Silver-modified zeolites have demonstrated promising properties for hydrocarbon feedstock valorization and the oxidation of organic compounds. Within the frame of the scientific interest for selective oxidation of light alkenes on metal-modified zeolites, the transformation of propene on Ag/H-ZSM-5 zeolite in the presence of molecular oxygen has been monitored by ¹³C (CP) MAS NMR spectroscopy at 296–773 K. Silver-allyl intermediate species have been detected by ¹³C CP/MAS NMR, indicating that Ag⁺ sites are involved in propene transformation. It is assumed that oxygen and propene compete for the Ag⁺ adsorption sites, thus prompting propene adsorption on zeolite Brønsted acid sites (BAS) and its further transformation by oligomerization and conjunct polymerization. Among the products of propene oxidation by molecular oxygen, only carbon dioxide has been detected by ¹³C MAS NMR, implying high activity of Ag/H-ZSM-5 in alkene total oxidation. It is thus inferred that silver-modified zeolite is not a promising catalyst for propene selective oxidation to propene oxide and carbonyl group containing organics.

银改性沸石在碳氢化合物原料增值和有机化合物氧化方面表现出了良好的性能。在金属改性沸石上轻质烯烃选择性氧化的科学兴趣框架内，分子氧存在下丙烯在 Ag/H-ZSM-5 沸石上的转化已通过¹³ C (CP) MAS NMR 光谱监测温度为 296–773 K。通过¹³ C CP/MAS NMR检测到银烯丙基中间体，表明 Ag ⁺位点参与了丙烯转化。假设氧气和丙烯竞争Ag ⁺吸附位点，从而促使丙烯吸附在沸石布朗斯台德酸位点（BAS）上，并通过低聚和联合聚合进一步转化。在分子氧氧化丙烯的产物中， ¹³ C MAS NMR仅检测到二氧化碳，这表明Ag/H-ZSM-5在烯烃全氧化中具有高活性。因此推断银改性沸石对于丙烯选择性氧化生成环氧丙烷和含羰基有机物来说不是一种有前途的催化剂。