Cobalt oxidation with

The presence of 0.3 wt.% Pd on Co-HFER (3 wt.%) catalyst results on a very important increase of low-temperature interaction of CH4 with N02, as a consequence of both the presence Pd species (Pd2+ and PdO) and the cobalt oxides redistribution (formation of Co oxo-cations and decrease of cobalt oxide). With bimetallic catalyst, under oxygen excess conditions, an increase of 30 % in the NOx conversion to N2 is attained. 

Gummow R.J., Liles D.C., Thackeray M.M. and David W.I.F. A reinvestigation of the stmctures of lithium-cobalt-oxides with neutron-diffraction data. Mat. Res. Bull. 1993 28 1177-84. 

Chemical vapor deposition (CVD) was applied to produce homogeneous thin films of pure and doped spinel cobalt oxide with similar morphology on the surface of planar and monolithic supports. The planar substrates were used to investigate the thermal stability and the redox properties of the spinel using temperature-programmed methods monitored by emission-FTIR spectroscopy, while the monolithic substrates were used to test the catalytic performance of the deposited films toward the deep oxidation of methane and to evaluate its durability. The high performance of cobalt oxide to oxidize methane in diluted streams was demonstrated at 500 °C. Furthermore, controlled doping of cobalt oxide layers with suitable cations was demonstrated for nickel as an example, which resulted in substantial increase of electric conductivity. 

The all above results show that highly ordered cubic mesoporous cobalt oxides with crystalline walls can be successfully synthesized with the incipient wetness approach by carefully controlling the amount of added precursor solution and the adding rate. First, this approach results in gradual wetting/loading of precursors into the pore channels and the air within the pore channels can be... 

In summary, highly cubic ordered cobalt oxides with crystalline walls have been synthesized by an accurately controlled incipient wetness approach using mesoporous silica as hard template and cobalt nitrate as the precursors. Compared with the previously reported solution impregnation processes, this technique is facile, time-saving and economical. This technique can be used to synthesize ordered mesoporous metal oxides, and we expect that rvith this approach various kinds of mesoporous oxides or other materials can be synthesized, which may benefits their applications in many areas such as in catalysis, sensors, clean energy and electronics. 

The interaction of the precipitated cobalt oxides with the carbon nanofiber support is influenced to a large extent by heat treatment in an inert atmosphere. Heat treatment of the carbon nanofibers at 573 K resulted in an increase in the interaction between the cobalt particles and the support. Under these conditions a small amount of cobalt carbide and cobalt metal was detected by the XRD and XPS analyses. Heat treatment at 873 K resulted in a further increase in the interaction between the metal and the support leading to increasing amounts of cobalt carbide and cobalt metal. 

Taskin, A.A., Lavrov, A.N., and Ando, Y. (2005) Transport and magnetic properties of GdBaCo20s4. single crystals a cobalt oxide with square-lattice C0O2 planes over a wide range of electron and hole doping, Phys. Rev. B Condens. Matter Mater. Phys., 71 (13), 134414. 

The performance of Ni-MH batteries also depends on the cathode formulation and on the separator characteristics. Higher capacities from 700 to 1,000 Ah/kg are possible using high-performance rare earth elements. Preliminary studies performed on various rare earth materials indicate that an alloy known as VjTi composed of vanadium Vj 5 and titanium Ti2 3 4 has twice the capacity of LaNi. Material scientists believe that addition of cobalt-hydroxide [CofOHlj] to the cathode electrode produces cobalt-oxide with much higher conductivity than nickel-hydroxide (Ni-OOH). Any oxygen evolved at the positive electrode on overcharge... 

Cobalt Oxides with group 2 elements (Mg) Cobalt magnesium oxide... 

Cobalt Oxides with group 3-11 elements (Cr, Fe) Cobalt iron oxide... 

Cobalt Oxides with group 13-15 Cobalt aluminium oxide ( cobalt... 

There are a number of different hthium-ion chemistries now available that involve different positive and negative active materials. Traditionally, the positive active material consisted of hthium cobalt oxide, with some smaU market share going to lithium manganese oxide. Now, cells with positive active materials consisting of lithium nickel cobalt oxide, hthium nickel manganese cobalt oxide, or hthium iron phosphate are available. For the negative, carbons have traditionaUy been used, but... 

A similar chemisorption can take place on other metals which do not form a nitride from N2. The much lower ability of other metals to chemisorb N2 seems to come primarily from the difficulty in activating the N2 molecule. Even a copper surface can chemisorb N2 when the copper surface is activated by ion bombardment [34], even though copper nitride, CU3N, is unstable. Chemisorption of N2 was found on reduced cobalt oxide with a potassium oxide promoter at room temperature [35, 36] and even on noble metals (Ru, Rh,... 

Since the early 1980s there have been several catalyst developments, including the use of cobalt oxide with magnetite to increase activity. The most significant, however, is the successful use of a mthenium catalyst supported on a special carbon and promoted with cesium and barium. Although still expensive, cost and availability should not restrict the use of mthenium in the way that osmium was excluded by Bosch, provided that the metal is recycled. 

Kohl and Marincek [4, 5] studied the reaction of iron oxide, nickel oxide, and cobalt oxide with graphite over the temperature range 920-1200°C but used a rather simple rate expression for the interpretation of their data. 

Replacement of graphite and of lithium cobalt oxide with alternative, higher capacity, lower cost anode and cathode materials ... 

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