A5057149092- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- Nanomaterials for catalytic reactions
- Metal-Organic Frameworks: Synthesis and Applications
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Advanced Nanomaterials in Catalysis
- Electrochemical Analysis and Applications
- Covalent Organic Framework Applications
- Gold and Silver Nanoparticles Synthesis and Applications
- Supercapacitor Materials and Fabrication
- Copper-based nanomaterials and applications
- Synthetic Organic Chemistry Methods
- Electrochemical sensors and biosensors
- Chemical Synthesis and Reactions
- Supramolecular Self-Assembly in Materials
- Nanocluster Synthesis and Applications
- Advanced biosensing and bioanalysis techniques
- Adsorption and biosorption for pollutant removal
- Chemical Synthesis and Analysis
- Advancements in Battery Materials
- MXene and MAX Phase Materials
- Catalysis and Hydrodesulfurization Studies
- Quantum Dots Synthesis And Properties
- Advanced Memory and Neural Computing
Pohang University of Science and Technology
2018-2025
Hanyang University
2017-2019
Seoul Institute
2018
Government of the Republic of Korea
2018
Indian Institute of Technology Kharagpur
2013-2017
Indian Institute of Chemical Technology
1997-2007
The design of efficient, low-cost, and stable electrocatalyst systems toward energy conversion is highly demanding for their practical use. Large scale electrolytic water splitting considered as a promising strategy clean sustainable production. Herein, we report self-supported NiFe layered double hydroxide (LDH)-NiSe by stepwise surface-redox-etching Ni foam (NF) through hydrothermal process. as-prepared LDH-NiSe/NF catalyst exhibits far better performance in alkaline oxidation, proton...
Herein, a simple wet-chemical pathway has been demonstrated for the synthesis of silver nanoparticle conjugated reduced graphene oxide nanosheets where dimethylformamide (DMF) is judiciously employed as an efficient reducing agent. Altogether, DMF reduces both nitrate (AgNO3) and (GO) in reaction mixture. Additionally, presence polyvinylpyrolidone (PVP) assists nanophasic growth homogeneous distribution plasmonic Ag(0). Reduction aggregated Ag NPs on (rGO) are confirmed from various...
The exceptionally high catalytic activity of <italic>in situ</italic> generated ternary Cu<sub>2</sub>O–Cu–CuO nanocomposite obtained from Cu<sub>2</sub>O nanoparticles for 4-nitrophenol reduction is described.
Despite the Pt-catalyzed alkaline hydrogen evolution reaction (HER) progressing via oxophilic metal-hydroxide surface hybridization, maximizing Pt reactivity alongside operational stability is still unsatisfactory due to lack of well-designed and optimized interface structures. Producing atomically flat two-dimensional nanodendrites (2D-PtNDs) through our 2D nanospace-confined synthesis strategy, this study tackles insufficient interfacial contact effect during HER catalysis by realizing an...
Thiourea (TU), a commercially available laboratory chemical, has been discovered to introduce metallogelation when reacted with copper(II) chloride in aqueous medium. The chemistry involves the reduction of Cu(II) Cu(I) concomitant oxidation thiourea dithiobisformamidinium dichloride. gel formation is triggered through metal–ligand complexation, i.e., Cu(I)-TU coordination and extensive hydrogen bonding interactions involving thiourea, disulfide product, water, ions. Entangled network...
Supramolecular colorless copper(I)–thiourea hydrogel (Cu-TU gel) has been made a mechanically strong functional hybrid material in the graphene oxide (GO) framework. Mild heat treatment (85 °C) of fetches black product containing hierarchical copper sulfide decorated reduced nanosheets (CuS-rGO) through an obvious in-house redox transformation reaction between Cu(I) and GO without any additive. The as-synthesized CuS-rGO nanocomposite exhibits impressive peroxidase-like activity where...
Mesoporous nickel oxide nanoflowers (NiO NFs) can be easily synthesized by a two-step synthetic procedure based on modified hydrothermal (MHT) treatment of acetate and ethanol amine in water followed thermal decomposition at 350 °C for 4 h. After treatment, the porosity is increased 18% with retention parental hydroxide size. In this study, first time, new catalytic application NiO NFs has been revealed terms peroxidase-like activity where colorless 3,3',5,5' tetramethylbenzidine (TMB)...
It has recently been demonstrated that the OER activity of transition metal sulfides (TMSs) could be enhanced by introduction a thin amorphous layer on pristine surface.
Rational engineering and assimilation of diverse chemo- biocatalytic functionalities in a single nanostructure is highly desired for efficient multistep chemical reactions but has so far remained elusive. Here, we design synthesize multimodal catalytic nanoreactors (MCNRs) based on mesoporous metal-organic framework (MOF). The MCNRs consist customizable metal nanocrystals stably anchored enzymes the mesopores, as well coordinatively unsaturated cationic MOF nodes, all within nanoreactor...
Next-generation electrocatalysts with smart integrated designs, maximizing the chemical cascade synergy for sustainable hydrogen production, are needed to address urgent environmental threats, but scalable synthesis of precisely architectured nanohybrids rendering a few-nanometer interfacial controllability augment catalytic reactivity and operational stability is major bottleneck. Herein, by inventing surface-confined lateral growth nanometer-thin nanoporous two-dimensional (2D)-Pt on...
The importance of an interfacial reaction to obtain mesoporous leafy nanostructures gold and palladium has been reported. A new synthetic strategy involving 1,4-dihydropyridine ester (DHPE) as a potential reducing agent performs exceptionally well for the desired morphologies both noble metals at room temperature. DHPE in turn transforms into its oxidized aromatic form. as-synthesized leaves exhibit high surface-enhanced Raman scattering activity with rhodamine 6G (R6G) due their...
Herein, we report a new strategy to remove toxic Cr(VI) ion from aqueous solution using metal-organic hybrid gel as sorbent. The could be easily synthesized the commercially available organic ligand 2-mercaptobenzimidazole (2-MBIm) and copper(II) chloride in alcoholic medium. synthesis involves one-electron reduction of Cu(II) Cu(I) by 2-MBIm, then formation is triggered through Cu(I)-ligand coordination extensive hydrogen-bonding interactions involving "-NH" protons (of 2-MBIm ligand),...
An Au<sub>core</sub>–Pd<sub>shell</sub>-decorated reduced graphene oxide nanocomposite is successfully employed for the electrochemical detection of low-level hydrazine in an aqueous solution.
Morphology of a material with different facet, edge, kink, etc., generally influences the rate catalytic reaction.1,2 Herein, we account for importance altered morphology nanomaterial supercapacitor device and employed CoSn(OH)6 as an electrode material. Suitable fabrication stable aqueous asymmetric (AAS) using metal hydroxide positive can be beneficial if high energy density is derived without sacrificing power density. Here have synthesized uncommon hierarchical mesoporous nanostructured...
The performance of nanocrystal (NC) catalysts could be maximized by introducing rationally designed heterointerfaces formed the facet- and spatio-specific modification with other materials desired size thickness. However, such are limited in scope synthetically challenging. Herein, we applied a wet chemistry method to tunably deposit Pd Ni on available surfaces porous 2D-Pt nanodendrites (NDs). Using 2D silica nanoreactors house 2D-PtND, an 0.5-nm-thick epitaxial or layer (e-Pd e-Ni) was...
Electrochemical processing has already manifested its prominence for obtaining well structured composite materials. The method is highly precise and reduction potential driven. This methodology resulted in a hierarchical Au–CuO nanocomposite from chosen redox transformation reaction between the newly synthesized spherical roughened Cu2O nanoparticles HAuCl4. Thus attractive shape as reducing capability of made it promising starting material. proposed does not need any additional or...
Dog-bone shaped Au NR<sub>core</sub>–Pt/Pd<sub>shell</sub> decorated reduced graphene oxide nanocomposites (GMTs) exhibit outstanding electrocatalytic activity and durability towards ethanol oxidation reaction.
Abstract The development of noble‐metal‐free, efficient, electrochemical, water‐splitting catalyst systems has attracted considerable attention in recent times. In this study, a metal–organic framework based synthetic route to couple two non‐noble‐metal‐based catalysts, CoP and Mo 2 C, supported on nitrogen‐doped carbon been developed. strategy enables the formation nanohybrid with an attractive pea‐like morphology, which spherical particles (≈10 nm) are embedded two‐dimensional enriched...
We report an environmentally friendly synthetic strategy to fabricate reduced graphene oxide (rGO)-based ternary nanocomposites, in which glutathione (GSH) acts both as a reducing agent for and sulfur donor CdS synthesis under modified hydrothermal (MHT) conditions. The becomes interesting pH variation evolves two distinctly different semiconducting nanocrystals of anatase/rutile TiO2 hexagonal yellow/cubic red CdS, their packaging makes them suitable photocatalysts dye degradation. Herein,...
Abstract The development of transition‐metal‐based materials for electrochemical energy conversion and storage has received immense interest throughout the last two decades. In this respect, zeolitic imidazolate framework (ZIF)‐derived are particularly important accessing various morphologies, sizes, exposed facets, variations in electronic structure, high surface area, large numbers available active sites. properties ZIF‐derived can be tuned by applying different synthetic protocols,...
Ultrathin 2D Co3O4 and Co3V2O8 nanosheets have been produced from our modified hydrothermal technique (MHT). Both the materials proved to be extraordinary electrode for pseudocapacitors. The neat of exhibit a record specific capacitance value 1256 F g(-1) 4194 at 1 A current density, respectively.