LAUSR

A nanocatalyst constructed from reduced graphene oxide and iridium atoms (RGOIrNc ) showed high selectivity (99-100%) and reliability for the transformation of aromatic alcohols into carbonyl compounds via ultrasonication without using harmful chemicals and solvent. Experimental data including Fourier-transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), spherical-aberration corrected field emission TEM (ULTRA-HRTEM), and Raman spectra confirm the nanostructure of the title composite. Noticeably, the structural characteristics of this catalyst preserved unchanged within 25 catalytic cycles and the activity and selectivity for the transformation of benzylic alcohols remained well. The average turn over frequency is higher than 2500 h-1, while the total turnover number (TON) is more than one hundred and fifty thousand after 25 catalytic cycles, and the productivity of carbonyl compound reaches 255418 , indicating that RGOIrNc catalyst have good durability, stability, and high greenness.