Fabrication of polyhedral Cu–Zn oxide nanoparticles by dealloying and anodic oxidation of German silver alloy for photoelectrochemical water splitting

A significant effort has been dedicated to the synthesis of Cu–Zn oxide nanoparticles as a robust photocathode material for photoelectrochemical water splitting. Cu–Zn oxide nanoparticles were formed by controlled anodization of German silver (Cu–Zn–Ni) alloy in an aqueous electrolyte. Scanning elec...

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Published in:Scientific reports 2022-10, Vol.12 (1), p.1-8, Article 16785
Main Authors: Bahnasawy, Nour, Elbanna, Abdussalam M., Ramadan, Mohamed, Allam, Nageh K.
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639/4077/4072/4062
639/4077/909/4086/4087
Alloys
Annealing
Copper
Electrodes
Electrolytes
Fabrication
Humanities and Social Sciences
Metal oxides
Morphology
multidisciplinary
Nanoparticles
Oxidation
Photoelectron spectroscopy
Scanning electron microscopy
Science
Science (multidisciplinary)
Silver
Spectrum analysis
X-ray diffraction
Zinc oxide
Zinc oxides
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description A significant effort has been dedicated to the synthesis of Cu–Zn oxide nanoparticles as a robust photocathode material for photoelectrochemical water splitting. Cu–Zn oxide nanoparticles were formed by controlled anodization of German silver (Cu–Zn–Ni) alloy in an aqueous electrolyte. Scanning electron microscopy (SEM) demonstrates the dependence of the obtained nanostructures on the anodization time. The X-ray diffraction (XRD) patterns showed the formation of copper oxide (CuO) and zinc oxide (ZnO) nanoparticles with good stability. This was also confirmed by the compositional X-ray photoelectron spectroscopy (XPS) analysis. The obtained polyhedral nanoparticles showed high optical activity with adequate bandgap energy. These optimized nanoparticles achieved boosted photocurrent of − 0.55 mA/cm 2 at − 0.6 V vs. SCE under AM 1.5 illumination, confirming the role of the optimized dealloying and thermal treatment in tuning the photoelectrochemical performance of the material.
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subjects 639/4077/4072/4062
639/4077/909/4086/4087
Alloys
Annealing
Copper
Electrodes
Electrolytes
Fabrication
Humanities and Social Sciences
Metal oxides
Morphology
multidisciplinary
Nanoparticles
Oxidation
Photoelectron spectroscopy
Scanning electron microscopy
Science
Science (multidisciplinary)
Silver
Spectrum analysis
X-ray diffraction
Zinc oxide
Zinc oxides
title Fabrication of polyhedral Cu–Zn oxide nanoparticles by dealloying and anodic oxidation of German silver alloy for photoelectrochemical water splitting
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