CO tolerance at pure Pt, Pt-Co, and Pt-Ru alloys was investigated by X-ray photoelectron spectroscopy combined with an electrochemical cell (EC-XPS) in order to discover a hint for designing higher performance anode catalysts. After the electrochemical stabilization and/or CO adsorption, these electrodes were immediately transferred to the XPS chamber without exposure to air to avoid contamination of the surfaces. It was revealed that alloying with Co or Ru modified the electronic structures of Pt atoms, resulting in a positive core level (CL) shift of Pt 4f(7/2) which could weaken the Pt-CO interaction. For the Pt-Co alloy electrode, the Pt 4f(7/2) CL shift remained after the electrochemical stabilization despite Co dissolution and formation of a Pt skin layer. Changes in surface core level shifts (DeltaSCLSs) induced by CO adsorption were evaluated and related to the CO adsorption energy. The values of DeltaSCLS at these alloys were smaller than that of pure Pt, indicating that Ru and Co are effective elements to weaken the bond strength of Pt-CO.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/jp0653510 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
LRNet: Link Residual Neural Network for Blood Vessel Segmentation in OCTA Images.
J Imaging Inform Med
January 2025
Department of Ophthalmology, The Affiliated Hospital of Guilin Medical University, Guilin, China.
Optical coherence tomography angiography (OCTA) is an emerging, non-invasive technique increasingly utilized for retinal vasculature imaging. Analysis of OCTA images can effectively diagnose retinal diseases, unfortunately, complex vascular structures within OCTA images possess significant challenges for automated segmentation. A novel, fully convolutional dense connected residual network is proposed to effectively segment the vascular regions within OCTA images.
View Article and Find Full Text PDFElectronic structure modulation of ultrathin PtRuMoCoNi high-entropy alloy nanowires for boosting peroxidase-like activity and sensitive colorimetric determination of isoniazid and hydrazine.
Mikrochim Acta
January 2025
Department of General Surgery, Hui Ya Hospital of The First Affiliated Hospital, Sun Yat-Sen University, Huizhou, 516081, Guangdong, China.
Self-supported ultrathin PtRuMoCoNi high-entropy alloy nanowires (HEANWs) were synthesized by a one-pot co-reduction method, whose peroxidase (POD)-like activity and catalytic mechanism were elaborated in detail. As expected, the PtRuMoCoNi HEANWs showed excellent POD-like activity. It can quickly catalyze the oxidization of colorless 3,3',5,5'-tetramethylbenzidine (TMB) to blue TMB through decomposition of HO to superoxide radicals.
View Article and Find Full Text PDFWhite light-emitting electrochemical cells based on metal-free TADF emitters.
Nat Commun
January 2025
The Organic Photonics and Electronics Group, Department of Physics, Umeå University, Umeå, Sweden.
The attainment of white emission from a light-emitting electrochemical cell (LEC) is important, since it enables illumination and facile color conversion from devices that can be cost-efficient and sustainable. However, a drawback with current white LECs is that they either employ non-sustainable metals as an emitter constituent or are intrinsically efficiency limited by that the emitter only converts singlet excitons to photons. Organic compounds that emit by thermally activated delayed fluorescence (TADF) can address these issues since they can harvest all excitons for light emission while being metal free.
View Article and Find Full Text PDFPatient reported tools for assessing potential medicine-related symptoms: A systematic review.
Res Social Adm Pharm
January 2025
Quality Use of Medicines and Pharmacy Research Centre, UniSA Clinical and Health Sciences, University of South Australia, Adelaide, 5001, Australia.
Background: Medicine-related symptom assessment tools have been developed to assist healthcare professionals in detecting potential medicine-related symptoms. This systematic review aimed to identify and evaluate the measurement properties of medicine-related symptom assessment tools.
Method: A systematic search was conducted in Ovid Medline, Ovid Embase, Ovid PsychInfo, and SCOPUS databases up to March 16, 2024.
Structured-Visual Model for Dental Examination in Autism Spectrum Disorder Children: Cooperation and Compliance.
Int Dent J
January 2025
Faculty of Dentistry, Universitas Muhammadiyah Yogyakarta, Yogyakarta, Indonesia.
Introduction: Children diagnosed with autism spectrum disorder (ASD) may experience challenges in social interaction, communication, and sensory processing, which might influence their cooperative behavior during dental visits. To address this issue, visual pedagogy is commonly employed as a behavioral technique to facilitate successful dental examinations and treatments.
Objectives: The objective of this study was to evaluate the efficacy of a structured-visual behavioral approach in promoting compliance and cooperation during dental examinations in children with ASD in the Yogyakarta Special Region Province, Indonesia.
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!