Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation
This study aims to mitigate the CO poisoning of platinum (Pt) surfaces during formic acid electro-oxidation (FAEO), the essential anodic reaction in the direct formic acid fuel cells (DFAFCs). For this purpose, a glassy carbon (GC) electrode was amended sequentially with Pt (n-Pt), gold (n-Au), and...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-08-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535222002817 |
| _version_ | 1818212218058047488 |
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| author | Islam M. Al-Akraa Yaser M. Asal Ahmad M. Mohammad |
| author_facet | Islam M. Al-Akraa Yaser M. Asal Ahmad M. Mohammad |
| author_sort | Islam M. Al-Akraa |
| collection | DOAJ |
| description | This study aims to mitigate the CO poisoning of platinum (Pt) surfaces during formic acid electro-oxidation (FAEO), the essential anodic reaction in the direct formic acid fuel cells (DFAFCs). For this purpose, a glassy carbon (GC) electrode was amended sequentially with Pt (n-Pt), gold (n-Au), and cobalt oxide (n-CoOx) nanostructures. Fascinatingly, the ternary modified n-CoOx/n-Au/n-Pt/GC catalyst (for which n-Pt, n-Au, and n-CoOx were sequentially and respectively assembled onto the GC surface) exhibited a remarkable electrocatalytic enhancement toward FAEO, which surpassed ca. 53 times that of the Pt/GC catalyst. Additionally, it exhibited a much (ca. 18 times) higher stability after 3000 s of continuous electrolysis. The observed enhancement was proven to originate from driving the reaction mechanism principally to the desirable direct dehydrogenation pathway on the expense of the poisoning dehydration path. The impedance and CO stripping measurements confirmed the prevailing of both the electronic and third body effects in the catalytic enhancement. |
| first_indexed | 2024-12-12T05:44:54Z |
| format | Article |
| id | doaj.art-5a39eec8bc6f4bf2aed02bf6680f25c8 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-12-12T05:44:54Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-5a39eec8bc6f4bf2aed02bf6680f25c82022-12-22T00:35:49ZengElsevierArabian Journal of Chemistry1878-53522022-08-01158103965Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidationIslam M. Al-Akraa0Yaser M. Asal1Ahmad M. Mohammad2Department of Chemical Engineering, Faculty of Engineering, The British University in Egypt, Cairo 11837, Egypt; Corresponding authors.Department of Chemical Engineering, Faculty of Engineering, The British University in Egypt, Cairo 11837, EgyptChemistry Department, Faculty of Science, Cairo University, Cairo 12613, Egypt; Corresponding authors.This study aims to mitigate the CO poisoning of platinum (Pt) surfaces during formic acid electro-oxidation (FAEO), the essential anodic reaction in the direct formic acid fuel cells (DFAFCs). For this purpose, a glassy carbon (GC) electrode was amended sequentially with Pt (n-Pt), gold (n-Au), and cobalt oxide (n-CoOx) nanostructures. Fascinatingly, the ternary modified n-CoOx/n-Au/n-Pt/GC catalyst (for which n-Pt, n-Au, and n-CoOx were sequentially and respectively assembled onto the GC surface) exhibited a remarkable electrocatalytic enhancement toward FAEO, which surpassed ca. 53 times that of the Pt/GC catalyst. Additionally, it exhibited a much (ca. 18 times) higher stability after 3000 s of continuous electrolysis. The observed enhancement was proven to originate from driving the reaction mechanism principally to the desirable direct dehydrogenation pathway on the expense of the poisoning dehydration path. The impedance and CO stripping measurements confirmed the prevailing of both the electronic and third body effects in the catalytic enhancement.http://www.sciencedirect.com/science/article/pii/S1878535222002817PoisoningFormic acidCobalt oxideGoldPlatinumFuel cells |
| spellingShingle | Islam M. Al-Akraa Yaser M. Asal Ahmad M. Mohammad Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation Arabian Journal of Chemistry Poisoning Formic acid Cobalt oxide Gold Platinum Fuel cells |
| title | Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation |
| title_full | Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation |
| title_fullStr | Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation |
| title_full_unstemmed | Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation |
| title_short | Surface engineering of Pt surfaces with Au and cobalt oxide nanostructures for enhanced formic acid electro-oxidation |
| title_sort | surface engineering of pt surfaces with au and cobalt oxide nanostructures for enhanced formic acid electro oxidation |
| topic | Poisoning Formic acid Cobalt oxide Gold Platinum Fuel cells |
| url | http://www.sciencedirect.com/science/article/pii/S1878535222002817 |
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