photovoltaics
- Graphene research and applications
- Conducting polymers and applications
- Carbon Nanotubes in Composites
- Perovskite Materials and Applications
- Thin-Film Transistor Technologies
- Advanced Photocatalysis Techniques
- Nanowire Synthesis and Applications
- Advancements in Battery Materials
- Chemical and Physical Properties of Materials
- Bone Tissue Engineering Materials
- Nanopore and Nanochannel Transport Studies
- Nanoparticles: synthesis and applications
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Nanomaterials for catalytic reactions
- Plasmonic and Surface Plasmon Research
- Organic Light-Emitting Diodes Research
- Quantum Dots Synthesis And Properties
- Molecular Junctions and Nanostructures
- Semiconductor materials and interfaces
- Fullerene Chemistry and Applications
University of Isfahan
2011-2025
Aalto University
2015-2023
Islamic Azad University, Arak
2019
Computational Physics (United States)
2017
Iran University of Science and Technology
2011-2015
The development of effective and inexpensive hydrogen evolution reaction (HER) electrocatalysts for future renewable energy systems is highly desired. Platinum-based materials are the most active catalyzing HER, but reducing use Pt required because high price scarcity Pt. Here, we achieve pseudo-atomic-scale dispersion Pt, i.e. individual atoms or subnanometer clusters, on sidewalls single-walled carbon nanotubes (SWNTs) with a simple readily upscalable electroplating deposition method....
Efficient hydrogen evolution reaction (HER) through effective and inexpensive electrocatalysts is a valuable approach for clean renewable energy systems. Here, single-shell carbon-encapsulated iron nanoparticles (SCEINs) decorated on single-walled carbon nanotubes (SWNTs) are introduced as novel highly active durable non-noble-metal catalyst the HER. This exhibits catalytic properties superior to previously studied nonprecious materials comparable those of platinum. The SCEIN/SWNT...
Mesoporous heteroatom-doped carbon-based nanomaterials are very promising as catalysts for electrochemical energy conversion and storage. We have developed a one-step catalytic chemical vapor deposition method to grow highly graphitized graphene nanoflake (GF)–carbon nanotube (CNT) hybrid material doped simultaneously with single atoms of N, Co, Mo (N–Co–Mo–GF/CNT). This high-surface-area has mesoporous structure, which facilitates oxygen mass transfer within the catalyst film, exhibits high...
The success of intermittent renewable energy systems relies on the development storage technologies. Particularly, active and stable water splitting electrocatalysts operating in same electrolyte are required to enhance overall efficiency reduce costs. Here we report a precise facile synthesis method control nitrogen sites for producing doped multi-walled carbon nanotube (NMWNT) with high activity toward both oxygen hydrogen evolution reactions (OER HER). NMWNT shows an extraordinary OER...
Herein, the process of synthesis carbon nanotubes is modified to grow an efficient electrocatalyst for oxygen evolution reaction as a critical in electrochemical water splitting and rechargeable metal–air batteries.
Earth-abundant element-based inorganic–organic hybrid materials are attractive alternatives for electrocatalyzing energy conversion reactions. Such material structures do not only increase the surface area and stability of metal nanoparticles (NPs) but also modify electrocatalytic performance. Here, we introduce, first time, multiwall carbon nanotubes (MWNTs) functionalized with nitrogen-rich emeraldine salt (ES) (denoted as ES-MWNT) a promising catalyst support to boost activity magnetic...
Abstract Efficient hydrogen evolution reaction (HER) through effective and inexpensive electrocatalysts is a valuable approach for clean renewable energy systems. Here, single‐shell carbon‐encapsulated iron nanoparticles (SCEINs) decorated on single‐walled carbon nanotubes (SWNTs) are introduced as novel highly active durable non‐noble‐metal catalyst the HER. This exhibits catalytic properties superior to previously studied nonprecious materials comparable those of platinum. The SCEIN/SWNT...
Abstract The floating catalyst chemical vapor deposition (FCCVD) method for producing single‐walled carbon nanotubes (SWNTs) has demonstrated great potential in transparent conductive film (TCF) application. In FCCVD, reducing the concentration of (CNTs) is a well‐agreed improving conductivity SWNT TCF, achieved by thinner and longer CNT bundles. However, this decreases yield dramatically, which persisted throughout TCF development. Here, production large‐diameter double‐walled (DWNT) TCFs...
Among current technologies for hydrogen production as an environmentally friendly fuel, water splitting has attracted increasing attention. However, the efficiency of electrolysis is severely limited by large anodic overpotential and sluggish reaction rate oxygen evolution (OER). To overcome this issue, development efficient electrocatalyst materials OER drawn much Here, we show that organometallic Ni(II) complexes immobilized on sidewalls multiwalled carbon nanotubes (MWNTs) serve highly...
Water pollution is the most serious environmental issues due to toxic impurity such as dye and pathogenic microorganisms. The main goal of present study produce a novel ternary chitosan–polythiophene–graphene oxide (CS–PTh–GO) bionanocomposites using intercalation GO into CS through solution mixing process followed by in-situ polymerization thiophene for removal killing microorganisms from an aqueous solution. fabricated CS–PTh–GOs were characteristically examined via FTIR, XRD, SEM, TEM,...
Structure-controlled growth of single-walled carbon nanotubes by floating catalyst CVD.
Nanoparticles comprising of transition metals encapsulated in an ultrathin graphene layer ([email protected]) are utilized to anchor very low amount finely dispersed pseudo-atomic Pt function as a durable and active electrocatalyst (Pt/[email for the hydrogen evolution reaction (HER) acidic media. Our experiments show vital role carbon shell thickness efficient utilization Pt. Furthermore, density functional theory calculations suggest that metal-core has crucial achieving promising...
Abstract An effective method for obtaining large amounts of metal nanoparticles (NPs) encapsulated by carbon layers through upcycling from floating‐catalyst aerosol chemical vapor‐deposited nanotubes is demonstrated. NPs with diameters less than 20 μm are selectively extracted the synthesized assortments sonication, centrifugation, and filtration. The particles show an aggregation behavior owing to π–π interaction between graphitic shells surrounding iron carbides. By controlling degree...
Graphene and carbon nanotubes (CNTs) share the same atomic structure of hexagonal lattice. Yet, their synthesis differs in many aspects, including shape size catalyst. Here, we demonstrate a floating-catalyst chemical vapor deposition (FCCVD) technique for substrate-free, single-step growth CNT-graphene heterostructures (CNT-G-H) using ethylene as source. The formation CNT-G-H is directly evidenced by lattice-resolved (scanning) transmission electron microscopy (STEM) diffraction...
A novel method for obtaining metal nanoparticles completely encapsulated by carbon layers plasmon-driven efficiency enhancement without ion-migration in perovskite solar cells is demonstrated. The Iron carbide with diameters of less than 20 µm are selectively extracted. particles show an aggregation behavior owing to the π–π interaction between graphitic carbon-surrounded nanoparticles. By controlling degree aggregation, gap-surface plasmon effect maximized. Upon application nanoparticles,...
An effective method for obtaining large amounts of metal nanoparticles encapsulated by carbon layers through upcycling from floating-catalyst aerosol chemical vapor deposited nanotubes is demonstrated. Nanoparticles with diameters less than 20 µm are selectively extracted the synthesized assortments sonication, centrifugation, and filtration. The particles show an aggregation behavior owing to π–π interaction between graphitic shells surrounding iron carbides. By controlling degree...