Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application
Alcohol electrooxidation is a crucial reaction in direct alcohol fuel cells (DAFCs), efficiently converting alcohols like methanol and ethanol into electricity with minimal environmental impact, offering a sustainable alternative to fossil fuels. This process is vital for renewable energy technologi...
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Elsevier
2025-07-01
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| Series: | Electrochemistry Communications |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S138824812500075X |
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| author | Ali Ahmadi Hadi Ebrahimifar Mohammad Bagher Askari |
| author_facet | Ali Ahmadi Hadi Ebrahimifar Mohammad Bagher Askari |
| author_sort | Ali Ahmadi |
| collection | DOAJ |
| description | Alcohol electrooxidation is a crucial reaction in direct alcohol fuel cells (DAFCs), efficiently converting alcohols like methanol and ethanol into electricity with minimal environmental impact, offering a sustainable alternative to fossil fuels. This process is vital for renewable energy technologies, promoting clean energy solutions. Research in this field considers electrocatalyst development, improving reaction kinetics, and reducing fuel cell costs. The wide application of catalyst-based metal oxides led us to synthesize a three-component catalyst, including nickel oxide (NiO)/lanthanum oxide (La2O3) catalyst and its hybrid with carbon nanotubes (MWCNT), with the hydrothermal method. The capability of catalysts was investigated in alcohol oxidation reactions (AOR). The successful synthesis of NiO/La2O3 and NiO/La2O3/MWCNTs catalysts was confirmed. The effect of adding carbon nanotubes to the NiO/La2O3 double metal oxide structure on the methanol and ethanol oxidation reaction (MOR and EOR) was investigated. In MOR and EOR by NiO/La2O3/MWCNTs catalyst, the maximum current densities of 110.71 and 43.56 mA/cm2 were obtained at potentials of 0.66 and 0.62 V, respectively, representing relatively good efficiency as a direct alcohol fuel cell (DAFC) catalyst. Also, the comparison of the Tofel slope of NiO/ La2O3 and NiO/La2O3/MWCNTs catalysts in MOR and EOR processes shows the faster kinetics of the catalyst containing carbon nanotubes in these processes. So, good performance and high stability of catalysts can be promising for further operational investigations. |
| format | Article |
| id | doaj-art-2d1afd89ffd343b3986fe1d5b529cc78 |
| institution | OA Journals |
| issn | 1388-2481 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
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| series | Electrochemistry Communications |
| spelling | doaj-art-2d1afd89ffd343b3986fe1d5b529cc782025-08-20T02:04:49ZengElsevierElectrochemistry Communications1388-24812025-07-0117610793610.1016/j.elecom.2025.107936Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC applicationAli Ahmadi0Hadi Ebrahimifar1Mohammad Bagher Askari2Department of Materials Engineering, Faculty of Mechanical and Materials Engineering, Graduate University of Advanced Technology, Kerman, IranDepartment of Materials Engineering, Faculty of Mechanical and Materials Engineering, Graduate University of Advanced Technology, Kerman, Iran; Corresponding authors.Department of Semiconductor, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology, Kerman, Iran; Corresponding authors.Alcohol electrooxidation is a crucial reaction in direct alcohol fuel cells (DAFCs), efficiently converting alcohols like methanol and ethanol into electricity with minimal environmental impact, offering a sustainable alternative to fossil fuels. This process is vital for renewable energy technologies, promoting clean energy solutions. Research in this field considers electrocatalyst development, improving reaction kinetics, and reducing fuel cell costs. The wide application of catalyst-based metal oxides led us to synthesize a three-component catalyst, including nickel oxide (NiO)/lanthanum oxide (La2O3) catalyst and its hybrid with carbon nanotubes (MWCNT), with the hydrothermal method. The capability of catalysts was investigated in alcohol oxidation reactions (AOR). The successful synthesis of NiO/La2O3 and NiO/La2O3/MWCNTs catalysts was confirmed. The effect of adding carbon nanotubes to the NiO/La2O3 double metal oxide structure on the methanol and ethanol oxidation reaction (MOR and EOR) was investigated. In MOR and EOR by NiO/La2O3/MWCNTs catalyst, the maximum current densities of 110.71 and 43.56 mA/cm2 were obtained at potentials of 0.66 and 0.62 V, respectively, representing relatively good efficiency as a direct alcohol fuel cell (DAFC) catalyst. Also, the comparison of the Tofel slope of NiO/ La2O3 and NiO/La2O3/MWCNTs catalysts in MOR and EOR processes shows the faster kinetics of the catalyst containing carbon nanotubes in these processes. So, good performance and high stability of catalysts can be promising for further operational investigations.http://www.sciencedirect.com/science/article/pii/S138824812500075XNiO/La2O3/MWCNTsMOREORDAFC |
| spellingShingle | Ali Ahmadi Hadi Ebrahimifar Mohammad Bagher Askari Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application Electrochemistry Communications NiO/La2O3/MWCNTs MOR EOR DAFC |
| title | Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application |
| title_full | Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application |
| title_fullStr | Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application |
| title_full_unstemmed | Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application |
| title_short | Alcohol electrooxidation on three-component NiO/La2O3/MWCNTs catalyst for DAFC application |
| title_sort | alcohol electrooxidation on three component nio la2o3 mwcnts catalyst for dafc application |
| topic | NiO/La2O3/MWCNTs MOR EOR DAFC |
| url | http://www.sciencedirect.com/science/article/pii/S138824812500075X |
| work_keys_str_mv | AT aliahmadi alcoholelectrooxidationonthreecomponentniola2o3mwcntscatalystfordafcapplication AT hadiebrahimifar alcoholelectrooxidationonthreecomponentniola2o3mwcntscatalystfordafcapplication AT mohammadbagheraskari alcoholelectrooxidationonthreecomponentniola2o3mwcntscatalystfordafcapplication |