Urea-HO defect engineering of δ-MnO for propane photothermal oxidation: Structure-activity relationship and synergetic mechanism determination.

Photothermal catalysis has an advantage in effective and economical elimination technology of volatile organic compounds (VOCs) in the ascendant. Herein, various surface defect engineering routes were adopted to enhance the low-temperature propane oxidation of δ-MnO. Compared to reducing etchants urea and vitamin C, δ-MnO treated with urea - HO exhibited an excellent thermal (T = 240 ℃) and photothermal (T = 196 ℃) activities of propane oxidation.

Polyhedral cobalt oxide supported Pt nanoparticles with enhanced performance for toluene catalytic oxidation.

Polyhedral CoO was synthesized by calcination of Co-based metal-organic framework ZIF-67 and highly dispersed Pt nanoparticles were successfully loaded on CoO. The catalytic results showed that Pt/CoO had the best activity and stability. As compared with conventional CoO, polyhedral CoO showed more excellent catalytic oxidation performance of toluene, which was related to enhanced oxygen mobility, defective structure and rich active oxygen species provided by Polyhedral CoO.