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Synthesis of binary nanohybrid-based polygonal Pd nanoparticles for proficient photoelectrochemical oxidation of methanol and urea

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Abstract

The use of high-performance electrocatalysts is critical for the electrooxidation of methanol and urea, but there are some potential challenges. A binary nanocomposite was created based on palladium nanoparticles (PdNPs), and the anchored gold solution (HAuCl4·3H2O) was deposited onto PdNPs via a one-step photodeposition technique. Otherwise, the as-prepared graphene was added to PdNPs using the hydrothermal route to exhibit the second nanocomposite Pd/graphene. Pd deformed into a polygonal shape in the presence of polyvinylpyrrolidone (PVP) as a capping agent. Throughout the photodeposition of Au on the surface of PdNPs, the surface plasmonic resonance (SPR) was observed near 523 nm, resulting in a significant decrease in the diameter size from 27m to 18.6 nm. The attenuation of photoluminescence intensity also demonstrated that Pd/graphene is more efficient for charge separation, which is favorably reflected in the efficiency of the single fuel cell. After adding Au and graphene to PdNPs, the surface roughness was improved. Besides, electrochemical data showed that Pd/graphene has superior mass-specific behavior equal to 76.96 mC/mg under visible light illumination rather than in the dark state (52 mC/mg) during methanol oxidation. Otherwise, the mass-specific activity of Pd/Au under such urea conditions has a value of 31.86 mC/mg. To avoid the harsh conditions and to depend on the obtained promising data, it can be concluded that such a preparation method is a reliable synthetic route for the production of a nanocomposite system for attaining maximum electrochemical oxidation of both methanol and urea.

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Acknowledgements

The authors express many thanks to the Institute of Nanoscience & Nanotechnology, Kafrelsheikh University, for its support for all analyses and help during the work. Also, many gratitude to the City of Scientific Research and Technological Applications (SRTA-City) for the electrochemical investigations and TEM measurements.

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  1. Institute of Nanoscience& Nanotechnology, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt

    Ahmed E. Abd-elnaby, Kamel R. Shoueir & Maged El-Kemary

  2. Institut de Chimie et Procédés Pour l’Energie, l’Environnement et la Santé (ICPEES), CNRS UMR 7515-Université de Strasbourg, 25 rue Becquerel, 67087, Strasbourg, France

    Kamel R. Shoueir

  3. Electronic Materials Research Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), P.O. Box 21934, New Borg El-Arab City, Alexandria, Egypt

    Wael Wazeer & Abd El-Hady B. Kashyout

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  1. Ahmed E. Abd-elnaby
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Abd-elnaby, A.E., Shoueir, K.R., Wazeer, W. et al. Synthesis of binary nanohybrid-based polygonal Pd nanoparticles for proficient photoelectrochemical oxidation of methanol and urea. J Mater Sci: Mater Electron 33, 13255–13270 (2022). https://doi.org/10.1007/s10854-022-08266-x

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