The incorporation of iron into the cobalt-based metal–organic framework modifies electronic environment and resulting bimetallic MOF exhibits enhanced oxygen evolution reaction performance.

In the search for alternative sources to replace fossil fuels, carbon nitride materials can be used in a variety of ways. present work, porosity is introduced material using mesoporous silica material, MCM-41, as hard template, and (MCN) synthesized. Further, MCN modified by immobilizing metal phthalocyanine (MPc, where M = Mn, Fe, Co, Ni, Cu, Zn). The resulting MPc-incorporated (MPc@MCN) were tested electrocatalytic oxygen reduction reaction (ORR) acidic basic media. Detailed studies reveal...

Hydroperoxyl intermediate is a vital component in the mechanism of electrochemical oxygen reduction reaction (ORR) and several other important chemical reactions. The selectivity kinetics ORR are controlled by energetics *OOH (* represents active site). present work integrates iron phthalocyanine (FePc) with sulfonic acid-functionalized multiwalled carbon nanotubes (MWCNTs-SO3H). resulting composite (FePc@MWCNTs-SO3H) demonstrates significantly improved higher four-electron for compared to...

Iron phthalocyanine (FePc) has been integrated on boron-doped reduced graphene oxide (B-RGO) resulting in the composite, FePc@B-RGO which shows a highly selective four-electron oxygen reduction reaction.

Water oxidation is a crucial half-cell reaction in water splitting, metal–air batteries, and CO2 reduction. In this work, cobalt- vanadium-containing mixed oxides [Cox(VO)yOz] are synthesized, further, unique composite of oxide nanocrystals with covalent organic polymer [Cox(VO)yOz@COP] prepared. A high increase activity stability exhibited by the Cox(VO)yOz@COP comparison to its independent counterparts. Higher attributed presence VO2+/VO2+ couple, which helps facile CoOOH CoO2 enhances...

Dioxidovanadium(V) complex [VVO2(sal-aebmz)] (1) (where Hsal-aebmz = Schiff base derived from the condensation of salicylaldehyde and 2-aminoethylbenzimidazole) has been immobilized on chloromethylated polystyrene (PS-Cl) cross-linked with divinylbenzene to obtain [VVO2(sal-aebmz)]@PS (2), a heterogeneous complex. Both complexes, after characterization, have used as catalysts explore single pot multicomponent (benzaldehyde or its derivatives, urea ethyl acetoacetate) Biginelli reaction...

Efficient and low-cost bifunctional electrocatalyst for oxygen electrocatalysis is developed using nickel sulfide multi-walled carbon nanotubes.

Stability and efficiency of CoTMPP@MCN along with the general strategy for tuning active site.

A series of metal–organic frameworks (MOFs) with varying Ni : Co ratios are synthesized by an easy one-step solvothermal method using trimesic acid as organic linker.

The electrochemical water splitting by transition metal complexes is emerging very rapidly. nickel also play a vital role in various biological activities. Here, three new ligands {H2mbhce = N'-(4-methyl-benzoyl), H2pchce N'-(pyridine-carbonyl) and H2hbhce N'-(2-hydroxy-benzoyl) hydrazine carbodithioic acid ethyl ester} their corresponding Ni(II) [Ni(Hmbhce)2(py)2] (1), [Ni(pchce)(o-phen)2]·CH3OH·H2O (2) [Ni(hbhce)(o-phen)2]·1.75CHCl3·H2O (3) have been synthesized fully characterized...

Abstract This work reports an electrochemical sensing framework for nicotine determination based on glassy carbon electrode (GC) immobilized with Fe(bpy) 3 2+ (where bpy is 2,2’‐bipyridyl) supported by Nafion and multi‐walled nanotubes (Nf‐MWCNTs). Nf‐MWCNTs modified GC (GC/Nf‐MWCNTs/Fe(bpy) ) manifests stable redox peaks, characteristics of . The GC/Nf‐MWCNTs/Fe(bpy) exhibits effective oxidation nicotine, diminishing the overpotential relative to GC/Nf‐MWCNTs. limit detection 0.1 μM...

The synthesis of defect-rich materials is significant interest for electrochemical energy conversion, including water splitting. Herein, we report a novel strategy the sulfur-doped mesoporous conducting carbon nitride supported cobalt sulfide (O-Co3S4@S-MCN). Mesoporous silica material (MCM-41) used as template synthesis, and it performs dual functions: introducing porosity providing in situ oxygen to fill defects. O-Co3S4@S-MCN highly crystalline shows characteristic diffractions indicating...

C 3 symmetric trinuclear cis -[MoO 2 ] complexes have been isolated successfully and explored as catalysts for the synthesis of 2-methyl-1,4-naphthoquinone (vitamin K , Menadione), olefin epoxide brominated phenol derivatives.

Abstract In nature, catechol oxidase catalyzes the oxidation of o ‐diphenol to ‐quinone produce a series highly important polyphenolic natural products. Although mimicking functionality enzyme using nanozyme was found be beneficial, attaining high specificity is challenging. Herein, we have explored thickness‐dependent activity and Cu‐metal‐organic framework (MOF) nanosheets. The unique synthetic method offers control over thickness Cu‐MOF ultrathin (4 nm) (Cu‐UMOF) nanosheets as an exhibit...

Electrocatalytic water oxidation by transition metal complexes is an emerging area of research. Here, two cobalt(III) [Co(ftsm)NH 3 ( o ‐phen)]·H 2 O 1 ) {ftsm = bis (5‐furan‐1,2,4‐triazole)‐3‐sulfinamide} and [Co(ptsm)NH ‐phen)]·CH OH {ptsm (5‐phenyl‐1,2,4‐triazole)‐3‐sulfinamide} were synthesized characterized various spectroscopic X‐ray crystallography techniques. Complexes found to have admirable electrocatalytic activity towards oxygen evolution reaction (OER). The Tafel slope values...

A series of Ni(II) complexes [Ni(tmeda)(fCOS)2] (1a), [Ni(2,2′-bipy)(fCOS)2] (1b), [Ni(1,10-Phen)(fCOS)2] (1c), [Ni(opda)2(fCOS)2] (2), [Ni(dppe)(fCOS)2] (3a), and [Ni(dppee)(fCOS)2] (3b) (fCOS = furan-2-thiocarboxylate) have been synthesized. All the complexes, except 1b, were characterized by single-crystal X-ray diffraction analysis spectroscopic techniques. In solid state, geometry around center is square planar in cases 3a 3b, while same octahedral (with varying degrees distortion) all...

In the present work, oxygen reduction reaction (ORR) is explored in an acidic medium with two different catalytic supports (multi-walled carbon nanotubes (MWCNTs) and nitrogen-doped multi-walled (NMWCNTs)) catalysts (copper phthalocyanine (CuPc) sulfonic acid functionalized CuPc (CuPc-SO3- )). The composite, NMWCNTs-CuPc-SO3- exhibits high ORR activity (assessed based on onset potential (0.57 V vs. reversible hydrogen electrode) Tafel slope) comparison to other composites. Rotating ring disc...

Abstract Tetradentate ONNO donor ligands H 2 hz(fp) ( I ), hz(butp) II ) and hz(bp) III synthesized by the reaction of hydrazine hydrate with 4‐formyl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (fp), 4‐butyryl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (butp) 4‐benzoyl‐3‐methyl‐1‐phenyl‐5‐pyrazolone (bp), respectively, react [Mo VI O (acac) ] in 1 : molar ratio refluxing methanol to give binuclear complexes [(μ‐O){Mo (H O)} 3 ). All are characterized several techniques that include, FT‐IR, UV/Vis, NMR, 13 C NMR...

Mesoporous carbon, synthesized from soybean using NaCl as a template, is further integrated with iron phthalocyanine. This combination yields material (FePc@SN950) enhanced selectivity for the four-electron oxygen reduction process.