Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst
Abstract Due to their environmentally friendly nature and high energy density, direct ethanol fuel cells have attracted extensive research attention in recent decades. However, the actual Faraday efficiency of the ethanol oxidation reaction (EOR) is much lower than its theoretical value and the reac...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-09-01
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| Series: | Carbon Energy |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/cey2.339 |
| _version_ | 1797672634855456768 |
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| author | Chenjie Han Yeqing Lyu Shaona Wang Biao Liu Yi Zhang Jun Lu Hao Du |
| author_facet | Chenjie Han Yeqing Lyu Shaona Wang Biao Liu Yi Zhang Jun Lu Hao Du |
| author_sort | Chenjie Han |
| collection | DOAJ |
| description | Abstract Due to their environmentally friendly nature and high energy density, direct ethanol fuel cells have attracted extensive research attention in recent decades. However, the actual Faraday efficiency of the ethanol oxidation reaction (EOR) is much lower than its theoretical value and the reaction kinetics of the EOR is sluggish due to insufficient active sites on the electrocatalyst surface. Pt/C is recognized as one of the most promising electrocatalysts for the EOR. Thus, the microscopic interfacial reaction mechanisms of the EOR on Pt/C were systematically studied in this work. In metal hydroxide solutions, hydrated alkali cations were found to bind with OHad through noncovalent interactions to form clusters and occupy the active sites on the Pt/C electrocatalyst surface, thus resulting in low Faraday efficiency and sluggish kinetics of the EOR. To reduce the negative effect of the noncovalent interactions on the EOR, a shield was made on the electrocatalyst surface using 4‐trifluoromethylphenyl, resulting in twice the EOR catalytic reactivity of Pt/C. |
| first_indexed | 2024-03-11T21:33:04Z |
| format | Article |
| id | doaj.art-9b5c86ad9ddc4126ab1516f52845f399 |
| institution | Directory Open Access Journal |
| issn | 2637-9368 |
| language | English |
| last_indexed | 2024-03-11T21:33:04Z |
| publishDate | 2023-09-01 |
| publisher | Wiley |
| record_format | Article |
| series | Carbon Energy |
| spelling | doaj.art-9b5c86ad9ddc4126ab1516f52845f3992023-09-27T07:59:26ZengWileyCarbon Energy2637-93682023-09-0159n/an/a10.1002/cey2.339Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalystChenjie Han0Yeqing Lyu1Shaona Wang2Biao Liu3Yi Zhang4Jun Lu5Hao Du6National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaNational Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaNational Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaNational Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaNational Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaCollege of Chemical and Biological Engineering Zhejiang University Hangzhou ChinaNational Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering Chinese Academy of Sciences Beijing ChinaAbstract Due to their environmentally friendly nature and high energy density, direct ethanol fuel cells have attracted extensive research attention in recent decades. However, the actual Faraday efficiency of the ethanol oxidation reaction (EOR) is much lower than its theoretical value and the reaction kinetics of the EOR is sluggish due to insufficient active sites on the electrocatalyst surface. Pt/C is recognized as one of the most promising electrocatalysts for the EOR. Thus, the microscopic interfacial reaction mechanisms of the EOR on Pt/C were systematically studied in this work. In metal hydroxide solutions, hydrated alkali cations were found to bind with OHad through noncovalent interactions to form clusters and occupy the active sites on the Pt/C electrocatalyst surface, thus resulting in low Faraday efficiency and sluggish kinetics of the EOR. To reduce the negative effect of the noncovalent interactions on the EOR, a shield was made on the electrocatalyst surface using 4‐trifluoromethylphenyl, resulting in twice the EOR catalytic reactivity of Pt/C.https://doi.org/10.1002/cey2.339ethanol electro‐oxidationFaraday efficiencykineticsmodification of electrocatalystnoncovalent interactions |
| spellingShingle | Chenjie Han Yeqing Lyu Shaona Wang Biao Liu Yi Zhang Jun Lu Hao Du Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst Carbon Energy ethanol electro‐oxidation Faraday efficiency kinetics modification of electrocatalyst noncovalent interactions |
| title | Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst |
| title_full | Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst |
| title_fullStr | Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst |
| title_full_unstemmed | Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst |
| title_short | Noncovalent interactions on the electrocatalytic oxidation of ethanol on a Pt/C electrocatalyst |
| title_sort | noncovalent interactions on the electrocatalytic oxidation of ethanol on a pt c electrocatalyst |
| topic | ethanol electro‐oxidation Faraday efficiency kinetics modification of electrocatalyst noncovalent interactions |
| url | https://doi.org/10.1002/cey2.339 |
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