Lanthanum nickel oxide

Therefore, many researches were performed to examine the influence of lanthanum substitution in the A site of the perovskite by difierent cations. Rynkow-ski et al. [29] showed that a small amount of strontium in the perovskite-Uke K2Nip4 oxide La2- Sr,cNi04 slightly decreases the catalytic activity but improves the stability of the catalyst. XRD analysis revealed the presence of SrCOs for X = 0.25 and 0.5 proving that the accommodation of strontium in the structure of the lanthanum nickel oxide is not complete, even after a calcination step at... 

La2Ni, Lanthanum nickel oxide (La2Ni04), (12031-41-3], 30 133 O4PVC6H5.2H2O, Vanadium,... 

In this special field, earlier work had been done in other laboratories, such as by the Schering Company, Berlin (36), and by Ipatieff (37) in connection with his work on the hydrogenation of camphor and of other organic compounds. At both places, the favorable effect of alkali oxides and earth alkali oxides on nickel, cobalt and copper has been investigated. Similarly, Paal and his coworkers (38) have used a palladium-aluminum hydroxide catalyst in 1913 for the hydrogenation of double bonds. Bedford and Erdman (39) had reported that the catalytic action of nickel oxide is enhanced by the oxides of aluminum, zirconium, titanium, calcium, lanthanum, and magnesium. 

Also for cathodic oxygen reduction in low-temperature fuel cells, platinum is indispensible as a catalyst whereas the cathodic electrocatalysts in MCFCs and SOFCs are lithiated nickel oxide and lanthanum-manganese per-ovskite, respectively. Appleby and Foulkes in the Fuel Cell Handbook (101) reviewed the fundamental work as well as the technologically important publications covering electrocatalysis in fuel cells till 1989. 

Pengnian, H. et al.. Interfacial reaction between nickel oxide and lanthanum gallate during sintering and its effect on conductivity, J. Am. Ceram. Soc., 82, 2402-2406 (1999). 

Platinum is an effective oxidation catalyst for carbon monoxide and the complete oxidation of hydrocarbons. Palladium also promotes the oxidation of carbon monoxide and hydrocarbons but is more sensitive to poisoning than platinum in the exhaust environment. Both platinum and palladium promote the reduction of nitric oxide but are less effective than rhodium. In addition to the noble metals, three-way catalysts contain the base metal cerium and possibly other additives such as lanthanum, nickel or iron. These base metal additives are believed to improve catalyst performance by extending conversion during the rapid air-fuel ratio perturbations and help to stabilize the alumina support against thermal degradation. 

All three layers, namely porous anode, electrolyte, and cathode, were manufactured from agglomerated ceramic powder ZxOi + 8 mol.% Y2O3 with a crystallite size from 10 to 20 nm. The anode and cathode materials were doped with 50 wt.% nickel oxide and 50 wt.% lanthanum manganate, respectively. Taking into account that the sintered electrolyte material should be gas-tight... 

Lithium hydroxide Lithium hydroxide monohydrate 215-185-5 AS-9600 DWS 1016 DWS 1017A pHreeGUARD 1215C pHreeGUARD 2350 Sodium hydroxide Unichem SOHYD 215-193-9 Indium oxide 215-197-0 Potassium sulfide 215-199-1 Potassium silicate Trasol KA-L Trasol KA-N Trasol KC-K Trasol KD-K 215-200-5 Lanthanum oxide 215-202-6 Manganese dioxide 215-204-7 Charmax MO Molybdenum trioxide Molyhibit POM POC Polu-U 215-208-9 Sodium oxide 215-211-5 Sodium polysulfide Sodium sulfide 215-213-6 Niobium oxide 215-215-7 Nickel oxide (ous)... 

The electronic conductors commonly used for SOFCs are lanthanum strontium manganite (LSM) for cathodes and nickel metal for anodes. The anodes are prepared in situ by reduction of a nickel oxide/ electrolyte composite. 

Lanthanum nickel-iron oxide cathodes, La(Ni,Fe)03, have attracted much attention because they show essentially no effects of chromium poisoning [59]. This is mainly because there is no chance of SrCr04 formation. From the thermodynamic point of view, there is a possibility that the La(Ni,Fe)03 perovskites react with chromium-containing vapors to form the La(Ni,Fe,Cr)03 solid solution [42]. Even so, such perovskites must still be electro-conductive, although some surface kinetic activity will be lowered due to the fact that lanthanum chromite has lower catalytic activity among the transition metal perovskite oxides. 

The anode of the lightweight SOFC is made from Nickel oxide (NiO) and yttria-stabilized zirconia. For the electrolyte, yttria-stabUized zirconia is also used, while the cathode is made from lanthanum strontium manganite (LSM) (cf. previous section). The same material is used for the contact layer. Lanthanum strontium chromite is applied as a ceramic protective coating for chromium retention. The noble gas argon is used as an auxiliary medium in the vacuum plasma spraying process [71]. 

EEI has used both commercially sintered silver powder with 1-mm-thick electrodes and sintered silver powder with in-house electrodes made from an ABj-type metal-hydride alloy (also known as lanthanum-nickel alloy) using rare earth material for initial laboratory cell test evaluations. Introduction of rare earth material improves the oxidation resistance during the alloy manufacturing process. The ABj-type metal-hydride alloy should be widely used in sealed Ni-MH batteries. The use of rare earth metal lanthanum will provide improved electrical performance, enhanced reliability, and ultra-high longevity for the sealed Ni-MH and Ag-MH battery systems. 

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