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化学吸附在多相催化研究中占有非常重要的地位。这是因为多相催化反应是多步骤过程,其中某些步骤是在吸附相中进行的。分子在吸附相中的行为决定着催化过程的本质。多相催化反应的实现要通过五个连续的步骤,1.反应物向催化剂表面扩散;2.反应物在催化剂表面上吸附;3.在吸附层中进行表面反应;4.反应生成物由催化剂表面上脱附;5.生成物扩散以离开邻近催化剂的表面区。这五个步骤中的每一步,都有其独特的规律性,而且对整个催化反应过程有不同程度的影响。因此,在研究催化反应机理时,应了解每一
Chemisorption plays a very important role in heterogeneous catalysis. This is because heterogeneous catalytic reactions are multi-step processes, some of which are carried out in the adsorbed phase. The behavior of molecules in the adsorptive phase determines the nature of the catalytic process. The heterogeneous catalytic reaction is achieved through five consecutive steps, 1. the reactant is diffused to the catalyst surface; 2. the reactant is adsorbed on the catalyst surface; 3. the surface is reacted in the adsorbent layer; 4. the reaction product is formed from the catalyst Surface desorption; 5 products spread to leave the surface area adjacent to the catalyst. Each of these five steps has its own unique regularity and has varying degrees of impact on the overall catalytic reaction. Therefore, in studying the catalytic reaction mechanism, we should understand each