Active and durable electrocatalysts are essential for commercializing direct methanol fuel cells. However, Pt-based catalysts, extensively utilized in the methanol oxidation reaction (MOR), are suffered from resource scarcity and CO poisoning, which degrade MOR activity severely. Herein, PtRu bimetallic catalysts were synthesized by confining PtRu alloys within the shells of mesoporous carbon hollow spheres (MCHS) via a vacuum-assisted impregnation method (PtRu@MCHS). The confinement effect induced by mesoporous carbon hollow spheres resulted in a robust structure of PtRu@MCHS with an ultrafine dispersion of alloy nanoparticles. The experimental and theoretical results confirmed that the boosting electrocatalytic activity and stability of the MOR over PtRu@MCHS were contributed to the regulated electronic structure as well as the superior CO tolerance of atomic Pt site caused by the electronic interaction between single Pt atoms and Ru nanoparticles. This strategy is versatile for the rational design of Pt-based bimetallic catalysts and has a positive impact on MOR performance.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.jcis.2024.09.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Antibiofilm and Anticancer Activity of Multi-Walled Carbon Nanotubes Fabricated with Hot-Melt Extruded Astaxanthin-Mediated Synthesized Silver Nanoparticles.
Int J Nanomedicine
January 2025
Department of Bio-Health Convergence, Kangwon National University, Chuncheon, 24341, Republic of Korea.
Purpose: Multi-walled carbon nanotubes (MWCNTs) were used as carriers for silver nanoparticles (AgNPs). In this process, MWCNTs were coated with mesoporous silica (MWCNT-Silica) for uniform and regular loading of AgNPs on the MWCNTs. In addition, astaxanthin (AST) extract was used as a reducing agent for silver ions to enhance the antioxidant, antibiofilm, and anticancer activities of AgNPs.
View Article and Find Full Text PDFOptimizing the Coordination Energy of Co-N Sites by Co Nanoparticles Integrated with Fe-NCNTs for Boosting PEMFC and Zn-Air Battery Performance.
Small
January 2025
School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin, 300072, China.
Enhancing the catalytic performance and durability of M-N─C catalyst is crucial for the efficient operation of proton exchange membrane fuel cells (PEMFCs) and Zn-Air batteries (ZABs). Herein, an approach is developed for the in situ fabrication of a MOFs-derived porous carbon material, co-loaded with Co nanoparticles (NPs) and Co-N sites and integrated onto Fe-doped carbon nanotubes (CNTs), named Co-NC/Fe-NCNTs. Incorporating polymer-wrapped CNTs improves MOFs dispersion annealing at high temperature, which amplifies the three-phase boundary (TPB) by generating much more mesopores and exposing additional active sites within the catalysts layer.
View Article and Find Full Text PDFDevelopment, analysis, and effectiveness of an F-C-MgO/rGOP catalyst for the degradation of atrazine using ozonation process: Synergistic effect, mechanism, and toxicity assessment.
J Environ Manage
January 2025
Department of Chemistry, College of Science and Humanites at Al-Quway'iyahl, Shaqra University, Saudi Arabia. Electronic address:
This study considered the effects of fluoride, MgO, sucrose, and rGO on the characteristics of the fluoride-carbon-MgO/rGO predicted (F-C-MgO/rGOP) catalyst and its effectiveness in the catalytic ozonation process (COP) for atrazine elimination from aqueous solutions. Using a mixture design, the catalyst composition was optimized to 13.6% sucrose, 50% Mg (OH)2, 25% NaF, and 11.
View Article and Find Full Text PDFLignin-Derived Activated Carbon as Electrode Material for High-Performance Supercapacitor.
Molecules
December 2024
Institute of Urban & Rural Mining, Changzhou University, Changzhou 213164, China.
Utilizing lignin-derived activated carbon in supercapacitors has emerged as a promising approach to alleviating environmental pollution and promoting the high-value utilization of byproducts in the papermaking industry. In this study, activated carbons (LACs) were prepared using a simple one-step KOH activation approach and by employing enzymatic hydrolysis lignin (EHL). The impact of the KOH activation parameters on the microstructure and capacitive performance of the LACs was investigated by varying the KOH/EHL ratio and activation temperature.
View Article and Find Full Text PDFChemical activation of cotton fibers with varied regents induces distinct morphology of activated carbon and adsorption capacity of methylene blue.
Int J Biol Macromol
January 2025
School of Material Science and Engineering, University of Jinan, Jinan 250022, PR China. Electronic address:
Some biomasses like cotton contain natural fibrous structures. This is a desirable structural feature for exposure of adsorption sites on cotton-derived activated carbon (AC). This was verified herein by conducting activation of cotton with ZnCl, HPO, KCO or KOH, probing whether structural transformation during activation could be confined inside a cotton fiber.
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!