The Relative Catalytic Activity of Nickel Produced by the Reduction of Nickel (II) Bromide with Liquid Ammonia Solutions of Different Alkali Metals1

1953 ◽  
Vol 75 (7) ◽  
pp. 1760-1761 ◽  
Author(s):  
George W. Watt ◽  
Peggy I. Mayfield
Keyword(s):  
Catalytic Activity ◽  
Liquid Ammonia ◽  
Relative Catalytic Activity

The Catalytic Activity of Metals Produced by the Reduction of Salts in Liquid Ammonia. III. Ruthenium, Rhodium and Palladium1

1954 ◽  
Vol 76 (23) ◽  
pp. 5989-5993 ◽  
Author(s):  
George W. Watt ◽  
Archie Broodo ◽  
W. A. Jenkins ◽  
S. G. Parker
Keyword(s):  
Catalytic Activity ◽  
Liquid Ammonia

The relative catalytic activity of acids in hydrolytic caprolactam polymerization

1973 ◽  
Vol 5 (3) ◽  
pp. 339-340
Author(s):  
L. N. Mizerovskii ◽  
Yu. S. Paikachev ◽  
B. G. Silanteva ◽  
N. V. Sholichev
Keyword(s):  
Catalytic Activity ◽  
Caprolactam Polymerization ◽  
Relative Catalytic Activity

DECOMPOSITION OF SODIUM HYPOCHLORITE: THE CATALYZED REACTION

1956 ◽  
Vol 34 (4) ◽  
pp. 479-488 ◽  
Author(s):  
M. W. Lister
Keyword(s):  
Catalytic Activity ◽  
Sodium Hypochlorite ◽  
Small Extent ◽  
Copper Oxides ◽  
Iron Cobalt ◽  
First Order ◽  
Cobalt Nickel ◽  
Nickel Copper ◽  
Relative Catalytic Activity ◽  
Mechanism Of The Reaction

The catalyzed decomposition of sodium hypochlorite has been examined; the catalysts tried were manganese, iron, cobalt, nickel, and copper oxides. It was shown that in no case was the decomposition to chlorate and chloride accelerated, only the reaction to chloride and oxygen. Manganese and iron did not catalyze even the latter reaction, or only to a very small extent; this was in fairly concentrated sodium hypochlorite containing some sodium hydroxide. The manganese and iron are largely oxidized to permanganate and ferrate under these conditions. It was found that copper could catalyze the formation of permanganate and ferrate, and nickel the formation of permanganate. Cobalt catalyzed the reaction going to oxygen, and the rate was proportional to the cobalt added, but little dependent on the hypochlorite concentration; the same is true of nickel. Copper (as reported earlier) gives a catalyzed reaction not far from first order in hypochlorite. The activation energies were measured, and were consistent with the relative catalytic activity of these metals. The mechanism of the reaction is briefly discussed.

Complex iron catalytic systems: relative catalytic activity of various components

1994 ◽  
Vol 8 (1) ◽  
pp. 53-55 ◽  
Author(s):  
Malvina Farcasiu ◽  
Patricia A. Eldredge ◽  
Steven C. Petrosius
Keyword(s):  
Catalytic Activity ◽  
Catalytic Systems ◽  
Relative Catalytic Activity

The Catalytic Activity of Metals Produced by the Reduction of Salts in Liquid Ammonia. II. Nickel1

1951 ◽  
Vol 73 (12) ◽  
pp. 5791-5793 ◽  
Author(s):  
George W. Watt ◽  
Wilbur F. Roper ◽  
Sidney G. Parker
Keyword(s):  
Catalytic Activity ◽  
Liquid Ammonia

High resolution electron microscopy of lanthanum phosphate crystals

1978 ◽  
Vol 36 (1) ◽  
pp. 274-275
Author(s):  
J. C. Wheatley ◽  
J. M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
High Resolution ◽  
Petroleum Industry ◽  
High Resolution Electron Microscopy ◽  
Lanthanum Phosphate ◽  
Good Catalyst ◽  
Resolution Electron ◽  
Good Catalytic Activity ◽  
Physical And Chemical

Rare-earth phosphates are of particular interest because of their catalytic properties associated with the hydrolysis of many aromatic chlorides in the petroleum industry. Lanthanum phosphates (LaPO4) which have been doped with small amounts of copper have shown increased catalytic activity (1). However the physical and chemical characteristics of the samples leading to good catalytic activity are not known.Many catalysts are amorphous and thus do not easily lend themselves to methods of investigation which would include electron microscopy. However, the LaPO4, crystals are quite suitable samples for high resolution techniques.The samples used were obtained from William L. Kehl of Gulf Research and Development Company. The electron microscopy was carried out on a JEOL JEM-100B which had been modified for high resolution microscopy (2). Standard high resolution techniques were employed. Three different sample types were observed: 669A-1-5-7 (poor catalyst), H-L-2 (good catalyst) and 27-011 (good catalyst).

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