Microwave synthesis of catalyst spinel MnCo2O4 for alkaline fuel cell

Nissinen, Terhi; Valo, Taina; Gasik, Michael; Rantanen, Jyri; Lampinen, Markku J.

doi:10.1016/s0378-7753(01)01049-7

Cited by 51 publications

(35 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Materials Synthesis : MnCo 2 O 4 cubic spinels were synthesized by a modified conventional solid‐state chemistry method with Mn(NO 3 ) 2 and Co(NO 3 ) 2 as precursors. The synthesis reaction was performed at various temperatures (400, 500, 700, and 900 °C) to prepare MnCo 2 O 4 oxides with different physical properties.…”

Section: Methodsmentioning

confidence: 99%

Cations in Octahedral Sites: A Descriptor for Oxygen Electrocatalysis on Transition‐Metal Spinels

Wei

Feng

Scherer³

et al. 2017

Advanced Materials

637

621

View full text Add to dashboard Cite

Exploring efficient and low-cost electrocatalysts for the oxygen-reduction reaction (ORR) and oxygen-evolution reaction (OER) is critical for developing renewable energy technologies such as fuel cells, metal-air batteries, and water electrolyzers. A rational design of a catalyst can be guided by identifying descriptors that determine its activity. Here, a descriptor study on the ORR/OER of spinel oxides is presented. With a series of MnCo O , the Mn in octahedral sites is identified as an active site. This finding is then applied to successfully explain the ORR/OER activities of other transition-metal spinels, including Mn Co O (x = 2, 2.5, 3), Li Mn O (x = 0.7, 1), XCo O (X = Co, Ni, Zn), and XFe O (X = Mn, Co, Ni). A general principle is concluded that the e occupancy of the active cation in the octahedral site is the activity descriptor for the ORR/OER of spinels, consolidating the role of electron orbital filling in metal oxide catalysis.

show abstract

Section: Methodsmentioning

confidence: 99%

Cations in Octahedral Sites: A Descriptor for Oxygen Electrocatalysis on Transition‐Metal Spinels

Wei

Feng

Scherer³

et al. 2017

Advanced Materials

637

621

View full text Add to dashboard Cite

show abstract

“…Co 2 MnO 4 powder were prepared using conventional methods 3 Characterization Powder XRD data were collected on a Shimadzu XRD-6000 diffractometer with Cu Kα radiation (40 kV, 30 mA, and λ = 0.154 nm). SEM images and Energy dispersive X-ray spectroscopy (EDS) elemental analysis were obtained using a Zeiss Supra 55 scanning electron microscope.…”

Section: Preparation Of Samples For Comparison Experiments the Pure Cmentioning

confidence: 99%

Well-dispersed Co3O4/Co2MnO4 nanocomposites as a synergistic bifunctional catalyst for oxygen reduction and oxygen evolution reactions

et al. 2013

View full text Add to dashboard Cite

show abstract

“…MnCo 2 O 4 lies on the normal spinel family that consists of Mn 2+ ions in tetrahedral sites, Co 3+ ions in the octahedral sites and O −2 ions tend to coordinate both positions to frame the face centred cubic structure 32 . Besides sensors, MnCo 2 O 4 has been widely utilized in alkaline fuel cells 33 , solid oxide fuel cells 34 , water treatment 35 and glucose sensors 36 . In this work, we have demonstrated the synthesis of porous MnCo 2 O 4 by simple chemical route at the low processing temperature.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Porous MnCo2O4 for Electrochemical Determination of Cadmium ions in Water Samples

Velmurugan¹,

Chen²

2017

Sci Rep

View full text Add to dashboard Cite

To utilize the maximum activity of nanomaterials, it was specifically synthesized by appropriate physicochemical properties. In that aspect, we have described the synthesis of porous MnCo2O4 by simple chemical route and applied for the selective detection of cadmium (Cd (II)). The as-prepared porous MnCo2O4 was characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) adsorption isotherm, X-ray diffraction pattern analysis (XRD), Fourier transform infra-red spectroscopy (FT-IR), energy dispersive X-ray (EDX) and electrochemical techniques. The porous MnCo2O4 exhibited an excellent electrochemical behaviour and good analytical response towards the determination of Cd (II). Those analytical factors such as pH, deposition potential and deposition time are optimized by using differential pulse anodic stripping voltammetry (DPASV). A wide linear concentration range from 2.3 to 120 µg L−1, limit of detection (LOD) of 0.72 µg L−1 and the limit of quantification (LOQ) of 0.91 µg L−1 were achieved for determination of Cd (II). The selectivity of the developed sensor was explored in the presence of co-interfering ions. Also our sensor exhibits a good stability, reproducibility and repeatability. In addition, the practicability of proposed sensor was evaluated for the detection of Cd (II) in real water samples.

show abstract

Microwave synthesis of catalyst spinel MnCo2O4 for alkaline fuel cell

Cited by 51 publications

References 22 publications

Cations in Octahedral Sites: A Descriptor for Oxygen Electrocatalysis on Transition‐Metal Spinels

Cations in Octahedral Sites: A Descriptor for Oxygen Electrocatalysis on Transition‐Metal Spinels

Well-dispersed Co3O4/Co2MnO4 nanocomposites as a synergistic bifunctional catalyst for oxygen reduction and oxygen evolution reactions

Synthesis and Characterization of Porous MnCo2O4 for Electrochemical Determination of Cadmium ions in Water Samples

Contact Info

Product

Resources

About