Grams Jacek
Institute of General and Ecological Chemistry, Technical University of Lodz, ul. Zeromskiego 116, Lodz, Poland.
Eur J Mass Spectrom (Chichester). 2010;16(3):453-61. doi: 10.1255/ejms.1079.
The aim of this paper was to present potentialities of time-of-flight secondary ion mass spectrometry (ToF- SIMS) in the studies of heterogeneous catalysts. The results of ToF-SIMS investigations of Co/Al2O3, Mo/Al2O3, Co-Mo/Al2O3, Au/Al2O3, Pt/TiO2 and Pd/TiO2 systems were described. It was demonstrated that, in this case, an application of ToF-SIMS makes possible the determination of surface composition of investigated catalysts (including an identification of surface contaminants), characterization of interactions between an active phase and support, estimation of active phase dispersion on the analyzed surface, comparison of the degree of metal oxidation after treatment of the catalyst in different conditions, investigation of catalyst deactivation processes (formation of new chemical compounds, adsorption of various impurities and poisons on the catalyst surface) and determination of organic precursors of catalysts.
本文旨在介绍飞行时间二次离子质谱（ToF-SIMS）在多相催化剂研究中的潜力。描述了对Co/Al2O3、Mo/Al2O3、Co-Mo/Al2O3、Au/Al2O3、Pt/TiO2和Pd/TiO2体系进行ToF-SIMS研究的结果。结果表明，在这种情况下，应用ToF-SIMS可以确定所研究催化剂的表面组成（包括识别表面污染物），表征活性相与载体之间的相互作用，估计活性相在分析表面上的分散度，比较催化剂在不同条件下处理后金属的氧化程度，研究催化剂失活过程（新化合物的形成、各种杂质和毒物在催化剂表面的吸附）以及确定催化剂的有机前驱体。
