Rational design and synthesis of NixCo3−xO4 nanoparticles derived from multivariate MOF-74 for supercapacitors

2015 ◽  
Vol 3 (40) ◽  
pp. 20145-20152 ◽  
Author(s):  
Siru Chen ◽  
Ming Xue ◽  
Yanqiang Li ◽  
Ying Pan ◽  
Liangkui Zhu ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Rational Design ◽  
Mixed Metal Oxide ◽  
Oxide Materials ◽  
Mixed Metal ◽  
Design And Synthesis ◽  
Metal Ratio

Multivariate mixed-metal oxide materials derived from multivariate MOF-74 crystals showed the highest capacitance for supercapacitors when the Ni/Co metal ratio reached 1 : 1.

Stability of Mesoporous Oxide and Mixed Metal Oxide Materials under Biologically Relevant Conditions

2007 ◽  
Vol 19 (17) ◽  
pp. 4349-4356 ◽  
Author(s):  
John D. Bass ◽  
David Grosso ◽  
Cédric Boissiere ◽  
Emmanuel Belamie ◽  
Thibaud Coradin ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Mixed Metal Oxide ◽  
Oxide Materials ◽  
Mixed Metal ◽  
Biologically Relevant ◽  
Mesoporous Oxide

scholarly journals In Situ Raman Spectroscopy as a Tool for Discerning Subtle Structural Differences between Commercial (Ce,Zr)O2-Based OSC Materials of Identical Composition

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 462
Author(s):  
Chrysanthi Andriopoulou ◽  
Deb Harris ◽  
Hazel Stephenson ◽  
Angelos M. Efstathiou ◽  
Soghomon Boghosian
Keyword(s):  
Raman Spectroscopy ◽  
Metal Oxide ◽  
Raman Spectra ◽  
Mixed Metal Oxide ◽  
Oxide Materials ◽  
In Situ Raman Spectroscopy ◽  
Aqueous Chemistry ◽  
Mixed Metal ◽  
In Situ Raman

In situ Raman spectroscopy was used at temperatures in the 50–480 °C range under oxidizing (20% O2/He) and reducing (5% H2/He) flowing gas atmospheres to compare the spectra obtained for a series of industrial rare earth doped CexZr1−xO2−δ oxygen storage capacity (OSC) mixed metal oxide materials of identical at % composition, which were prepared by the same chemical synthesis route, in which one synthesis parameter of the aqueous chemistry was slightly varied. The Raman fingerprint of the anionic sublattice is very sensitive to O atom relocations within the bulk of the material matrix and to the pertinent defect topology in each case. A protocol of sequential Raman measurements and analysis was proposed to discern subtle differences between the oxygen vacancy and defect topologies of the examined materials. It can be concluded that for two materials under comparison for their structures, identical Raman spectra are obtained only if the procedures followed for their preparation are identical; a slight variation of one single parameter (e.g., in the aqueous chemistry stage) results in discernible differences in the Raman spectra. The proposed procedure can serve as a tool for proving or disproving infringement of IPR (Intellectual Property Rights) protected preparation methods of ceria-based mixed metal oxide materials.

Demonstration of Mixed Metal Oxide Cathode Materials in Prismatic Li-ion Cells

1997 ◽  
Vol 496 ◽  
Author(s):  
G. M. Ehrlich ◽  
R. L. Gitzendanner
Keyword(s):  
Metal Oxide ◽  
Cathode Materials ◽  
High Capacity ◽  
Rate Capability ◽  
Cell Voltage ◽  
High Energy ◽  
Mixed Metal Oxide ◽  
Oxide Materials ◽  
Mixed Metal ◽  
Li Ion

AbstractRecent advances in mixed metal oxide (LiNi1−xCoxO2) cathode materials for lithium ion (Li-ion) batteries have resulted in a new generation of high capacity cathode materials. High capacity materials are particularly useful for applications where either volume or weight is limited, such as in space applications. These applications also benefit from cell chemistries with high energy efficiency as this permits reduced ancillary energy storage and dissipation apparatus. Mixed metal oxide materials have been evaluated and demonstrated in prismatic Li-ion cells. The capacity of the mixed metal oxide materials is exceptional, reversible capacity of 160mAh/g is demonstrated although the cell voltage is lower than when LiCoO2 materials are used, 3.58V vs. 3.74V, at low (0.5mA/cm2) discharge rates. The high capacity results in a significant improvement in specific energy, further, the sloping discharge curve characteristic of the mixed metal oxide materials facilitates determination of the state of charge based on cell voltage. The design of composite cathode materials using the mixed metal oxide materials has a significant influence on the cell impedance and the rate capability of the material. Results describing the rate capability of these materials is presented.

Bimetallic Mixed Metal Oxide (CuO/NiO) In Fusion with Nitrogen-doped Graphene Oxide: An Alternate Approach for Developing Potential Biocarrier

2021 ◽  
pp. 105781
Author(s):  
Periasamy Anbu ◽  
Subash C.B. Gopinath ◽  
Kandasamy Saravanakumar ◽  
Sekar Vijayakumar ◽  
Santheraleka Ramanathan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Oxide ◽  
Mixed Metal Oxide ◽  
Mixed Metal ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene

Rare earth—platinum group mixed metal oxide systems

1994 ◽  
Vol 210 (1-2) ◽  
pp. 177-184 ◽  
Author(s):  
K.M. Cruickshank ◽  
F.P. Glasser
Keyword(s):  
Rare Earth ◽  
Metal Oxide ◽  
Mixed Metal Oxide ◽  
Oxide Systems ◽  
Mixed Metal ◽  
Platinum Group

scholarly journals Y3+ and Sm3+ co-doped mixed metal oxide nanocomposite: Structural, electrochemical, photocatalytic, and antibacterial properties

2021 ◽  
Vol 4 ◽  
pp. 100085 ◽  
Author(s):  
Karthik Kannan ◽  
D Radhika ◽  
D. Gnanasangeetha ◽  
L. Sivarama Krishna ◽  
K Gurushankar
Keyword(s):  
Metal Oxide ◽  
Antibacterial Properties ◽  
Mixed Metal Oxide ◽  
Mixed Metal ◽  
Co Doped

scholarly journals Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 354
Author(s):  
Khadijah H. Alharbi ◽  
Ali Alsalme ◽  
Ahmed Bader A. Aloumi ◽  
Mohammed Rafiq H. Siddiqui
Keyword(s):  
Metal Oxide ◽  
Calcination Temperature ◽  
Aging Time ◽  
Metal Oxide Nanoparticles ◽  
Catalytic Performance ◽  
Molar Ratio ◽  
Mixed Metal Oxide ◽  
Toluene Oxidation ◽  
Mixed Metal ◽  
Selective Catalytic Oxidation

Oxidation is an important organic transformation, and several catalysts have been reported for this conversion. In this study, we report the synthesis of mixed metal oxide CuxZnyO, which is prepared by a coprecipitation method by varying the molar ratio of Cu and Zn in the catalytic system. The prepared mixed metal oxide CuxZnyO was evaluated for catalytic performance for toluene oxidation. Various parameters of the catalytic evaluation were studied in order to ascertain the optimum condition for the best catalytic performance. The results indicate that aging time, calcination temperature, reaction temperature, and feed rate influence catalytic performance. It was found that the catalyst interfaces apparently enhanced catalytic activity for toluene oxidation. The XRD diffractograms reveal the crystalline nature of the mixed metal oxide formed and also confirm the coexistence of hexagonal and monoclinic crystalline phases. The catalyst prepared by aging for 4 h and calcined at 450 °C was found to be the best for the conversion of toluene to benzaldehyde while the reactor temperature was maintained at 250 °C with toluene fed into the reactor at 0.01 mL/min. The catalyst was active for about 13 h.

Doped-TiO2 and doped-mixed metal oxide-based nanocomposite for photocatalysis

2021 ◽  
pp. 155-180
Author(s):  
Akash P. Bhat ◽  
Ananda J. Jadhav ◽  
Chandrakant R. Holkar ◽  
Dipak V. Pinjari
Keyword(s):  
Metal Oxide ◽  
Mixed Metal Oxide ◽  
Doped Tio2 ◽  
Mixed Metal
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