Carlsson Per-Anders, Zhdanov Vladimir P, Skoglundh Magnus
Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96, Göteborg, Sweden.
Phys Chem Chem Phys. 2006 Jun 21;8(23):2703-6. doi: 10.1039/b602958b. Epub 2006 May 12.
Isothermal self-sustained kinetic oscillations in CO oxidation over silica-supported Pt at near-atmospheric pressure were studied by combined in situ Fourier transform infrared spectroscopy and mass spectrometry. The use of a specially designed reactor and careful choice of the physical properties of the catalyst and reaction conditions made it possible to eliminate diffusion limitations, to determine the maximum CO oxidation rate per Pt site in the purely kinetic regime and to clarify the mechanism of the oscillations. Specifically, our results indicate that during the high reactive periods the reaction mainly occurs on the oxide surface.
通过原位傅里叶变换红外光谱和质谱联用技术，研究了近常压下二氧化硅负载的铂上一氧化碳氧化过程中的等温自持动力学振荡。使用专门设计的反应器，并仔细选择催化剂的物理性质和反应条件，使得消除扩散限制、确定纯动力学区域中每个铂位点的最大一氧化碳氧化速率以及阐明振荡机制成为可能。具体而言，我们的结果表明，在高反应期，反应主要发生在氧化物表面。
