Sreenivasan Nagappan

ORCID: 0000-0003-2149-8111
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Research Areas
  • Electrocatalysts for Energy Conversion
  • Advanced battery technologies research
  • Advanced Photocatalysis Techniques
  • Supercapacitor Materials and Fabrication
  • Ammonia Synthesis and Nitrogen Reduction
  • Fuel Cells and Related Materials
  • Electrochemical Analysis and Applications
  • Catalytic Processes in Materials Science
  • Nanomaterials for catalytic reactions
  • Metal-Organic Frameworks: Synthesis and Applications
  • Layered Double Hydroxides Synthesis and Applications
  • Gold and Silver Nanoparticles Synthesis and Applications
  • Copper-based nanomaterials and applications
  • Quantum Dots Synthesis And Properties
  • biodegradable polymer synthesis and properties
  • Electrospun Nanofibers in Biomedical Applications
  • Advanced Memory and Neural Computing
  • Hybrid Renewable Energy Systems
  • Conducting polymers and applications
  • Hydrogen Storage and Materials
  • Chalcogenide Semiconductor Thin Films
  • Advancements in Battery Materials
  • Advanced Sensor and Energy Harvesting Materials
  • Electrochemical sensors and biosensors
  • Advanced Battery Materials and Technologies

Academy of Scientific and Innovative Research
2021-2025

Central Electrochemical Research Institute
2021-2025

Ce 3+ ion doped NiCoLDHs have applied as a promising electrocatalysts for water splitting. 9.715 times high TOF has observed result of doping. DFT study shows that Co-3d states are highly responsible catalytic activity the catalyst.

10.1039/d2ta04647d article EN Journal of Materials Chemistry A 2022-01-01

Oxygen vacancy assisted stabilization of Ru@NiV-LDH was achieved via wet chemical methods. showed an excellent water splitting activity. DFT analysis confirmed the Ru NPs over LDH surface by 3.8 ± 0.5 eV adsorption energy.

10.1039/d1ta09627c article EN Journal of Materials Chemistry A 2022-01-01

Vast attention from researchers is being given to the development of suitable oxygen evolution reaction (OER) electrocatalysts via water electrolysis. Being highly abundant, use transition-metal-based OER catalysts has been attractive more recently. Among various electrocatalysts, layered double hydroxides (LDHs) gained special owing their high stability under conditions. In this work, we have reported synthesis trimetallic NiCoV-LDH a simple wet-chemical method. The synthesized possesses...

10.1021/acs.inorgchem.2c00093 article EN Inorganic Chemistry 2022-03-01

In this review, recent advancement of MOF based materials and their role towards OER is explored. Tuning structures by adopting various synthetic strategical techniques are discussed for the first time.

10.1039/d3qm00089c article EN Materials Chemistry Frontiers 2023-01-01

In order to fulfill the increasing energy demand of world, water electrolysis comes out be an effective method for producing clean H2 fuel. To catalyze both oxygen evolution reaction (OER) and hydrogen (HER) in splitting, inexpensive bifunctional catalyst is highly required. serve this purpose, 3d transition metal-based layer double hydroxides (LDH) proved catalyst. Here, work, we have synthesized Sm-doped NiCu-LDH via a single-step hydrothermal method. The doping rare-earth Sm ions...

10.1021/acsaem.3c01338 article EN ACS Applied Energy Materials 2023-08-29

The development of low-cost, efficient catalysts for electrocatalytic water splitting to generate green hydrogen is a hot topic among researchers. Herein, we have developed highly heterostructure CoCr-LDH on NiO nickel foam (NF) the first time. preparation strategy follows simple annealing cleaned NF without using any Ni salt precursor, followed by growth nanosheets over surface-oxidized NF. CoCr-LDH/NiO/NF catalyst shows excellent activity and stability toward oxygen evolution reaction...

10.1021/acsami.3c17540 article EN ACS Applied Materials & Interfaces 2024-01-24

Electrocatalytic water splitting has gained vast attention in recent decades for its role catalyzing hydrogen production effectively as an alternative to fossil fuels. Moreover, the designing of highly efficient oxygen evolution reaction (OER) electrocatalysts across universal pH conditions was more challengeable harsh anodic potentials, it questions activity and stability concerned catalyst. Generally, geometrical engineering electronic structural modulation catalyst can boost OER activity....

10.1021/acsami.1c20752 article EN ACS Applied Materials & Interfaces 2021-12-24

Rational design and fabrication of electrocatalysts with outstanding performances long-term durabilities are highly challenging for overall water-splitting reactions. Herein, interfacially engineered CoS@NiV-LDH heterostructures fabricated by a simple top-down approach used as bifunctional water splitting. Experimental results proved that the creation an interface between pristine CoS NiV-LDH can optimize electronic structure active sites transferring electrons from site to CoS, which boosts...

10.1021/acssuschemeng.2c03292 article EN ACS Sustainable Chemistry & Engineering 2022-08-15

In the 21st century, it is indeed necessary to produce green hydrogen as an alternative energy source for future generation mitigate harmful effects of shortage nonrenewable sources. To generate via water electrolysis, undeniably develop a cost-effective bifunctional catalyst electrolysis. Presently, layered double hydroxide (LDH) and 1D fibrous materials have been used various applications due their excellent physiochemical properties. Herein, we had synthesized NiFe-LDH Ce doped simple wet...

10.1021/acsaem.2c02388 article EN ACS Applied Energy Materials 2022-10-06

Compositional-variation-induced CoFe-LDHs (with various Co:Fe ratio; LDH, layered double hydroxide) have been prepared via a simple wet-chemical method followed by the formation of 1D microfibers through electrospinning (ES) techniques. The as-synthesized fiber with Co/Fe ratio corresponding to 0.5:1 microfiber (CoFe-LDH0.5 fiber) showed highest oxygen evolution reaction (OER) activity demanding an overpotential value 267 mV while powder material demands 312 at pH = 14. In addition, neutral...

10.1021/acsaem.2c01964 article EN ACS Applied Energy Materials 2022-09-09

Electrocatalysis has emerged as a pivotal field for sustainable energy and environmental solutions, fueling the development of diverse electrocatalysts over past 2 decades. However, comprehensive understanding intricate dynamical processes governing electrochemical reactions remains elusive is hampering efficient catalyst design. Surface-sensitive techniques like in situ/operando Raman spectroscopy are indispensable characterizing these dynamic guiding novel catalysts. This review...

10.1021/acs.jpcc.4c03607 article EN The Journal of Physical Chemistry C 2024-07-29

Abstract Fine control over the Ir precursor to Nickel‐based layered double hydroxides (LDHs) is significant for decorating both single atoms (SA) and nanoclusters (NC), thus modulating catalytic kinetics improving overall performance. In this study, NiMn‐LDH synthesized co‐decorated it with Iridium, introducing a new pathway developing efficient bifunctional electrocatalysts in water‐splitting technologies. Additionally, typical fibrous material has developed by immobilizing. onto PAN...

10.1002/smll.202500081 article EN Small 2025-03-03

To generate green hydrogen by water electrolysis, it is vital to develop highly efficient electrocatalysts for the oxygen evolution reaction (OER). The utilization of various 3d transition metal-based layered double hydroxides (LDHs), especially NiFe–LDH, has gained vast attention OER under alkaline conditions. However, lack a proper electronic structure NiFe–LDH and low stability high-pH conditions limit its large-scale application. overcome these difficulties, in this study, we constructed...

10.1021/acs.inorgchem.2c02947 article EN Inorganic Chemistry 2022-10-12

Water electrolysis encounters a challenging problem in designing highly efficient, long durable, non-noble metal-free electrocatalyst for both oxygen evolution reaction (OER) and hydrogen (HER). Here, our work, two-step hydrothermal was performed to construct hierarchal NiFe-layer double hydroxide (LDH)/CuS over copper foam the overall water splitting reaction. While employed same as an anode material, designed heterostructure electrode NiFe-LDH/CuS/Cu exhibits excellent OER performance it...

10.1021/acs.inorgchem.2c03589 article EN Inorganic Chemistry 2022-12-16

A facile strategy of ex situ guest anion incorporation into CoFe-LDH has been developed, in which the with optimized concentration greatly enhances OER, HER and total water splitting performance CoFe-LDH.

10.1039/d3cy00859b article EN Catalysis Science & Technology 2023-01-01

Selenium anion doping in the core lattice structure of NiV LDH is done for very first time which shows excellent OER and HER performance. Polarization effect electron-dense Se results optimal outcomes Se-NiV TWS.

10.1039/d3ta05646e article EN Journal of Materials Chemistry A 2023-01-01

Effect of scan rate over intrinsic activity or TOF for OER, has been analysed the very first time. It found that increased value varies as a function which arises due to interfacial capacitance.

10.1039/d3ta02540c article EN Journal of Materials Chemistry A 2023-01-01

Electrocatalytic water splitting to hydrogen and oxygen is considered be one of the significant routes for future renewable energy conversion. Therefore, development unique, efficient, cost-effective bifunctional electrocatalysts, which can perform both evolution reaction (HER) (OER), critical accessible utilization energy. The increasing overall efficiency water-splitting pivotal sustainable conversion production. Herein, we present a facile solution-based synthesis route control...

10.1021/acsami.4c19097 article EN ACS Applied Materials & Interfaces 2025-02-25

Spinel NiFe 2 O 4 -NFs and Pd–NiFe were synthesised via an electrospinning (ES) method the designed materials show excellent OER HER activity, respectively. In full-cell studies, it requires a minimum cell voltage of 1.51 V @ 10 mA cm −2 .

10.1039/d2nr02203f article EN Nanoscale 2022-01-01

Finding the active center in a bimetallic zeolite imidazolate framework (ZIF) is highly crucial for electrocatalytic oxygen evolution reaction (OER). In present study, we constructed ZIF system with cobalt and manganese metal ions subjected it to an electrospinning technique feasible fiber formation. The obtained nanofibers delivered lower overpotential value of 302 mV at benchmarking current density 10 mA cm–2 OER study under alkaline conditions. Tafel slope charge-transfer resistance...

10.1021/acsami.2c12643 article EN ACS Applied Materials & Interfaces 2022-10-04

Abstract Hydrogen is a fuel of the future that has potential to replace conventional fossil fuels in several applications. The quickest and most effective method producing pure hydrogen with no carbon emissions water electrolysis. Developing highly active electrocatalysts crucial due slow kinetics oxygen evolution, which limit usage precious metals splitting. Interfacial engineering heterostructures sparked widespread interest improving charge transfer efficiency optimizing...

10.1002/smll.202403908 article EN Small 2024-07-06
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