Ningqiang Zhang 교수

We report an Ag₁ single-atom catalyst (Ag₁ /MnO₂ ), which was synthesized from thermal transformation of Ag nanoparticles (NPs) and surface reconstruction of MnO₂ . The evolution process of Ag NPs to single atoms is firstly revealed by various techniques, including in situ ETEM, in situ XRD and DFT calculations. The temperature-induced surface reconstruction process from the MnO₂ (211) to (310) lattice plane is critical to firmly confine the

Dual-atom site catalysts (DACs) have emerged as a new frontier in heterogeneous catalysis because the synergistic effect between adjacent metal atoms can promote their catalytic activity while maintaining the advantages of single-atom site catalysts (SACs), like 100 % atomic utilization efficiency and excellent selectivity. Herein, a supported Pd₂ DAC was synthesized and used for electrochemical CO₂ reduction reaction (CO₂ RR) for the first time. The as-obtained

In recent decades, the environmental protection and long-term sustainability have become the focus of attention due to the increasing pollution generated by the intense industrialization. To overcome these issues, environmental catalysis has increasingly been used to solve the negative impact of pollutants emission on the global environment and human health. Supported platinum-metal-group (PGM) materials are commonly utilized as the state-of-the-art catalysts to eliminate gaseous pollutants but

In this article, moisture-treated Pd@CeO₂/Al₂O₃ and Pd/CeO₂/Al₂O₃ catalysts were synthesized and applied in automotive three-way catalytic (TWC) reactions. Compared to the Pd/CeO₂/Al₂O₃ catalyst, the Pd@CeO₂/Al₂O₃ core-shell catalyst had better TWC activities. Transmission electron microscopy (TEM) images and X-ray photoelectron spectra (XPS) showed excess PdO<sub>2

Abstract Dual‐atom site catalysts (DACs) have emerged as a new frontier in heterogeneous catalysis because the synergistic effect between adjacent metal atoms can promote their catalytic activity while maintaining the advantages of single‐atom site catalysts (SACs), like 100 % atomic utilization efficiency and excellent selectivity. Herein, a supported Pd 2 DAC was synthesized and used for electrochemical CO 2 reduction reaction (CO 2 RR) for the first time. The as‐obtained Pd 2 DAC exhibited su

Kinetic analyses of Ce4+ ↔ Ce3+ redox and CO2/H2 formation for the unsteady-state water–gas shift (WGS) reaction under periodic CO ↔ H2O feeds to Cu/CeO2 catalysts are carried out by in situ/operando ultraviolet–vis and infrared studies at 350 °C. Under CO, the Ce4+–OH species are reduced to produce H2, CO2, and Ce3+–□ (oxygen vacancy). Under the subsequent feed of H2O, Ce3+–□ is reoxidized by H2O to yield H2 and Ce4+–OH species. The rates of Ce4+ reduction/Ce3+ reoxidation are close to those of

Interfacial lattice oxygen in Pt/MnO_x could act as the active oxygen species for low-temperature CO oxidation.

This study reports a comprehensive investigation into the active sites and reaction mechanism for the selective catalytic reduction of NO by NH₃ (NH₃-SCR) over phosphate-loaded ceria (P/CeO₂). Catalyst characterization and density functional theory calculations reveal that H₃PO₄ and H₂P₂O₆ species are the dominant phosphate species on the P/CeO₂ catalysts under the experimental conditions. The redu