Electronic metal−support interaction of Pt1/V2O5 enables efficient and selective hydrogenation of aromatic nitros

Abstract

Arylamines play a key role in the synthesis of agricultural chemicals, dyes, medicine, rubber and other fine chemicals. The hydrogenation of aromatic nitro is the most convenient protocol for the preparation of arylamines. Therefore, it is of great research significance to develop a stable, efficient and low-cost catalyst in the hydrogenation of nitro compounds. Therefore, the supported single-atom platinum Pt₁/V₂O₅ (0.1 wt% of Pt by ICP−OES) was prepared for the efficient hydrogenation of variety of aromatic nitros. The Pt₁/V₂O₅ was characterized by SEM, TEM, HAADF−STEM, XRD, XPS, Raman and CO−DRIFT analysis. Amount of aromatic nitros with functional groups (such as CN and carbonyl groups) were hydrogenated smoothly to deliver the amines in 50–95 % yields. The catalytic performances are attributed to the electronic metal−support interactions between Pt₁ atoms and V₂O₅ with the abundant surface oxygen vacancy, resulting in the enhanced electronic density of Pt₁ atoms, which were confirmed by the results of XPS and Raman spectra. The high activity and reusability of Pt₁/V₂O₅ catalyst imply its potential application in fine chemical synthesis.