Core-Shell Fe3O4@NCS-Mn Derived from Chitosan-Schiff Based Mn Complex with Enhanced Catalytic Activity for Oxygen Reduction Reaction

Li, Yuliang; Bo, Lili; Wang, Wenhui; Li, Tao; Zhang, Qi

doi:10.3390/catal9080692

Cited by 15 publications

(5 citation statements)

References 40 publications

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“…35 The core−shell nanostructures with good stability, functionality, and dispersibility can also efficiently enhance the electrocatalytic performance of a catalyst. 36 Especially, more effective active sites and a large decrease in charge transport resistance can be achieved from the employment of the electrospinning core−shell nanofiber. 32 Based on above facts, it is reasonable to expect that great enhancement in electrocatalytic activity can be obtained by composite hollow metal phosphide with electrospinning core−shell N-doped carbon nanofibers.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In this respect, a hollow structure with abundant hierarchical pores would be expected to provide a highly effective surface area, highly exposed catalytic active sites, and high porosity to improve mass transport and thus enhance catalytic activity of the catalyst . The core–shell nanostructures with good stability, functionality, and dispersibility can also efficiently enhance the electrocatalytic performance of a catalyst . Especially, more effective active sites and a large decrease in charge transport resistance can be achieved from the employment of the electrospinning core–shell nanofiber .…”

Section: Introductionmentioning

confidence: 99%

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CoP/N-Doped Carbon Hollow Spheres Anchored on Electrospinning Core–Shell N-Doped Carbon Nanofibers as Efficient Electrocatalysts for Water Splitting

Tong

et al. 2019

ACS Sustainable Chem. Eng.

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In this work, a series of hybrids of CoP/N-doped carbon hollow spheres anchored on core–shell N-doped carbon nanofibers were facilely fabricated by the electrospinning technique followed by pyrolysis and phosphorization. The as-prepared hybrids exhibited greatly enhanced bifunctional electrocatalytic activities for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) compared to either moiety of CoP/N-doped carbon hollow spheres and core–shell N-doped carbon nanofibers. Especially, the optimum CoP/NCF-200 hybrid exhibited high performances and stabilities for OER in alkaline conditions and for HER in both acidic and alkaline electrolytes. The catalyst also exhibited excellent performance for overall water splitting as both anodic and cathodic catalysts in alkaline media. The density functional theory calculations suggest that the synergy between CoP and N dopants leads to higher catalytic activities for HER and OER and the C atoms between N atoms in the carbon layer are the catalytically active sites for the HER.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CoP/N-Doped Carbon Hollow Spheres Anchored on Electrospinning Core–Shell N-Doped Carbon Nanofibers as Efficient Electrocatalysts for Water Splitting

Tong

et al. 2019

ACS Sustainable Chem. Eng.

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“…The multifaceted characteristics of g-C 3 N 4 -based photocatalysts are emphasized, encompassing their crystal structure, surface physicochemical properties, stability, optical properties, adsorption capabilities, electrochemical behavior, photoelectrochemical performance, and electronic features. , A comprehensive examination is conducted on various design approaches, such as band-gap alteration, defect management, adjustment of dimensionality, customization of pore texture, surface enhancement, creation of heterojunctions, incorporation of cocatalysts, and loading of nanocarbons. , The core of the nanohybrid was occupied by a magnetic member as magnetite nanoparticles, while the arrangement of ions in it was the existence of dual trivalent (Fe 3+ ) and divalent (Fe 2+ ) states. Fe 2+ ions occupy half of the octahedral sites as ferric ions link the adjacent tetrahedral that occupied octahedral sites, ensuing the cubic inverse spinel arrangement. − Due to its extraordinary antiferromagnetic properties, researchers put views toward it to blend the reusability properties with the NC and it holds good for several cycles …”

Section: Introductionmentioning

confidence: 99%

Solid Handmade Ternary Coinage Metal Mentors for Organic Bond-Making and Bond-Breaking Applications

Ravichandran,

Jayachandran,

Annamalai

et al. 2024

Langmuir

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A comparative approach is employed for the novel synthesis of a magnetically recoverable ternary nanocomposite consisting of g-C 3 N 4 -supported Fe 3 O 4 decorated with coinage metals (Au, Ag, and Cu). This synthesis is achieved through a straightforward and convenient one-step grinding protocol. In situ, the nanoparticles were grown on the g-C 3 N 4 -assist Fe 3 O 4 matrix (GCFM), and the agglomeration of these nanoparticles on the matrix creates a pathway for the formation of the nanocomposite (NC). The as-formed CNC was confirmed with the help of characterization analyses, namely XRD, FT-IR, HR-TEM, FE-SEM, XPS, VSM, UV−vis, and NMR studies. Together with NPs and GCFM, with the quantum consequence, the activity of the NC shows better electron transfer via transfer of electrons, which grabs tremendous attention toward it, resulting in enhanced plausible photocatalytic degradation toward pharmaceutical compounds, dyes, and anthropogenic pollutants. The activity of the C-NC hikes at 88% for ciprofloxacin (CX) and 90% for paracetamol (PM); furthermore, the activity of the C-NC hikes at 88% and 87% for xylene Cyanol FF (XCF) and malachite green (MLG), respectively. Interestingly, an added advantage is the formation of a C−C bond (homocoupling reaction) in phenylboronic acid (PA) via a greener solvent under ambient conditions. The yield percentage of the conversion product shows satisfactory results, and its reproducibility was good for the prepared ternary NC. The conversion treatment of anthropogenic pollutants, namely 4-nitrophenol, grasps a high percentage (98%). In addition, the NC shows good activity toward both types of bacteria. The reproducibility of the composite also shows virtuous activity against pharmaceutical as well as toxic contaminants. The as-prepared CNC was specifically engineered to perform both bond formation and bond cleavage of organic molecules under ambient conditions for multiple cycles.

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“…36,37 For example, silica coat not only eases the durability of iron oxide cores but also leads to modification of the surface of various functional groups that can be used for diverse applications. 38,39 Diverse ligands such as di and mono amine bis (phenol), [40][41][42] porphyrin, 43 and Schiff base ligands [44][45][46][47] can be used on Fe 3 O 4 magnetic nanoparticles for preparing the heterogeneously homogenized catalysts that display various catalytic activities. For example, the diamine bis (phenol) ligand was supported on Fe 3 O 4 magnetic nanoparticles and metalled, illustrating excellent efficiency in biodiesel production.…”

Section: Introductionmentioning

confidence: 99%

“…Diverse ligands such as di and mono amine bis (phenol), 40–42 porphyrin, 43 and Schiff base ligands 44–47 can be used on Fe 3 O 4 magnetic nanoparticles for preparing the heterogeneously homogenized catalysts that display various catalytic activities. For example, the diamine bis (phenol) ligand was supported on Fe 3 O 4 magnetic nanoparticles and metalled, illustrating excellent efficiency in biodiesel production 42 …”

Section: Introductionmentioning

confidence: 99%

Molybdenum (VI) complex of resorcinol‐based ligand immobilized on silica‐coated magnetic nanoparticles for biodiesel production

Majedi,

Safaei

2023

Applied Organom Chemis

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Reusability and durability of catalysts are main factors in biodiesel production. Fe3O4@SiO2‐APTES‐MoO2L2DHAPh catalyst was prepared in five steps. At first, Fe3O4 was synthesized and coated with silica (Fe3O4@SiO2). After that, the nanoparticles were functionalized by APTES (Fe3O4@SiO2‐APTES). In following, DHAPh ligand was anchored covalently onto the surface of aminated magnetic nanoparticles (Fe3O4@SiO2‐APTES‐LDHAPh), and at the end, DHAPh ligand was metalled by MoO2(acac)2 salt (Fe3O4@SiO2‐APTES‐MoO2L2DHAPh). The catalyst was characterized with analytical techniques such as FT‐IR, SEM, TEM, XRD, XPS, VSM, ICP, EDX, NH3‐TPD, and TGA. This novel catalyst with acidic and basic sites was used in (trans)esterification reaction for biodiesel production of rapeseed and other oils. The biodiesel yield of rapeseed, soybean, sunflower, and used frying oils was attained 97%, 98%, 96%, and 87%, respectively, under optimized reaction conditions, such as 0.1 mol% amount of catalyst, 0.05 mmol KOH as methanol activator, a short reaction time of 2 h, and methanol to oil ratio of 3:1 at room temperature. The conversion of oil to methyl ester biodiesel was confirmed by FT‐IR, 1H NMR, and GC‐MS analysis. The leaching and reusability tests of the prepared catalyst were checked, which displayed the biodiesel production proceeded via a heterogeneous pathway. Also, this catalyst can be reused for 11 cycles without tangible loss in its catalytic activity. The mentioned heterogeneously homogenized nanocatalyst has the main benefits such as easy reusability, high activity, and selectivity with acidic and basic sites that makes it a potential candidate for both esterification and (trans)esterification of low quality feedstock for low cost biodiesel production.

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Core-Shell Fe3O4@NCS-Mn Derived from Chitosan-Schiff Based Mn Complex with Enhanced Catalytic Activity for Oxygen Reduction Reaction

Cited by 15 publications

References 40 publications

CoP/N-Doped Carbon Hollow Spheres Anchored on Electrospinning Core–Shell N-Doped Carbon Nanofibers as Efficient Electrocatalysts for Water Splitting

CoP/N-Doped Carbon Hollow Spheres Anchored on Electrospinning Core–Shell N-Doped Carbon Nanofibers as Efficient Electrocatalysts for Water Splitting

Solid Handmade Ternary Coinage Metal Mentors for Organic Bond-Making and Bond-Breaking Applications

Molybdenum (VI) complex of resorcinol‐based ligand immobilized on silica‐coated magnetic nanoparticles for biodiesel production

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