Related Experiment Video
Updated: Jan 7, 2026
Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
Controlling NOx Reduction Pathways of Rh Catalysts with Oxygen-Vacancy-Rich ZnO1-x Nanoparticles Derived from a
Liyang Wang1, Zhe Tan2,3, Jie Zheng1
1Institute of Chemical Engineering and Technology, Xi'an Jiaotong University, Innovation Harbour, Xi-xian New District, Xi'an 712000, China.
Abstract:
Surface and lattice vacancies in crystal structures play a critical role in improving properties, but synthesizing vacancy-rich crystals remains a significant challenge. In this research, we proposed a novel method to synthesize ZnO1-x nanoparticles (NPs) with rich oxygen vacancies (VO), by thermally decomposing a H2DAB-Zn2(ox)3 metal-organic framework. The high-concentration VO in ZnO1-x NPs were confirmed by X-ray powder diffraction, X-ray photoelectron spectroscopy, electron paramagnetic resonance, and other measurements. The lattice expansion was observed for ZnO1-x NPs, resulting from electrostatic repulsion between Zn2+ and positive VO. As the support for NOx reduction, the homogeneously dispersed PGM/ZnO1-x (PGM = Ru, Rh, Pd, Ir, and Pt) catalysts were prepared and exhibited remarkable improvement in activities compared with the corresponding PGM/ZnO. The activity enhancement of Rh/ZnO1-x may be attributed to strong CO adsorption and fast NO dissociation induced by the abundant VO, resulting in a short reaction pathway distinct from Rh/ZnO.
Related Concept Videos
01:29Preparation of Amines: Reduction of Oximes and Nitro Compounds
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
02:50Catalysis