Surface Lattice-Embedded Pt Single-Atom Catalyst on Ceria-Zirconia with Superior Catalytic Performance for Propane Oxidation.

Tuning the metal-support interaction and coordination environment of single-atom catalysts can help achieve satisfactory catalytic performance for targeted reactions. Herein, via the facile control of calcination temperatures for Pt catalysts on pre-stabilized CeZrO (CZO) support, Pt single atoms (Pt) with different strengths of Pt-CeO interaction and coordination environment were successfully constructed. With the increase in calcination temperature from 350 to 750 °C, a stronger Pt-CeO interaction and higher Pt-O-Ce coordination number were achieved due to the reaction between PtO and surface Ce species as well as the migration of Pt into the surface lattice of CZO.

Salen-based porous aromatic frameworks with multi-active sites as anode materials for lithium-ion batteries.

Porous organic polymers are considered as excellent candidates for the electrode materials in rechargeable battery due to their desirable properties including porosity, customizable structure, and intrinsic chemical stability. Herein a Salen-based porous aromatic framework (Zn/Salen-PAF) is synthesized through a metal directed method and further used as efficient anode materialfor lithium-ion battery. Attributing to the stable functional skeleton, Zn/Salen-PAF delivers a reversible capacity of 631 mAh·g at 50 mA·g, a high-rate capability of 157 mAh·g at 20.

Fine-tuned local coordination environment of Pt single atoms on ceria controls catalytic reactivity.

Constructing single atom catalysts with fine-tuned coordination environments can be a promising strategy to achieve satisfactory catalytic performance. Herein, via a simple calcination temperature-control strategy, CeO supported Pt single atom catalysts with precisely controlled coordination environments are successfully fabricated. The joint experimental and theoretical analysis reveals that the Pt single atoms on Pt/CeO prepared at 550 °C (Pt/CeO-550) are mainly located at the edge sites of CeO with a Pt-O coordination number of ca.

Pt Atomic Single-Layer Catalyst Embedded in Defect-Enriched Ceria for Efficient CO Oxidation.

The local coordination structure of metal sites essentially determines the performance of supported metal catalysts. Using a surface defect enrichment strategy, we successfully fabricated Pt atomic single-layer (Pt) structures with 100% metal dispersion and precisely controlled local coordination environment (embedded adsorbed) derived from Pt single-atoms (Pt) on ceria-alumina supports. The local coordination environment of Pt not only governs its catalytic activity but also determines the Pt structure evolution upon reduction activation.

Platinum-ruthenium bimetallic clusters on graphite: a comparison of vapor deposition and electroless deposition methods.

Bimetallic Pt-Ru clusters have been grown on highly ordered pyrolytic graphite (HOPG) surfaces by vapor deposition and by electroless deposition. These studies help to bridge the material gap between well-characterized vapor deposited clusters and electrolessly deposited clusters, which are better suited for industrial catalyst preparation. In the vapor deposition experiments, bimetallic clusters were formed by the sequential deposition of Pt on Ru or Ru on Pt.