https://www.sciencedirect.com/science/article/pii/S0926860X21001320

夏航琦，戴启广，王幸宜

恭喜夏博士第二篇ACA发表（可以顺利毕业了）

由于各种原因导致夏博士的论文几乎全是自己亲手打造，实属不容易

Highlights

Catalyst 30FT-S is highly active and stable for oxidative decomposition of chlorobenzene.

Ti3+-oxygen vacancy is contributed from the electron transfer from Fe3+ to Ti4+ in Fe-O-Ti structure and the incorporation of S4+ into the surface lattice.

The reaction activity for chlorobenzene is positively related to the amount of chemisorbed oxygen/oxygen vacancy.

Chlorobenzene adsorbs on a pair of adjacent Lewis acid sites through the π cloud and the Cl atom over the iron titanate catalysts, with a low apparent activation energy.

Abstract

Iron titanate catalysts with various Fe/(Fe + Ti) ratios were prepared by sol-gel method and investigated in catalytic oxidation of chlorobenzene (CB). The catalysts exhibited good activity and sulfation further promoted the performance in both activity and stability. Ti3+-oxygen vacancy (Vo) was determined with Raman, EPR and O2-TPD, while the generation mechanism of Ti3+-Vo was investigated by XPS and UV-vis. The structure-activity relationship was established between oxygen vacancies (Vo) and CB oxidation. The generation of Ti3+-Vo was attributed from the electron transfer from Fe3+ to Ti4+ in Fe-O-Ti structure as well as the incorporation of S4+ into surface lattice (for the sulfated catalyst). Moreover. the adsorption geometries of CB were comparatively studied. CB adsorbed on a pair of adjacent Lewis acid sites over the iron titanate catalysts through the Cl atom and the π cloud. CB of this adsorption type was highly activated and essentially contributed to the high activities.

http://blog.sciencenet.cn/home.php?mod=space&uid=3913&do=blog&id=1277209