On the nature of the'heterogeneous' catalyst: Nickel-on-charcoal

…, W Chrisman, B Spliethoff, B Tesche

Index: Lipshutz, Bruce H.; Tasler, Stefan; Chrisman, Will; Spliethoff, Bernd; Tesche, Bernd Journal of Organic Chemistry, 2003 , vol. 68, # 4 p. 1177 - 1189

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Citation Number: 140

Abstract

Results from aromatic aminations and Kumada couplings, together with spectroscopic analyses (TEM, EDX, ICP-AES, React-IR), reveal that catalysis using nickel-on-charcoal (Ni/C) is most likely of a homogeneous rather than heterogeneous nature. In the course of a reaction with Ni/C, nickel bleed from the support was calculated to be as high as 78%. However, the existence of an equilibrium for this homogeneous species between nickel ...