Mesoporous cobalt ferrite: A rival of platinum catalyst in methane combustion reaction

Dumitru, Raluca; Papa, Florica; Balint, Ioan; Culiță, Daniela C.; Munteanu, Cornel; Stănică, Nicolae; Ianculescu, Adelina; Diamandescu, L.; Carp, Oana

doi:10.1016/j.apcata.2013.07.013

Cited by 38 publications

(19 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The IR spectrum of the oxalate precursor ( Figure 1a and Table S1 Electronic Supplementary Material) displays a strong band at 1622 cm −1 , attributed to ν asym(OCO) vibration, and the bands at 1391 cm −1 and 910 cm −1 attributed to ν sym(OCO) confirm that the ligand acts as a bidentate [32,33].…”

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatmentioning

confidence: 97%

See 1 more Smart Citation

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

et al. 2018

Self Cite

View full text Add to dashboard Cite

Zinc chromite (ZnCr 2 O 4 ) has been synthesized by the thermolysis of a new Zn(II)-Cr(III) oxalate coordination compound, namely [Cr 2 Zn(C 2 O 4 ) 4 (OH 2 ) 6 ]·4H 2 O. The coordination compound has been characterized by chemical analysis, infrared spectroscopy (IR), and thermal analysis. The zinc chromite obtained after a heating treatment of the coordination compound at 450 • C for 1 h has been investigated by XRD, FE-SEM, TEM/HR-TEM coupled with selected area electron diffraction (SAED) measurements. The photocatalytic performance of nanosized zinc chromite was assessed for the degradation and mineralization of humic acid (HA) from a drinking water source, envisaging the development of the advanced oxidation process for drinking water treatment technology. A mineralization efficiency of 60% was achieved after 180 min of 50 mg L −1 HA photocatalysis using zinc chromite under UV irradiation, in comparison with 7% efficiency reached by photolysis.

show abstract

Section: Synthesis and Characterization Of The Cr 3+ -Zn 2+ Coordinatmentioning

confidence: 97%

“…After the metallic cations were retained and the remained solution evaporated, the solid oxalic acid (H 2 C 2 O 4 ·2H 2 O) was obtained. (Figure 1b and Table S2 Electronic Supplementary Material), and specific reactions [32].…”

Section: Methodsmentioning

confidence: 99%

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Transition metal (such as Mn, Fe, Cu, Co, Ni, Cu etc.) [11][12][13][14][15][16][17][18] oxide catalysts have been receiving considerable attention to substitute for noble metal due to the economic reason. However, the intrinsic activity of transition metal oxide catalysts is much lower than that of noble metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Co/Ni ratios in cobalt nickel mixed oxide catalysts on methane combustion

Lim

Cho

Yang

et al. 2015

Applied Catalysis A: General

View full text Add to dashboard Cite

2Graphical abstract Highlights 1. Co-Ni mixed oxide having the ratios of Co to Ni of (50:50) exhibits the highest activity among the known transition metal oxide catalysts.2. Co-Ni mixed oxides having the ratios of Co to Ni of (50:50) show the highest activity for methane combustion.3. Distorted NiCo2O4 spinel structure plays a key role as the active sites for methane combustion.3 Abstract A series of cobalt nickel mixed oxide catalysts with the varying ratios of Co to Ni, prepared by co-precipitation method, were applied to methane combustion. Among the various ratios, cobalt nickel mixed oxides having the ratios of Co to Ni of (50:50) and (67:33) demonstrate the highest activity for methane combustion. Structural analysis obtained from X-Ray Diffraction (XRD) and Extended X-ray Absorption Fine Structure (EXAFS) evidently demonstrates that CoNi (50:50) and (67:33) samples consist of NiCo2O4 and NiO phase and, more importantly, NiCo2O4 spinel structure is largely distorted, which is attributed to the insertion of Ni 2+ ions into octahedral sites in Co3O4 spinel structure. Such structural disorder results in the enhanced portion of surface oxygen species, thus leading to the improved reducibility of the catalysts in the low temperature region as evidenced by temperature programmed reduction by hydrogen (H2 TPR) and X-ray Photoelectron Spectroscopy (XPS) O 1s results. They prove that structural disorder in cobalt nickel mixed oxides enhances the catalytic performance for methane combustion. Thus, it is concluded that a strong relationship between structural property and activity in cobalt nickel mixed oxide for methane combustion exists and, more importantly, distorted NiCo2O4 spinel structure is found to be an active site for methane combustion.

show abstract

“…Jang et al synthesized magnetically separable Rh-Fe 3 O 4 heterodimer nanocrystals and established excellent activities for the selective reduction of nitroarenes and alkenes. [22][23][24][25][26][27] Cobalt ferrite has been found to be inactive for the reduction of nitroarenes. 17 The Fe 3 O 4 @Cu displayed high catalytic activity for the degradation of organic dye.…”

Section: Introductionmentioning

confidence: 99%

Facile protocol for reduction of nitroarenes using magnetically recoverable CoM_0.2Fe_1.8O₄ (M = Co, Ni, Cu and Zn) ferrite nanocatalysts

et al. 2015

View full text Add to dashboard Cite

GRAPHICAL ABSTRACT:Cu ions occupy the catalytically active octahedral sites of the ferrite sub-lattice and present a synergistic effect due to the formation of Cu-Co and Cu-Fe ion pairs which triggers up the catalytic performance of CoCu 0.2 Fe 1.8 O 4 ferrite nanoparticles for the reduction of nitroarenes. AbstractTransition metal doped cobalt ferrite (CoM 0.2 Fe 1.8 O 4 (M= Co, Ni, Cu, Zn)) nanoparticles were fabricated using the sol-gel methodology. The obtained ferrite nanoparticles were annealed at 400 °C and characterized using Fourier transform infra-red spectroscopy (FT-IR), X-ray diffraction (XRD), High resolution transmission electron microscopy (HR-TEM), Vibrating sample magnetometer (VSM) and Energy dispersive X-ray (EDX) and Scanning transmission electron microscopy (STEM). In the FT-IR spectra two bands in the range 1000-400 cm -1 were observed corresponding to the M-O bond in the tetrahedral and octahedral sites. XRD patterns confirmed the formation of cubic spinel structure with Fd-3m space-group. HR-TEM analysis revealed the quasi-spherical shape with particle size in the range 20-30 nm for all the synthesized ferrite nanoparticles. The lattice inter-planar distance of 0.29, 0.25, 0.21 and 0.16 nm obtained from HR-TEM corresponding to (2 2 0), (3 1 1), (4 0 0) and (5 1 1) lattice planes respectively were in complete agreement with the XRD data. The EDX-STEM confirmed the elemental composition as per the desired stoichiometric ratio. The catalytic efficiency of the synthesized ferrite samples was explored for the reduction of nitrophenols. Cu substituted cobalt ferrite nanoparticles (CoCu 0.2 Fe 1.8 O 4 ) possessed excellent catalytic activity while CoM 0.2 Fe 1.8 O 4 (M= Co, Ni and Zn) were inactive for the same. Substrate scope of the developed protocol was also evaluated for the reduction of various CH 3 -, NH 2 -, Br-, Cl etc. substituted nitroaromatic compounds. Research highlights:• CoM 0.2 Fe 1.8 O 4 (M= Co, Ni, Cu, Zn) fabricated by sol-gel methodology.• Comparative catalytic efficiency of transition metal doped cobalt ferrites.• CoCu 0.2 Fe 1.8 O 4 as excellent catalysts for the reduction of nitroarenes.• Facile protocol for the synthesis of aromatic amines Keywords:Catalytic reduction Nitroarenes Magnetically recoverable nanoferrites Catalytically active octahedral sites Synergistic effect

show abstract

Mesoporous cobalt ferrite: A rival of platinum catalyst in methane combustion reaction

Cited by 38 publications

References 38 publications

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Effect of Co/Ni ratios in cobalt nickel mixed oxide catalysts on methane combustion

Facile protocol for reduction of nitroarenes using magnetically recoverable CoM_0.2Fe_1.8O₄ (M = Co, Ni, Cu and Zn) ferrite nanocatalysts

Contact Info

Product

Resources

About

Mesoporous cobalt ferrite: A rival of platinum catalyst in methane combustion reaction

Cited by 38 publications

References 38 publications

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Synthesis, Characterization of Nanosized ZnCr2O4 and Its Photocatalytic Performance in the Degradation of Humic Acid from Drinking Water

Effect of Co/Ni ratios in cobalt nickel mixed oxide catalysts on methane combustion

Facile protocol for reduction of nitroarenes using magnetically recoverable CoM0.2Fe1.8O4 (M = Co, Ni, Cu and Zn) ferrite nanocatalysts

Contact Info

Product

Resources

About

Facile protocol for reduction of nitroarenes using magnetically recoverable CoM_0.2Fe_1.8O₄ (M = Co, Ni, Cu and Zn) ferrite nanocatalysts