ร400ะC (8)(9)(10)(11). A number of attempts have been made to The promoting effect of Ag 2 O on the physicochemical properties modify the surface properties and catalytic activity of the and catalytic activity of manganese nodules has been investigated. nodules (10, 12, 13); for example, incorporati
Studies on Indian Ocean Manganese Nodules: Part V. Physicochemical Characteristics and Catalytic Activity of Rare Earth Oxide Mixed Manganese Nodules
โ Scribed by K.M. Parida; A.K. Sahoo; N.N. Das
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 139 KB
- Volume
- 183
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
โฆ Synopsis
A series of rare earth oxide mixed manganese nodules (perovskite type mixed oxides) have been prepared by coprecipitation method followed by calcination at 900ยฐC and characterized by different techniques. The effect of rare earth ions on the surface, textural and catalytic activity for the oxidation of CO, and decomposition of H2O2 have been discussed. The activity for CO oxidation followed an order: Pr >/= La > Nd > Yb > Dy > Tb > Sm > Tm > Gd > Eu > Ce.
๐ SIMILAR VOLUMES
In order to activate the naturally occurring material, sam-The effects of acetic acid treatment on the physicochemical ples 075/45 mm were treated with various concentrations properties and catalytic activity of manganese nodules have been (0.1 to 1 M) of acetic acid. About 10 g of the sample was st
The effects of alkali (sodium hydroxide) treatment on the physico-chemical properties and catalytic activity for H 2 O 2 decomposition and CO oxidation of Indian Ocean manganese nodules have been studied. The surface area, surface oxygen, surface hydroxyl groups, etc. increase with alkali treatment