کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5357645 | 1388221 | 2010 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of flower-like Cu2O nanoparticles by pulse electrodeposition and their electrocatalytic application
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A pulsed electrodeposition technique based on a multipulse sequence of potentials of equal amplitude, duration and polarity was employed for preparation of highly dispersed flower-like cuprous oxide (Cu2O) nanoparticles. The morphology analysis of the particles using scanning electron microscope (SEM) reveals that the flower-like particles were from sequential growth of Cu2O along the (1Â 1Â 1) direction on the cubic Cu2O (1Â 0Â 0). The structure and the chemical composition of the deposits were characterized by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Optical property and band gap of the Cu2O was investigated using UV/vis diffuse reflection spectra (DRS), and the measured value of energy gap is 2.18Â eV. The dark and light open circuit potential-time characterization study showed that the flower-like Cu2O nanoparticles exhibited good photoelectric response. Cyclic voltammetry carried out in the presence of p-nitrophenol (p-NP) shows that the electrocatalytic performance of the Cu2O particles for the reduction of p-NP, which was characterized by a cathodic peak at around â0.6Â V. The influence of the incidence of light on the electrocatalysis is also discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 256, Issue 20, 1 August 2010, Pages 5862-5866
Journal: Applied Surface Science - Volume 256, Issue 20, 1 August 2010, Pages 5862-5866
نویسندگان
Yong-e Gu, Xu Su, Yongling Du, Chunming Wang,