Effect of Rapid Quenching Speed on the Structure and Catalytic Properties of the Skeletal Ni Catalysts

Abstract

Abstract: A series of rapidly quenched skeletal Ni catalysts were prepared by alkali leaching of Ni-Al alloys solidified at different cooling rates. It has been found that the higher cooling rate leads to more residual Ni₂Al₃ phase, lower surface area, larger average pore size and porosity, smaller mean crystallite size, larger unit-cell parameter and more uniform active site. The relationship between the structure and catalytic behavior of the rapidly quenched skeletal Ni was discussed by using cinnamaldehyde selective hydrogenation as the probe reaction.

Key words: Rapid quenching, Cooling rate, Raney Ni, Cinnamaldehyde, Selective hydrogenation

CLC Number:

O643.1

TrendMD:

HU Hua-Rong, FANG Jing, QIAO Ming-Hua, YAN Shi-Run, FAN Kang-Nian, LI He-Xing, ZONG Bao-Ning, ZHANG Xiao-Xin. Effect of Rapid Quenching Speed on the Structure and Catalytic Properties of the Skeletal Ni Catalysts[J]. Chem. J. Chinese Universities, 2005, 26(7): 1317.

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Effect of Rapid Quenching Speed on the Structure and Catalytic Properties of the Skeletal Ni Catalysts

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