Boosting the catalytic performance of AlO-supported Pd catalysts by introducing CeO promoters.

Dalton Trans

State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China.

Published: February 2024

Maintaining the stability of noble metals is the key to the long-term stability of supported catalysts. In response to the instability of noble metal species at high temperatures, we developed a synergistic strategy of dual oxide supports. By designing and constructing ceria components with small sizes, we have achieved unity in the ability of catalytic materials to supply oxygen and stabilize metal species. In this study, we prepared AlO-CeO-Pd (AlCePd) catalysts containing trace amounts of Ce through the hydrolysis of cerium acetate, which achieved 100% CO conversion at 160 °C. More importantly, the activity remained at its initial 100% in the long-term durability testing, demonstrating the high stability of AlCePd. In contrast, the CO conversion of the CeO-Pd (CePd) catalyst decreased from 100% to 54% within 3 h. Through comprehensive studies, we found that this excellent catalytic performance stems from the stabilizing effect of an alumina support and the possible reverse oxygen spillover effect of small-sized ceria components, where small-sized ceria components provide active oxygen for independent Pd species, making it possible for the CO adsorbed on Pd to react with this oxygen species.

Download full-text PDF

Source
http://dx.doi.org/10.1039/d3dt03676fDOI Listing

Publication Analysis

Top Keywords

ceria components
12
catalytic performance
8
metal species
8
small-sized ceria
8
boosting catalytic
4
performance alo-supported
4
alo-supported catalysts
4
catalysts introducing
4
introducing ceo
4
ceo promoters
4

Similar Publications

Calcium phosphates are often used for biomedical applications. Hydroxyapatite, for example, has a wide range of applications because it mimics the mineral component of natural bone. Widespread interest in the catalytic properties of ceria is due to its use in automotive catalytic converters.

View Article and Find Full Text PDF

The development and characterization of synthesis techniques for oxide materials based on ceria is a subject of extensive study with the objective of their wide-ranging applications in pursuit of sustainable development. The present study demonstrates the feasibility of controlled synthesis of CeMO (M = Fe, Ni, Co, Mn, Cu, Ag, Sm, Cs, x = 0.0-0.

View Article and Find Full Text PDF

Facile Interfacial Reduction Suppresses Redox Chemical Expansion and Promotes the Polaronic to Ionic Transition in Mixed Conducting (Pr,Ce)O Nanoparticles.

ACS Appl Mater Interfaces

January 2025

Department of Materials Science & Engineering, The Grainger College of Engineering, University of Illinois Urbana-Champaign, 1304 W. Green Street, Urbana, Illinois 61801, United States.

Mixed ionic/electronic conductors (MIECs) are essential components of solid-state electrochemical devices, such as solid oxide fuel/electrolysis cells. For efficient performance, MIECs are typically nanostructured, to enhance the reaction kinetics. However, the effect of nanostructuring on MIEC chemo-mechanical coupling and transport properties, which also impact cell durability and efficiency, has not yet been well understood.

View Article and Find Full Text PDF
Article Synopsis
  • Cerium is a widely used rare earth element, especially in its oxide form, cerium dioxide (CeO2), which plays a crucial role in catalysis for various reactions.
  • * Infrared (IR) spectroscopy is a key technique in studying the behavior of catalysts, helping to monitor reaction intermediates and revealing important details about their chemical structures.
  • * Through advanced infrared spectroscopy on model ceria crystals, researchers found that theoretical calculations align with experimental data to clarify previous controversies concerning the vibrational frequencies of carbon monoxide and methanol adsorbed on ceria surfaces.
View Article and Find Full Text PDF

Posterior uveitis is a leading cause of vision impairment and blindness globally due to its detrimental effects on the choroid and retina. The condition is worsened by oxidative stress, which heightens inflammation and perpetuates a cycle of damage that current treatments only temporarily relieve. To address this, a novel treatment involving the in situ crystallization of ultrasmall cerium oxide nanoparticles (≈3 nm) on mesenchymal stem cell (MSC) extracellular vesicles (EVs) for the management of primed mycobacterial uveitis (PMU) is developed.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!