التفاصيل البيبلوغرافية
| العنوان: |
In situ study of copper reduction in SrTi1-xCuxO3 nanoparticles. |
| المؤلفون: |
Coletta VC; São Carlos Institute of Physics, University of São Paulo, PO Box 369, 13560-970, São Carlos, SP, Brazil. valmor@ifsc.usp.br., Marcos FC, Nogueira FG, Bernardi MI, Michalowicz A, Gonçalves RV, Assaf EM, Mastelaro VR |
| المصدر: |
Physical chemistry chemical physics : PCCP [Phys Chem Chem Phys] 2016 Jan 21; Vol. 18 (3), pp. 2070-9. Date of Electronic Publication: 2015 Dec 21. |
| نوع المنشور: |
Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: Royal Society of Chemistry Country of Publication: England NLM ID: 100888160 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1463-9084 (Electronic) Linking ISSN: 14639076 NLM ISO Abbreviation: Phys Chem Chem Phys Subsets: PubMed not MEDLINE |
| أسماء مطبوعة: |
Original Publication: Cambridge [England] : Royal Society of Chemistry, c1999- |
| مستخلص: |
Perovskite strontium titanate is a promising functional material for gas sensors and catalysis applications. Herein, we report the preparation of SrTi1-xCuxO3 nanoparticles with Cu doped in the B sites using a modified polymeric precursor method. This study describes in detail the structural and local atomic configurations for the substitution of Cu into the titanium sites and its reducibility using X-ray diffraction (XRD), field emission gun scanning and transmission electron microscopies (FEG-SEM and TEM), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction (TPR) analyses. Our results indicate that copper is segregated for x≥ 0.06. After exposing the samples to a hydrogen-rich atmosphere at temperatures over 500 K, copper is reduced from Cu(2+) to metallic Cu. This reduction was attributed to copper atoms that originated primarily from the CuO phase. |
| تواريخ الأحداث: |
Date Created: 20151222 Date Completed: 20160704 Latest Revision: 20160109 |
| رمز التحديث: |
20231215 |
| DOI: |
10.1039/c5cp05939a |
| PMID: |
26687828 |
| قاعدة البيانات: |
MEDLINE |
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