Laser-supported high-temperature MAS NMR for time-resolved in situ studies of reaction steps in heterogeneous catalysis

Temperature-switched MAS NMR: A new meth

Temperature-switched MAS NMR: A new method for time-resolved in situ studies of reaction steps in heterogeneous catalysis

✍ H. Ernst; D. Freude; T. Mildner 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 567 KB

The temperature of zeolite samples containing adsorbed methanol molecules was switched from room temperature to 500-600 K within 30-40 s by means of a laser beam. The catalytic reaction was monitored by 13C MAS NMR and 'H MAS NMR, the latter in steps of one second. A two-dimensional Fourier-transfor