Catalytic acceleration for CO2 decomposition into carbon by Rh, Pt or Ce impregnation onto Ni(II)-bearing ferrite
✍ Scribed by Masamichi Tsuji; Takashi Yamamoto; Yutaka Tamaura; Tatsuya Kodama; Yoshie Kitayama
- Book ID
- 103964453
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 967 KB
- Volume
- 142
- Category
- Article
- ISSN
- 0926-860X
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✦ Synopsis
Catalyzing effects of impregnated Rh, Pt and Ce on Ni(II)-bearing ferrite (NF) activated with H 2 have been studied for CO 2 decomposition to carbon at 300°C. The activation rate of the Rh-or Pt-impregnated NF with H 2 gas was about 1.6 times as large as that of the NF alone at 300°C. At 250°C, the Rh-and Pt-NFs were also activated at 1.6 and 1.3 times higher rates than that of NF control, respectively. The activation of NF was, however, not enhanced by the impregnation of Ce. The rates of CO 2 decomposition using these activated materials were 1.2-3.0 times as large as that of the activated NF. The effect of metal impregnation on the activation and CO 2 decomposition increased in the order of Ce < Pt < Rh. This catalyzing effect is attributed to hydrogen and oxygen spillovers through accelerated dissociations of H 2 and CO 2 molecules, respectively, on the surface of Rh, Pt or Ce deposited on the NF.