Authors:Yong Han, Peng Yang, Jun Li, Cong Qiao, and Tian Li
decreases with increasing solvent polarity.
Moreover, the reactionkinetics obeys a second-order rate law in toluene, butyl acetate, cyclohexanone and pyridine, but a first-order rate law is valid in NMP and DMF, and there is no distinction for the
Hydrogen phosphate (HPO42−) or poly(acrylic acid) (PAA) stabilized cobalt(0) nanoclusters were in situ generated from the reduction of cobalt(II) chloride during the catalytic hydrolysis of sodium borohydride (NaBH4) in the presence of stabilizers, HPO42− or PAA. Cobalt(0) nanoclusters stabilized by HPO42− or PAA were characterized by using UV–Visible spectroscopy, TEM, XPS and FT-IR techniques. They were employed as catalysts in the hydrolysis of NaBH4 to examine the effect of stabilizer type on their catalytic activity and stability. Detailed reaction kinetics of the hydrolysis of NaBH4 in the presence of both catalysts was studied depending on catalyst concentration, substrate concentration and temperature. PAA stabilized cobalt(0) nanoclusters provided higher total turnover number (TTON = 6,600) than that of HPO42− stabilized cobalt(0) nanoclusters (1,285 turnovers). However, the HPO42− stabilized cobalt(0) nanoclusters provided a lower activation energy (Ea = 53 ± 2 kJ mol−1) than the PAA stabilized cobalt(0) nanoclusters (Ea = 58 ± 2 kJ mol−1) for the hydrolysis of NaBH4. The use of two types of stabilizers in the preparation of the same metal(0) nanoclusters following the same methodology enables us to compare the electrostatic and steric stabilization in terms of the catalytic activity and stability of metal(0) nanoclusters.
Authors:Jian-Zhong Guo, Zhao-Yin Hou, and Xiao-Ming Zheng
in the journal last year ( ReactionKinetics, Mechanisms and Catalysis , 2010 , 101, 129–140; DOI 10.1007/s11144-010-0210-2 ).
After the publication of the paper, the following facts became obvious to the editors.
, T.P. , KAMMAN , J. ( 1983 ): Reactionkinetics and accelerated tests simulation as a function of temperature . -in: SAGUY , I. (Ed.) Applications of computers in food research , Marcel Dekker , New York . Chapter 4
Authors:Gy. Pátkai, I. Körmendy, and A. Körmendy-Domján
reakciókinetikai megközelítés . (Research results in 1998 and new approach to modell reactionkinetics of vitamin C decomposition.) Research report, project OTKA T 014965, task: 2.4. Szent István University, Faculty of Food Science, Department of Canning
the reactionkinetics occurring on a uniform surface and single sites, we have recently analyzed a simple reaction scheme of N 2 O decomposition running in the presence of oxygen on Fe [ 4 ]. In this study, we treat a much more complex reaction