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http://nopr.niscpr.res.in/handle/123456789/46535| Title: | Infrared spectral characteristics of metal-support interactions in Ni-Silica catalysts |
| Authors: | Babu, G P Basrur, A G Bhat, A N Murthy, R S |
| Issue Date: | Nov-1990 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The precipitation of nickel hydroxy carbonate on silica has been carried out using NiSO4 and Na2CO3 under varying conditions of temperature and pH. Thermal and infrared studies show a shift of carbonate rich to hydroxide-rich composition as the severity of precipitation medium increases. The doublet band at 1050 and 1000 cm-1 in the IR spectrum of silica-supported nickel catalyst is assigned to the silicate species bonded to Ni-O-C-O and Ni-O-H groups respectively. The IR spectra of samples with high CO / (OH)  ratio exhibit a strong band at 1050cm-1; this disappears more rapidly compared to the band at 1000 cm-1 when the reduction temperature is increased from 200 to 450°C. Therefore, a strong interaction between Ni(OH)2 and silicate species is supported by infrared studies. |
| Page(s): | 1094-1097 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.29A(11) [November 1990] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 29A(11) 1094-1097.pdf | 786.15 kB | Adobe PDF | View/Open |
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