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전이금속이 첨가된 Raney Ni의 촉매활성에 관한 연구
A Study on the Catalytic Activity of Raney Ni Doped with Transition Metals
HWAHAK KONGHAK, April 1993, 31(2), 244-253(10), NONE
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Abstract
Raney Ni 촉매의 전이금속 첨가효과를 벤젠의 수소화 반응과 촉매내에 저장되어 있는 수소량 측정을 통하여 알아보았다. Dopant 중 Ti이 첨가된 촉매의 촉매능이 가장 우수하였다. 이 때 Ti 첨가량은 1.5wt%가 가장 좋았으나, 전극성능 실험에서는 2.0wt% Ti이 가장 적절하였다. EDS분석결과 첨가한 Ti은 촉매표면에 주로 존재하였다. Raney Ni제조시 Al용출 메카니즘은 선택적인 용출이었다. Raney Ni의 촉매활성은 수소 전처리 온도에 의해서 영향받았으며, 5wt%의 PTFE혼합으로 촉매입자가 효과적으로 분산되었다.
Doping effect of transition metals in Raney Ni catalyst was investigated by measuring of benzene hydrogenation activity and hydrogen content stored inside the catalyst. The catalyst doped with Ti showed the best catalytic activity of all among the used dopants, and the optimum Ti content in a starting alloy was 1.5wt%, and for the electrochemical reaction it was 2.0wt%. Surface analysis by means of EDS revealed that most of doped Ti was concentrated on the surface of catalyst. The Al leaching mechanism from Raney alloy was selective dissolution. The catalytic activity of Raney Ni was affected cconsiderably by hydrogen pretreatment temperature, and the adequate PTFE content for dispersing catalyst particles was 5wt%.
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Bond GC, Surf. Sci., 8, 11 (1969)
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Freel J, Pieters WJM, Anderson RB, J. Catal., 16, 281 (1970)
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Nicolau I, Anderson RB, J. Catal., 68, 339 (1981)
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Orchard JP, Tomsett AD, Waiwright MS, Young DJ, J. Catal., 84, 189 (1983)
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Mund K, Richter G, VonSturm F, J. Electrochem. Soc., 124, 1 (1977)
Ewe H, Justi E, Schmitt A, Electrochim. Acta, 19, 799 (1974)
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Kenjo T, Electrochim. Acta, 31(12), 1617 (1986)
Lohrberg K, Kohl P, Electrochim. Acta, 29(11), 1557 (1984)
