A low field benchtop electron spin resonance (ESR) (also referred to as electron paramagnetic resonance (EPR)) spectrometer is used to reveal paramagnetic centres such as oxygen vacancies and Ti centres over 0.5%Pd/TiO. The measurement was performed at room temperature after the sample was reduced under mild hydrogen pressures and evacuated to P < 10 Torr. The measurement was possible due to a T compensation effect under vacuum: Correlation times at low pressures enabled sufficient line narrowing and detection of the ESR signal, justifying a method using benchtop spectrometers coupled to vacuum manifolds. The method justification was demonstrated using similar measurements performed on a reference compound, Mn(II) in plasticine: a measurement performed by saturation recovery technique revealed that T of the signal due to Mn(II) was smaller in vacuum than its atmosphere exposed counterpart. By applying vacuum, the ESR spectra of 0.5%Pd/TiO were collected at ambient temperatures, with features equivalent to the published data obtained at cryogenic temperatures.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10395677 | PMC |
| http://dx.doi.org/10.55730/1300-0527.3416 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Regulating d-p band center with selenium vacancy in iron diselenide nanoarrays towards sulfion-assisted seawater electrolysis for chlorine-free hydrogen production.
J Colloid Interface Sci
January 2025
School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074, China. Electronic address:
Defect engineering is considered one of the most powerful strategies for regulating the catalytic activity of electrocatalysts. A deep understanding of the defect-involved mechanism in electrocatalytic process is of great importance but remains a challenging task. In this study, an anionic Se-vacancy (V) was introduced into iron diselenide (FeSe) nanoarrays, enabling the catalyst to exhibit improved electrocatalytic performance for sulfion oxidation reaction (SOR).
View Article and Find Full Text PDFStrategically Engineered Metal Cluster-Rare Earth Oxide Heterojunction Catalyst for High-Performance Lean Electrolyte Lithium-Sulfur Batteries.
ACS Appl Mater Interfaces
January 2025
Key Laboratory of Carbon Materials of Zhejiang Province, Wenzhou University, Wenzhou 325035, China.
Developing high-energy-density lithium-sulfur batteries faces serious polysulfide shuttle effects and sluggish conversion kinetics, often necessitating the excessive use of electrolytes, which in turn adversely affects battery performance. Our study introduces a meticulously designed electrocatalyst, Cu-CeO@N/C, to enhance lean-electrolyte lithium-sulfur battery performance. This catalyst, featuring in situ synthesized Cu clusters, regulates oxygen vacancies in CeO and forms Cu-CeO heterojunctions, thereby diminishing sulfur conversion barriers and hastening reaction kinetics through the generation of S/S intermediates.
View Article and Find Full Text PDFGraphene Supported NiFe-LDH and PbO Catalysts Prepared by Plasma Process for Oxygen Evolution Reaction.
Materials (Basel)
December 2024
State Key Laboratory of Power Transmission Equipment Technology, School of Electrical Engineering, Chongqing University, Chongqing 400044, China.
The development of efficient catalysts for water electrolysis is crucial for advancing the low-carbon transition and addressing the energy crisis. This work involves the fabrication of graphene-based catalysts for the oxygen evolution reaction (OER) by integrating NiFe-LDH and PbO onto graphene using plasma treatment. The plasma process takes only 30 min.
View Article and Find Full Text PDFBinder-Less Molybdenum Doped CoO Based Integrated Electrodes Fabricated by Electric Discharge Corrosion for High-Efficiency Supercapacitors.
Materials (Basel)
December 2024
Department of Mechatronic Engineering, Guangdong Polytechnic Normal University, Guangzhou 510665, China.
Article Synopsis
- Cobalt oxide (CoO) is an attractive electrode material for supercapacitors due to its affordability, natural abundance, non-toxicity, and high capacitance.
- Researchers developed a binder-less molybdenum doped CoO (Mo@CoO) integrated electrode using a simple electric discharge corrosion (EDC) method, which allows for direct synthesis without templates or additives.
- The study found that the Mo@CoO based supercapacitor with a specific discharge pulse width achieved a significantly higher capacitance and quick charge/discharge capabilities, showcasing the EDC method's potential for fabricating efficient electrodes for energy storage and sensing applications.
Significantly Enhanced Acidic Oxygen Evolution Reaction Performance of RuO Nanoparticles by Introducing Oxygen Vacancy with Polytetrafluoroethylene.
Polymers (Basel)
December 2024
Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education/Shandong Province, State Key Laboratory of Biobased Material and Green Papermaking, Faculty of Light Industry, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
The supported RuO catalysts are known for their synergistic and interfacial effects, which significantly enhance both catalytic activity and stability. However, polymer-supported RuO catalysts have received limited attention due to challenges associated with poor conductivity. In this study, we successfully synthesized the RuO-polytetrafluoroethylene (PTFE) catalyst via a facile annealing process.
View Article and Find Full Text PDFWant 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!