@article { ISI:000314791100023, title = {Novel vanadium n-propylamino phosphate catalyst: synthesis, characterization and applications}, journal = {Materials Research-Ibero-American Journal of Materials}, volume = {16}, number = {1}, year = {2013}, month = {JAN}, pages = {181-189}, publisher = {UNIV FED SAO CARLOS, DEPT ENGENHARIA MATERIALS}, address = {LABORATORIA DE MATERIAIS VITREOS, CAIXA POSTAL 676, SAO CARLOS, 13565-905SP, BRAZIL}, abstract = {

A novel, lamellar type Vanadium n-propylamino phosphate catalyst is synthesized and characterized by using various physicochemical techniques such as Powder X-ray diffraction, Scanning electron microscopy/Energy dispersive X-ray analysis, Thermogravimetry/Differential thermal analysis, Fourier transform Infrared analysis, Electron spin resonance spectroscopy, Ultraviolet - Visible Diffuse reflectance spectroscopy, X-ray Photoelectron spectroscopy, P-31 Magic angle spinning Nuclear Magnetic Resonance spectroscopy and Catalytic applications toward Octahydroquinazolinone synthesis. It is found that the n-propylamine is present as sandwich between Vanadyl phosphate layers. Most of the Vanadium is present as V4+ ions in tetrahedral co-ordination. Vanadium n-propylamino phosphate catalyses Octahydroquinazolinone synthesis more effeciently and the optimum conditions required for Octahydroquinazolinone synthesis are, Benzaldehyde (2 mmol), Dimedone (2 mmol), Urea (4 mmol), Methanol + Water (1:1, 5 mL) and Catalyst (0.05 g). A plausible mechanism is also proposed.

}, keywords = {n-propylamino phosphate, octahydroquinazolinones, synthesis, Vanadium}, issn = {1516-1439}, doi = {10.1590/S1516-14392012005000161}, author = {Anumula, Rajini and Nookaraju, Muralasetti and Selvaraj, Kaliaperumal and Reddy, Ingala Ajit Kumar and Narayanan, Venkatathri} } @article { ISI:000365203000041, title = {Non-templated ambient nanoperforation of graphene: a novel scalable process and its exploitation for energy and environmental applications}, journal = {Nanoscale}, volume = {7}, number = {46}, year = {2015}, month = {OCT}, pages = {19705-19713}, publisher = {ROYAL SOC CHEMISTRY}, type = {Article}, address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND}, abstract = {

Nano-perforation of 2D graphene sheets is a recent and strategically significant means to exploit such materials in modern applications such as energy production and storage. However, current options for the synthesis of holey graphene (hG) through nano-perforation of graphene involve industrially undesirable steps viz., usage of expensive/noble metal or silica nanoparticle templates and/or hazardous chemicals. This severely hampers its scope for large scale production and further exploitation. Herein, we report for the first time a scalable non-templated route to produce hG at ambient conditions. Nano-perforation is achieved with tunable pore size via the simple few layer co-assembly of silicate-surfactant admicelles along the surface of graphene oxide. A gentle alkali treatment and a reduction at optimized conditions readily yielded holey graphene with a remarkable capacitance (similar to 250 F g(-1)) and interesting adsorption abilities for pollutants. Density functional theory based computational studies reveal interesting insights on the template free nano-perforation at a molecular level. This simple rapid process not only excludes the need for expensive templates and harmful chemicals to yield hG at attractively ambient, chemically placid and industrially safer conditions, but also creates no hurdles in terms of scaling up.

}, issn = {2040-3364}, doi = {10.1039/c5nr05715a}, author = {Jhajharia, Suman Kumari and Selvaraj, Kaliaperumal} } @article {49051, title = {Nanocrystalline (NixCo(1-x))3(PO4)2@FeSe2/NF as a promising OER electrocatalyst for alkaline water electrolysis}, journal = {International Journal of Hydrogen Energy}, volume = {59}, year = {2024}, month = {MAR}, pages = {74-81}, type = {Article}, abstract = {

Affordable and sustainable hydrogen production is the need of the hour owing to the mounting global pursuit for the hydrogen economy. Water splitting is the premier go -to method to produce green hydrogen at a larger scale in which the half -cell Oxygen Evolution Reaction (OER) demands a larger amount of energy expenditure due to its sluggish kinetics. Hence, designing an efficient OER electrocatalyst, especially for alkaline water electrolysis that offers alternatives to the usage of precious group metals is a pressing priority. Herein, we report a novel nanocrystalline electrocatalyst consisting of two components, namely cobalt nickel phosphate and iron diselenide synthesised via a two-step electrodeposition at room temperature. The combination of the two components on the porous nickel foam substrate exhibits an overpotential of 272 mV at 100 mA/cm2 in 1 M KOH showing a low Tafel slope of a mere 38 mV/dec with appreciable retention even after 24 h of stability test at a relatively higher current density. The surface reconstruction that occurs when FeSe2 is electrodeposited on (Ni0.35Co0.65)3(PO4)2@NF and the synergy between the two components is the primary reason for the improved performance. Thus, this work highlights the ambient synthesis of a highly durable earth -abundant metal -based electrocatalyst which exceeds the performance of the standard Ru/C by a decent margin.

}, keywords = {Alkaline Water Electrolysis, Ambient synthesis, Electrodeposition, Non-PGM based Electrocatalyst, OER}, issn = {0360-3199}, doi = {10.1016/j.ijhydene.2024.01.264}, author = {Christi, Darren Sebastian and Selvaraj, Kaliaperumal} }