Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application
Well-dispersed ZnO(x)CeO2(1−x) nanodots@carbon nanofibers as anode catalysts for the electrooxidation of methanol were synthesized by an easy-controlled template-free method. Their structure and morphology were characterized by X-ray diffraction (XRD), high resolution transmission electron microscop...
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| Format: | Article |
| Language: | English |
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Elsevier
2016-03-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535215001872 |
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| author | Zafar Khan Ghouri Nasser A.M. Barakat Hak Yong Kim Mira Park Khalil Abdelrazek Khalil Mohamed H. El-Newehy Salem S. Al-Deyab |
| author_facet | Zafar Khan Ghouri Nasser A.M. Barakat Hak Yong Kim Mira Park Khalil Abdelrazek Khalil Mohamed H. El-Newehy Salem S. Al-Deyab |
| author_sort | Zafar Khan Ghouri |
| collection | DOAJ |
| description | Well-dispersed ZnO(x)CeO2(1−x) nanodots@carbon nanofibers as anode catalysts for the electrooxidation of methanol were synthesized by an easy-controlled template-free method. Their structure and morphology were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), field-emission scanning electron microscopy (FESEM) equipped with rapid EDX (energy dispersive analysis of X-ray). The appealed characterization techniques specified that the obtained material is carbon nanofibers decorated by ZnO and CeO2 nanodots. The electrochemical oxidation of methanol on ZnO(x)CeO2(1−x) nanodots@CNFs modified glassy carbon electrode in alkaline solutions was systematically evaluated by cyclic voltammetry (CV) method. A detailed investigation is made for the electrocatalytic oxidation of methanol by varying methanol concentration. The corresponding current densities of ZnO(60%)CeO2(40%) nanodots@CNFs and ZnO(40%)CeO2(60%) nanodots@CNFs were 5.3 and 16.3 mA/cm2, respectively. Moreover, negative onset potential (−50 mV vs. Ag/AgCl) was observed when ZnO(40%)CeO2(60%) nanodots@CNFs were utilized, which is a superior value among the reported non-precious electrocatalysts. These results suggested cheap and effective nanomaterials as non-precious catalyst for DMFCs application and pave the way to further improve the performance in energy and environmental applications. |
| first_indexed | 2024-12-10T16:47:32Z |
| format | Article |
| id | doaj.art-b8a2858f9f844e98aecf6239e169dbf5 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-10T16:47:32Z |
| publishDate | 2016-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-b8a2858f9f844e98aecf6239e169dbf52022-12-22T01:41:01ZengElsevierArabian Journal of Chemistry1878-53522016-03-019221922810.1016/j.arabjc.2015.05.024Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell applicationZafar Khan Ghouri0Nasser A.M. Barakat1Hak Yong Kim2Mira Park3Khalil Abdelrazek Khalil4Mohamed H. El-Newehy5Salem S. Al-Deyab6Department of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756, Republic of KoreaDepartment of Organic Material & Fiber Engineering, Chonbuk National University, Jeonju 561-756, Republic of KoreaDepartment of BIN Fusion Technology, Chonbuk National University, Jeonju 561-756, Republic of KoreaDepartment of Organic Material & Fiber Engineering, Chonbuk National University, Jeonju 561-756, Republic of KoreaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh 11421, Saudi ArabiaPetrochemical Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaPetrochemical Research Chair, Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi ArabiaWell-dispersed ZnO(x)CeO2(1−x) nanodots@carbon nanofibers as anode catalysts for the electrooxidation of methanol were synthesized by an easy-controlled template-free method. Their structure and morphology were characterized by X-ray diffraction (XRD), high resolution transmission electron microscopy (HR-TEM), field-emission scanning electron microscopy (FESEM) equipped with rapid EDX (energy dispersive analysis of X-ray). The appealed characterization techniques specified that the obtained material is carbon nanofibers decorated by ZnO and CeO2 nanodots. The electrochemical oxidation of methanol on ZnO(x)CeO2(1−x) nanodots@CNFs modified glassy carbon electrode in alkaline solutions was systematically evaluated by cyclic voltammetry (CV) method. A detailed investigation is made for the electrocatalytic oxidation of methanol by varying methanol concentration. The corresponding current densities of ZnO(60%)CeO2(40%) nanodots@CNFs and ZnO(40%)CeO2(60%) nanodots@CNFs were 5.3 and 16.3 mA/cm2, respectively. Moreover, negative onset potential (−50 mV vs. Ag/AgCl) was observed when ZnO(40%)CeO2(60%) nanodots@CNFs were utilized, which is a superior value among the reported non-precious electrocatalysts. These results suggested cheap and effective nanomaterials as non-precious catalyst for DMFCs application and pave the way to further improve the performance in energy and environmental applications.http://www.sciencedirect.com/science/article/pii/S1878535215001872Carbon nanofibersNanodotsElectrospinningDirect methanol fuel cellsNegative onset potential |
| spellingShingle | Zafar Khan Ghouri Nasser A.M. Barakat Hak Yong Kim Mira Park Khalil Abdelrazek Khalil Mohamed H. El-Newehy Salem S. Al-Deyab Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application Arabian Journal of Chemistry Carbon nanofibers Nanodots Electrospinning Direct methanol fuel cells Negative onset potential |
| title | Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application |
| title_full | Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application |
| title_fullStr | Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application |
| title_full_unstemmed | Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application |
| title_short | Nano-engineered ZnO/CeO2 dots@CNFs for fuel cell application |
| title_sort | nano engineered zno ceo2 dots cnfs for fuel cell application |
| topic | Carbon nanofibers Nanodots Electrospinning Direct methanol fuel cells Negative onset potential |
| url | http://www.sciencedirect.com/science/article/pii/S1878535215001872 |
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