Fierro-Gonzalez Juan C, Gates Bruce C
Department of Chemical Engineering and Materials Science, University of California, Davis, California 95616, USA.
Langmuir. 2005 Jun 21;21(13):5693-5. doi: 10.1021/la0506574.
Mononuclear gold complexes synthesized from AuIII(CH3)2(acac) in zeolite NaY were characterized by time-resolved X-ray absorption spectroscopy and infrared spectroscopy as they catalyzed CO oxidation at 298 K and 760 Torr in flow systems. Initial contact with a CO + O2 mixture led to the rapid formation of cationic gold complexes in which Au was bonded to approximately two zeolite O atoms, on average. Further contact with CO + O2 led to breaking of an Au-surface oxygen bond, giving a gold carbonyl anchored to approximately one O atom. The process was reversed in the absence of CO and O2.
由AuIII(CH3)2(acac)在沸石NaY中合成的单核金配合物，在流动体系中于298 K和760 Torr下催化CO氧化时，通过时间分辨X射线吸收光谱和红外光谱进行了表征。最初与CO + O2混合物接触导致阳离子金配合物迅速形成，其中Au平均与大约两个沸石O原子键合。进一步与CO + O2接触导致Au-表面氧键断裂，形成锚定在大约一个O原子上的金羰基化合物。在没有CO和O2的情况下，该过程会逆转。
