Polyol synthesized graphene/PtxNi100-x nanoparticles alloy for improved electrocatalytic oxidation of methanol in acidic and basic media

In this study, a series of graphene-supported Pt–Ni nanoparticles are successfully synthesized by a simple modified polyol method and used as electrocatalysts for methanol oxidation. In this method, graphene oxide is reduced to graphene and Pt–Ni alloy nanoparticles are deposited on graphene sheets simultaneously in ethylene glycol, which acts as a reducing agent. The electrocatalysts are physically characterized using X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), thermal gravimetric analysis (TGA), high-resolution transmission electron microscopy (HRTEM), and scanning electron microscopy (SEM). The cyclic voltammetry and chronoamperometry electrochemical measurements in acidic and alkaline media are promising. The electrocatalysts containing Ni (G/Pt75–Ni25, G/Pt54–Ni46 and G/Pt40–Ni60) have higher catalytic activity and stability for the MOR than pure G/Pt in both acidic and alkaline media. G/Pt54–Ni46 has the highest performance in acidic and alkaline media, and its activity in alkaline media (2732 A/gPt) is nearly 10 times higher than that in acidic media (260 A/gPt). The superior catalytic performance in alkaline media may be because Ni is more stable in alkaline media. These electrocatalysts are promising candidates for direct methanol fuel cell (DMFC) anode catalysts.
Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research

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In this study, sitagliptin nanoparticles (sizes ranging from 210 to 618 nm) were developed. The bioadhesion properties of the nanoparticles, as well as the swelling of the nanoparticles on the mucus membrane aided in sustained drug release. The pattern of drug release was in accordance with the Peppas model. Fourier-transform infrared (FTIR) spectroscopy demonstrated that there were no significant interactions between sitagliptin and chitosan. Differential scanning calorimetry (DSC) results showed an absence of drug peaks due to the fact that the drug was present in an amorphous state. Mucoadhesive nanoparticles wer...
Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
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Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
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Source: Biomed Res - Category: Research Authors: Tags: Biomed Res Int Source Type: research
With each single X-ray pulse having its own characteristics, understanding the individual property of each X-ray free-electron laser (XFEL) pulse is essential for its applications in probing and manipulating specimens as well as in diagnosing the lasing performance. Intensive research using XFEL radiation over the last several years has introduced techniques to characterize the femtosecond XFEL pulses, but a simple characterization scheme, while not requiring ad hoc assumptions, to address multiple aspects of XFEL radiation via a single data collection process is scant. Here, it is shown that single-particle diffraction pa...
Source: Journal of Synchrotron Radiation - Category: Physics Authors: Tags: X-ray free-electron lasers single-particle diffraction pulse energy coherence beam profile research papers Source Type: research
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Source: Journal of Electroanalytical Chemistry - Category: Chemistry Source Type: research
Analyst, 2020, Advance Article DOI: 10.1039/C9AN01636H, PaperYuxin Li, Ashley E. Ross New carbon surfaces for significantly improved detection of purine analytes with fast-scan cyclic voltammetry. To cite this article before page numbers are assigned, use the DOI form of citation above. The content of this RSS Feed (c) The Royal Society of Chemistry
Source: RSC - Analyst latest articles - Category: Chemistry Authors: Source Type: research
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Source: Annali Italiani di Chirurgia - Category: Surgery Tags: Ann Ital Chir Source Type: research
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Source: Lab Soft News - Category: Laboratory Medicine Authors: Tags: AI Clinical Lab Testing Diagnostics Food and Drug Administration Healthcare Information Technology Healthcare Innovations Medical Research Point-of-Care Testing Source Type: blogs
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Source: NeuroImage: Clinical - Category: Radiology Source Type: research
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Source: NeuroImage: Clinical - Category: Radiology Source Type: research
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